{"id":7584,"date":"2026-03-14T13:19:08","date_gmt":"2026-03-14T12:19:08","guid":{"rendered":"https:\/\/yfconnectivity.com\/?p=7584"},"modified":"2026-03-14T13:19:25","modified_gmt":"2026-03-14T12:19:25","slug":"guide-de-fibre-a-ame-creuse","status":"publish","type":"post","link":"https:\/\/yfconnectivity.com\/fr\/hollow-core-fiber-guide\/","title":{"rendered":"Fibre \u00e0 c\u0153ur creux (HCF) : Le guide d\u00e9finitif de l'avenir des r\u00e9seaux optiques"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"7584\" class=\"elementor elementor-7584\" data-elementor-post-type=\"post\">\n\t\t\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-element elementor-element-9241746 e-flex e-con-boxed e-con e-parent\" data-id=\"9241746\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-element elementor-element-260a683 e-con-full e-flex e-con e-child\" data-id=\"260a683\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-07ad343 elementor-widget elementor-widget-heading\" data-id=\"07ad343\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Expert Summary<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-60bc2d4 elementor-widget elementor-widget-text-editor\" data-id=\"60bc2d4\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Hollow Core Fiber (HCF) is an emerging optical fiber technology that allows light to travel primarily through air instead of glass, significantly reducing signal delay and nonlinear optical effects. Because the refractive index of air is much lower than that of silica, signals in HCF can propagate about 46% faster than in traditional fiber, reducing latency to roughly 3.3 \u03bcs\/km.<\/p><p>With rapid progress in manufacturing and attenuation reduction\u2014reaching 0.138 dB\/km at 1550 nm in research environments\u2014HCF is increasingly seen as a promising technology for AI backend networks, cloud infrastructure, financial trading networks, and next-generation telecom systems.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-eda93d4 elementor-toc--content-ellipsis elementor-widget__width-initial elementor-hidden-desktop elementor-hidden-tablet elementor-toc--minimized-on-tablet elementor-widget elementor-widget-table-of-contents\" data-id=\"eda93d4\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;no_headings_message&quot;:&quot;No headings were found on this page.&quot;,&quot;container&quot;:&quot;.main-content&quot;,&quot;min_height&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:0,&quot;sizes&quot;:[]},&quot;headings_by_tags&quot;:[&quot;h2&quot;,&quot;h3&quot;,&quot;h4&quot;,&quot;h5&quot;,&quot;h6&quot;],&quot;marker_view&quot;:&quot;numbers&quot;,&quot;minimize_box&quot;:&quot;yes&quot;,&quot;minimized_on&quot;:&quot;tablet&quot;,&quot;hierarchical_view&quot;:&quot;yes&quot;,&quot;min_height_tablet&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]},&quot;min_height_mobile&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]}}\" data-widget_type=\"table-of-contents.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-toc__header\">\n\t\t\t\t\t\t<h4 class=\"elementor-toc__header-title\">\n\t\t\t\tTABLE OF CONTENTS\t\t\t<\/h4>\n\t\t\t\t\t\t\t\t\t\t<div class=\"elementor-toc__toggle-button elementor-toc__toggle-button--expand\" role=\"button\" tabindex=\"0\" aria-controls=\"elementor-toc__eda93d4\" aria-expanded=\"true\" aria-label=\"Open table of contents\"><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-chevron-down\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M207.029 381.476L12.686 187.132c-9.373-9.373-9.373-24.569 0-33.941l22.667-22.667c9.357-9.357 24.522-9.375 33.901-.04L224 284.505l154.745-154.021c9.379-9.335 24.544-9.317 33.901.04l22.667 22.667c9.373 9.373 9.373 24.569 0 33.941L240.971 381.476c-9.373 9.372-24.569 9.372-33.942 0z\"><\/path><\/svg><\/div>\n\t\t\t\t<div class=\"elementor-toc__toggle-button elementor-toc__toggle-button--collapse\" role=\"button\" tabindex=\"0\" aria-controls=\"elementor-toc__eda93d4\" aria-expanded=\"true\" aria-label=\"Close table of contents\"><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-chevron-up\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M240.971 130.524l194.343 194.343c9.373 9.373 9.373 24.569 0 33.941l-22.667 22.667c-9.357 9.357-24.522 9.375-33.901.04L224 227.495 69.255 381.516c-9.379 9.335-24.544 9.317-33.901-.04l-22.667-22.667c-9.373-9.373-9.373-24.569 0-33.941L207.03 130.525c9.372-9.373 24.568-9.373 33.941-.001z\"><\/path><\/svg><\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<div id=\"elementor-toc__eda93d4\" class=\"elementor-toc__body\">\n\t\t\t<div class=\"elementor-toc__spinner-container\">\n\t\t\t\t<svg class=\"elementor-toc__spinner eicon-animation-spin e-font-icon-svg e-eicon-loading\" aria-hidden=\"true\" viewBox=\"0 0 1000 1000\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M500 975V858C696 858 858 696 858 500S696 142 500 142 142 304 142 500H25C25 237 238 25 500 25S975 237 975 500 763 975 500 975Z\"><\/path><\/svg>\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c367a74 elementor-widget elementor-widget-heading\" data-id=\"c367a74\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Why a New Type of Optical Fiber Is Emerging<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c057bb9 elementor-widget elementor-widget-text-editor\" data-id=\"c057bb9\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>For decades, optical fiber has been the backbone of the internet. Every email, video call, cloud service, and AI workload ultimately depends on signals traveling through glass fibers across continents and oceans.<\/p><p>However, traditional fiber technology is gradually approaching its physical limits. As global data traffic continues to grow\u2014driven by artificial intelligence, cloud computing, and real-time digital services\u2014network operators are searching for new ways to reduce latency and increase transmission efficiency.<\/p><p>A new approach is now gaining attention: <strong>Hollow Core Fiber (HCF)<\/strong>.<\/p><p>Instead of sending light through solid glass, this technology allows signals to propagate primarily through <strong>air<\/strong>, fundamentally changing how optical communication works.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9e694b8 elementor-widget elementor-widget-heading\" data-id=\"9e694b8\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">What Is Hollow Core Fiber?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0cda126 elementor-widget elementor-widget-image\" data-id=\"0cda126\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"800\" height=\"599\" src=\"https:\/\/yfconnectivity.com\/wp-content\/uploads\/2026\/03\/hollow-core-fiber-post-cover.webp\" class=\"attachment-large size-large wp-image-7590\" alt=\"hollow core fiber post cover\" srcset=\"https:\/\/yfconnectivity.com\/wp-content\/uploads\/2026\/03\/hollow-core-fiber-post-cover.webp 800w, https:\/\/yfconnectivity.com\/wp-content\/uploads\/2026\/03\/hollow-core-fiber-post-cover-300x225.webp 300w, https:\/\/yfconnectivity.com\/wp-content\/uploads\/2026\/03\/hollow-core-fiber-post-cover-768x575.webp 768w, https:\/\/yfconnectivity.com\/wp-content\/uploads\/2026\/03\/hollow-core-fiber-post-cover-16x12.webp 16w, https:\/\/yfconnectivity.com\/wp-content\/uploads\/2026\/03\/hollow-core-fiber-post-cover-600x449.webp 600w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-90dcdb6 elementor-widget elementor-widget-text-editor\" data-id=\"90dcdb6\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Figure 1: hollow core fiber example<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-04a9846 elementor-widget elementor-widget-text-editor\" data-id=\"04a9846\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Hollow Core Fiber (HCF)\u00a0is a special type of optical fiber where the central core is mostly air rather than solid glass.<\/p><p>In conventional fiber, light travels through a glass core surrounded by cladding. In hollow core fiber, the glass structure forms a complex microscopic framework around an air channel, which acts as the primary transmission path.<\/p><p>Because air has a refractive index close to 1 while silica glass has a refractive index of roughly 1.47, light traveling through air experiences significantly less delay and fewer nonlinear effects.<\/p><p>A simple analogy helps illustrate the difference:<\/p><ul><li>Traditional fiber is like sending light through a <strong>glass tunnel<\/strong>.<\/li><li>Hollow core fiber is like sending light through an <strong>air tunnel surrounded by reflective walls<\/strong>.<\/li><\/ul><p>Despite this structural difference, hollow core fiber still resembles standard fiber externally. Typical parameters include:<\/p><ul><li>outer diameter: about <strong>125 \u03bcm<\/strong><\/li><li>air core diameter: typically <strong>several to tens of micrometers<\/strong><\/li><li>internal structure: precisely arranged micro-air-hole cladding<\/li><\/ul><p>These microscopic structures are what allow the fiber to guide light through air while maintaining signal stability.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4a2c09e elementor-widget elementor-widget-heading\" data-id=\"4a2c09e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">How Hollow Core Fiber Works<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7cec1b0 elementor-widget elementor-widget-text-editor\" data-id=\"7cec1b0\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Traditional optical fibers guide light using<br \/>Total Internal Reflection.<\/p><p>Light repeatedly reflects between the core and cladding as it travels down the fiber. While this mechanism has enabled global communication networks, it also introduces limitations because the signal interacts continuously with the glass medium.<\/p><p>Glass interaction leads to:<\/p><ul><li>optical absorption<\/li><li>scattering losses<\/li><li>nonlinear optical effects<\/li><li>signal distortion at high optical power<\/li><\/ul><p>Hollow core fiber avoids many of these issues by confining the light inside an <strong>air channel<\/strong>, minimizing interaction with glass.<\/p><p>Two major guiding mechanisms are used today.<br \/><br \/><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3bd095d elementor-widget elementor-widget-heading\" data-id=\"3bd095d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Photonic Bandgap Hollow Core Fiber<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-212fa18 elementor-widget elementor-widget-image\" data-id=\"212fa18\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"829\" height=\"173\" src=\"https:\/\/yfconnectivity.com\/wp-content\/uploads\/2026\/03\/photonic-bandgap-hollow-core-fiber-structures.webp\" class=\"attachment-large size-large wp-image-7589\" alt=\"Different photonic bandgap hollow core fiber (PBGF) structures used for guiding light in air-core optical fibers\" srcset=\"https:\/\/yfconnectivity.com\/wp-content\/uploads\/2026\/03\/photonic-bandgap-hollow-core-fiber-structures.webp 829w, https:\/\/yfconnectivity.com\/wp-content\/uploads\/2026\/03\/photonic-bandgap-hollow-core-fiber-structures-300x63.webp 300w, https:\/\/yfconnectivity.com\/wp-content\/uploads\/2026\/03\/photonic-bandgap-hollow-core-fiber-structures-768x160.webp 768w, https:\/\/yfconnectivity.com\/wp-content\/uploads\/2026\/03\/photonic-bandgap-hollow-core-fiber-structures-18x4.webp 18w, https:\/\/yfconnectivity.com\/wp-content\/uploads\/2026\/03\/photonic-bandgap-hollow-core-fiber-structures-600x125.webp 600w\" sizes=\"(max-width: 829px) 100vw, 829px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1e4d507 elementor-widget elementor-widget-text-editor\" data-id=\"1e4d507\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Figure 2: Different structural designs of photonic bandgap hollow core fibers (PBGF), showing how periodic microstructures in the cladding confine light within the air core.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f698f08 elementor-widget elementor-widget-text-editor\" data-id=\"f698f08\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>One of the earliest designs relies on the concept of a\u00a0Photonic Band Gap.<\/p><p>In this approach, the cladding contains a periodic arrangement of microscopic air holes that form a <strong>photonic crystal structure<\/strong>. This structure prevents certain wavelengths from escaping the core, effectively trapping the light within the central air channel.<\/p><p>You can imagine this as a microscopic mirror maze surrounding the light path, reflecting the signal back toward the center.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9a1a015 elementor-widget elementor-widget-heading\" data-id=\"9a1a015\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Anti-Resonant Hollow Core Fiber<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-48617d5 elementor-widget elementor-widget-image\" data-id=\"48617d5\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"831\" height=\"492\" src=\"https:\/\/yfconnectivity.com\/wp-content\/uploads\/2026\/03\/anti-resonant-hollow-core-fiber-structures-hc-arf.webp\" class=\"attachment-large size-large wp-image-7588\" alt=\"Structural designs of anti-resonant hollow core fibers (HC-ARF) including capillary-based air-core fiber geometries\" srcset=\"https:\/\/yfconnectivity.com\/wp-content\/uploads\/2026\/03\/anti-resonant-hollow-core-fiber-structures-hc-arf.webp 831w, https:\/\/yfconnectivity.com\/wp-content\/uploads\/2026\/03\/anti-resonant-hollow-core-fiber-structures-hc-arf-300x178.webp 300w, https:\/\/yfconnectivity.com\/wp-content\/uploads\/2026\/03\/anti-resonant-hollow-core-fiber-structures-hc-arf-768x455.webp 768w, https:\/\/yfconnectivity.com\/wp-content\/uploads\/2026\/03\/anti-resonant-hollow-core-fiber-structures-hc-arf-18x12.webp 18w, https:\/\/yfconnectivity.com\/wp-content\/uploads\/2026\/03\/anti-resonant-hollow-core-fiber-structures-hc-arf-600x355.webp 600w\" sizes=\"(max-width: 831px) 100vw, 831px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3630974 elementor-widget elementor-widget-text-editor\" data-id=\"3630974\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Figure 3: Representative structural configurations of anti-resonant hollow core fibers (HC-ARF), where thin glass capillaries surrounding the air core reflect light through anti-resonant mechanisms.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7b7acb2 elementor-widget elementor-widget-text-editor\" data-id=\"7b7acb2\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>A newer and increasingly popular approach is <strong>anti-resonant hollow core fiber<\/strong>.<\/p><p>Instead of relying on a dense photonic crystal, this design uses thin glass capillaries surrounding the air core. These capillaries reflect light back into the core through resonance-based optical effects.<\/p><p>One of the most promising designs in this category is <strong>Nested Anti-Resonant Fiber (NANF)<\/strong>. The NANF structure places additional nested capillaries inside the cladding tubes, which improves confinement and reduces loss.<\/p><p>Compared with earlier designs, <strong>NANF hollow core fibers<\/strong>\u00a0offer several advantages:<\/p><ul><li>lower attenuation<\/li><li>broader low-loss bandwidth<\/li><li>simpler fabrication structures<\/li><\/ul><p>Because of these improvements, <strong>NANF-based HCF designs<\/strong>\u00a0are widely considered one of the most promising candidates for large-scale deployment.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a6c3d03 elementor-widget elementor-widget-heading\" data-id=\"a6c3d03\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Hollow Core Fiber vs Traditional Optical Fiber<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-bf657cb elementor-widget elementor-widget-text-editor\" data-id=\"bf657cb\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>The differences between conventional fiber and hollow core fiber become clearer when comparing key performance metrics.<\/p><table><tbody><tr><td><p><strong><b>Feature<\/b><\/strong><\/p><\/td><td><p><strong><b>Traditional Fiber<\/b><\/strong><\/p><\/td><td><p><strong><b>Hollow Core Fiber<\/b><\/strong><\/p><\/td><\/tr><tr><td><p>Light propagation medium<\/p><\/td><td><p>Glass<\/p><\/td><td><p>Air<\/p><\/td><\/tr><tr><td><p>Typical latency<\/p><\/td><td><p>~5 \u03bcs\/km<\/p><\/td><td><p>~3.3 \u03bcs\/km<\/p><\/td><\/tr><tr><td><p>Relative signal speed<\/p><\/td><td><p>Baseline<\/p><\/td><td><p>~46% faster<\/p><\/td><\/tr><tr><td><p>Nonlinear optical effects<\/p><\/td><td><p>Significant<\/p><\/td><td><p>&gt;1000\u00d7 lower<\/p><\/td><\/tr><tr><td><p>High-power laser transmission<\/p><\/td><td><p>Limited<\/p><\/td><td><p>Very high capability<\/p><\/td><\/tr><tr><td><p>Manufacturing maturity<\/p><\/td><td><p>Highly mature<\/p><\/td><td><p>Emerging<\/p><\/td><\/tr><\/tbody><\/table><p>Two characteristics make HCF particularly attractive.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3e46aaf elementor-widget elementor-widget-heading\" data-id=\"3e46aaf\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Ultra-Low Latency<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-85d2888 elementor-widget elementor-widget-text-editor\" data-id=\"85d2888\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>In conventional single-mode fiber, signal latency is typically around <strong>5 microseconds per kilometer<\/strong>.<\/p><p>Hollow core fiber reduces this to roughly <strong>3.3 microseconds per kilometer<\/strong>, saving approximately <strong>1.54 microseconds of round-trip delay per kilometer<\/strong>.<\/p><p>Although this difference may seem small, it becomes extremely significant over long distances or in applications where microseconds matter.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a3da7b2 elementor-widget elementor-widget-heading\" data-id=\"a3da7b2\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Extremely Low Nonlinear Effects<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2fdf44a elementor-widget elementor-widget-text-editor\" data-id=\"2fdf44a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Because light in hollow core fiber travels mostly through air, nonlinear optical effects are <strong>more than 1000 times lower<\/strong>\u00a0than in conventional single-mode fiber.<\/p><p>This property allows HCF to support:<\/p><ul><li>significantly higher optical power<\/li><li>cleaner signal transmission<\/li><li>reduced distortion in high-capacity communication systems<\/li><\/ul><p>It also makes the technology particularly suitable for <strong>high-power laser delivery systems<\/strong>.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f6a953a elementor-widget elementor-widget-heading\" data-id=\"f6a953a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Rapid Progress in Loss Reduction<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-74ca681 elementor-widget elementor-widget-text-editor\" data-id=\"74ca681\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Historically, one of the biggest obstacles for hollow core fiber was attenuation. Early prototypes exhibited losses of <strong>hundreds of dB\/km<\/strong>, making them impractical for real networks. Over the past decade, however, major breakthroughs have dramatically improved performance.<\/p><p>Researchers at University of Southampton have demonstrated hollow core fibers with attenuation as low as:<\/p><p><strong>0.138 dB\/km at the 1550 nm communication wavelength.<\/strong><\/p><p>This figure approaches\u2014and in some wavelength ranges even challenges\u2014the theoretical limits of conventional silica fiber.<\/p><p>These advances suggest that hollow core fiber could soon become viable for long-distance communication links.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-fac5185 elementor-widget elementor-widget-heading\" data-id=\"fac5185\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">How Hollow Core Fiber Is Tested: OTDR vs OFDR<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ab7b4c1 elementor-widget elementor-widget-text-editor\" data-id=\"ab7b4c1\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p data-start=\"331\" data-end=\"587\">Testing hollow core fiber (HCF) presents unique challenges. Because light propagates mainly through <strong data-start=\"431\" data-end=\"462\">air rather than solid glass<\/strong>, traditional measurement methods designed for conventional fiber do not always deliver sufficient resolution or sensitivity.<\/p><p data-start=\"589\" data-end=\"876\">Currently, the most common testing solutions for hollow core fiber still rely on traditional tools such as <strong data-start=\"696\" data-end=\"741\">Optical Time Domain Reflectometers (OTDR)<\/strong> and <strong data-start=\"746\" data-end=\"770\">optical power meters<\/strong>. These instruments are widely used in fiber networks to measure attenuation, splice loss, and continuity.<\/p><p data-start=\"878\" data-end=\"957\">However, when applied to hollow core fiber, two major limitations often appear:<\/p><ul data-start=\"959\" data-end=\"1075\"><li data-section-id=\"s802vs\" data-start=\"959\" data-end=\"1003\"><p data-start=\"961\" data-end=\"1003\"><strong data-start=\"961\" data-end=\"980\">Long dead zones<\/strong> in OTDR measurements<\/p><\/li><li data-section-id=\"1bgn1c1\" data-start=\"1004\" data-end=\"1075\"><p data-start=\"1006\" data-end=\"1075\"><strong data-start=\"1006\" data-end=\"1029\">Limited sensitivity<\/strong> for detecting very small scattering signals<\/p><\/li><\/ul><p data-start=\"1077\" data-end=\"1196\">These limitations become more apparent when testing long spans of HCF or when analyzing detailed structural properties.<\/p><p data-start=\"1198\" data-end=\"1446\">To overcome these challenges, researchers are increasingly turning to <strong data-start=\"1268\" data-end=\"1317\">Optical Frequency Domain Reflectometry (OFDR)<\/strong>, a high-resolution distributed sensing technology capable of mapping optical characteristics along the entire length of a fiber.<\/p><p data-start=\"1448\" data-end=\"1729\">At the <span class=\"hover:entity-accent entity-underline inline cursor-pointer align-baseline\"><span class=\"whitespace-normal\">Optical Fiber Communication Conference 2025<\/span><\/span> (OFC 2025), researchers led by <span class=\"hover:entity-accent entity-underline inline cursor-pointer align-baseline\"><span class=\"whitespace-normal\">N. K. Fontaine<\/span><\/span> demonstrated two advanced OFDR systems capable of performing highly detailed distributed characterization of <strong data-start=\"1671\" data-end=\"1728\">Double Nested Anti-Resonant Hollow Core Fiber (DNANF)<\/strong>.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-653d56b elementor-widget elementor-widget-image\" data-id=\"653d56b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"831\" height=\"527\" src=\"https:\/\/yfconnectivity.com\/wp-content\/uploads\/2026\/03\/ofdr-polarization-resolved-measurement-4-9km-dnanf-hollow-core-fiber.webp\" class=\"attachment-large size-large wp-image-7593\" alt=\"Polarization-resolved OFDR measurement results of a 4.9 km DNANF hollow core fiber compared with standard single mode fiber\" srcset=\"https:\/\/yfconnectivity.com\/wp-content\/uploads\/2026\/03\/ofdr-polarization-resolved-measurement-4-9km-dnanf-hollow-core-fiber.webp 831w, https:\/\/yfconnectivity.com\/wp-content\/uploads\/2026\/03\/ofdr-polarization-resolved-measurement-4-9km-dnanf-hollow-core-fiber-300x190.webp 300w, https:\/\/yfconnectivity.com\/wp-content\/uploads\/2026\/03\/ofdr-polarization-resolved-measurement-4-9km-dnanf-hollow-core-fiber-768x487.webp 768w, https:\/\/yfconnectivity.com\/wp-content\/uploads\/2026\/03\/ofdr-polarization-resolved-measurement-4-9km-dnanf-hollow-core-fiber-18x12.webp 18w, https:\/\/yfconnectivity.com\/wp-content\/uploads\/2026\/03\/ofdr-polarization-resolved-measurement-4-9km-dnanf-hollow-core-fiber-600x381.webp 600w\" sizes=\"(max-width: 831px) 100vw, 831px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-37d8761 elementor-widget elementor-widget-text-editor\" data-id=\"37d8761\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Figure 4: Polarization-resolved OFDR measurement of a 4.9 km DNANF hollow core fiber. (a) shows the comparison between SMF, HCF, and the electronic noise floor; (b\u2013c) zoom in on the fiber input and HCF output ends; (d\u2013f) illustrate polarization spectral shifts derived from backscatter correlation for forward and backward HCF launches and SMF reference; (g) compares the average polarization spectral shift across multiple fiber types.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4d03a71 elementor-widget elementor-widget-image\" data-id=\"4d03a71\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"831\" height=\"318\" src=\"https:\/\/yfconnectivity.com\/wp-content\/uploads\/2026\/03\/long-distance-ofdr-measurement-100km-hollow-core-fiber.webp\" class=\"attachment-large size-large wp-image-7592\" alt=\"OFDR measurement over 100 km showing forward and backward traces and attenuation characteristics of hollow core fiber\" srcset=\"https:\/\/yfconnectivity.com\/wp-content\/uploads\/2026\/03\/long-distance-ofdr-measurement-100km-hollow-core-fiber.webp 831w, https:\/\/yfconnectivity.com\/wp-content\/uploads\/2026\/03\/long-distance-ofdr-measurement-100km-hollow-core-fiber-300x115.webp 300w, https:\/\/yfconnectivity.com\/wp-content\/uploads\/2026\/03\/long-distance-ofdr-measurement-100km-hollow-core-fiber-768x294.webp 768w, https:\/\/yfconnectivity.com\/wp-content\/uploads\/2026\/03\/long-distance-ofdr-measurement-100km-hollow-core-fiber-18x7.webp 18w, https:\/\/yfconnectivity.com\/wp-content\/uploads\/2026\/03\/long-distance-ofdr-measurement-100km-hollow-core-fiber-600x230.webp 600w\" sizes=\"(max-width: 831px) 100vw, 831px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-64a9ae9 elementor-widget elementor-widget-text-editor\" data-id=\"64a9ae9\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Figure 5: Long-range OFDR measurement results averaged over 50 wavelengths across a 100 km span. (a) forward and backward OFDR traces; (b) measured fiber attenuation profile.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8c1f17a elementor-widget elementor-widget-text-editor\" data-id=\"8c1f17a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p data-start=\"1731\" data-end=\"1791\">Their work introduced two complementary measurement systems:<\/p><div class=\"TyagGW_tableContainer\"><div class=\"group TyagGW_tableWrapper flex flex-col-reverse w-fit\" tabindex=\"-1\"><table class=\"w-fit min-w-(--thread-content-width)\" data-start=\"1793\" data-end=\"2058\"><thead data-start=\"1793\" data-end=\"1854\"><tr data-start=\"1793\" data-end=\"1854\"><th class=\"\" data-start=\"1793\" data-end=\"1807\" data-col-size=\"sm\">OFDR System<\/th><th class=\"\" data-start=\"1807\" data-end=\"1827\" data-col-size=\"sm\">Measurement Range<\/th><th class=\"\" data-start=\"1827\" data-end=\"1840\" data-col-size=\"sm\">Resolution<\/th><th class=\"\" data-start=\"1840\" data-end=\"1854\" data-col-size=\"md\">Capability<\/th><\/tr><\/thead><tbody data-start=\"1873\" data-end=\"2058\"><tr data-start=\"1873\" data-end=\"1972\"><td data-start=\"1873\" data-end=\"1896\" data-col-size=\"sm\">High-resolution OFDR<\/td><td data-col-size=\"sm\" data-start=\"1896\" data-end=\"1909\">Up to 5 km<\/td><td data-col-size=\"sm\" data-start=\"1909\" data-end=\"1926\">Sub-millimeter<\/td><td data-col-size=\"md\" data-start=\"1926\" data-end=\"1972\">Distributed mode birefringence measurement<\/td><\/tr><tr data-start=\"1973\" data-end=\"2058\"><td data-start=\"1973\" data-end=\"1991\" data-col-size=\"sm\">Long-range OFDR<\/td><td data-col-size=\"sm\" data-start=\"1991\" data-end=\"2005\">Over 100 km<\/td><td data-col-size=\"sm\" data-start=\"2005\" data-end=\"2033\">3 m @10 km \/ 25 m @100 km<\/td><td data-col-size=\"md\" data-start=\"2033\" data-end=\"2058\">Dynamic range &gt; 90 dB<\/td><\/tr><\/tbody><\/table><\/div><\/div><p data-start=\"2060\" data-end=\"2171\">These results represent one of the most detailed distributed measurements ever performed on hollow core fibers.<\/p><p data-start=\"2173\" data-end=\"2425\">Real-world testing is also beginning to appear outside academic labs. For example, engineers using OFDR equipment from <span class=\"hover:entity-accent entity-underline inline cursor-pointer align-baseline\"><span class=\"whitespace-normal\">HaoHeng Technology<\/span><\/span> recently performed distributed scattering measurements on a <strong data-start=\"2390\" data-end=\"2424\">~1 km hollow core fiber sample<\/strong>.<\/p><p data-start=\"2427\" data-end=\"2744\">The measurement results showed a gradual increase in transmission loss as distance increased, which is consistent with theoretical expectations. Because the tested fiber was a <strong data-start=\"2603\" data-end=\"2636\">Photonic Bandgap Fiber (PBGF)<\/strong> designed for sensing applications, the OFDR scanning curve closely matched the predicted performance model.<\/p><p data-start=\"2746\" data-end=\"2944\">As hollow core fiber technology continues to evolve, <strong data-start=\"2799\" data-end=\"2899\">high-resolution distributed measurement methods like OFDR are expected to become essential tools<\/strong> for both research and industrial validation.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2470162 elementor-widget elementor-widget-image\" data-id=\"2470162\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"830\" height=\"343\" src=\"https:\/\/yfconnectivity.com\/wp-content\/uploads\/2026\/03\/ofdr-distributed-scattering-measurement-1km-hollow-core-fiber.webp\" class=\"attachment-large size-large wp-image-7591\" alt=\"Distributed scattering measurement of a 1 km hollow core fiber using OFDR technology\" srcset=\"https:\/\/yfconnectivity.com\/wp-content\/uploads\/2026\/03\/ofdr-distributed-scattering-measurement-1km-hollow-core-fiber.webp 830w, https:\/\/yfconnectivity.com\/wp-content\/uploads\/2026\/03\/ofdr-distributed-scattering-measurement-1km-hollow-core-fiber-300x124.webp 300w, https:\/\/yfconnectivity.com\/wp-content\/uploads\/2026\/03\/ofdr-distributed-scattering-measurement-1km-hollow-core-fiber-768x317.webp 768w, https:\/\/yfconnectivity.com\/wp-content\/uploads\/2026\/03\/ofdr-distributed-scattering-measurement-1km-hollow-core-fiber-18x7.webp 18w, https:\/\/yfconnectivity.com\/wp-content\/uploads\/2026\/03\/ofdr-distributed-scattering-measurement-1km-hollow-core-fiber-600x248.webp 600w\" sizes=\"(max-width: 830px) 100vw, 830px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a326c12 elementor-widget elementor-widget-text-editor\" data-id=\"a326c12\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Figure 5:Distributed scattering measurement of a 1 km hollow core fiber using OFDR equipment, illustrating signal attenuation characteristics along the fiber length.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-080d60c elementor-widget elementor-widget-heading\" data-id=\"080d60c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Real-World Applications and Industry Adoption<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d1b8047 elementor-widget elementor-widget-text-editor\" data-id=\"d1b8047\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Although still emerging, hollow core fiber is already being explored in several high-performance networking environments.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7aedb89 elementor-widget elementor-widget-heading\" data-id=\"7aedb89\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">High-Frequency Trading Networks<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-cfbb957 elementor-widget elementor-widget-text-editor\" data-id=\"cfbb957\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Financial markets were among the earliest adopters.<\/p><p>Organizations connected to\u00a0Nasdaq\u00a0and several London-based hedge funds have investigated HCF links to reduce latency between trading centers.<\/p><p>In high-frequency trading systems, <strong>a single microsecond advantage can translate into millions of dollars in profit<\/strong>.<\/p><p>HCF is currently one of the few cable technologies capable of approaching the speed of microwave communication links while maintaining the reliability of fiber infrastructure.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7f79515 elementor-widget elementor-widget-heading\" data-id=\"7f79515\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">AI and Data Centers<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6412136 elementor-widget elementor-widget-text-editor\" data-id=\"6412136\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Another rapidly emerging use case is AI backend networks inside large data centers. <strong><b>As AI models scale to trillions of parameters, the bottleneck is often no longer compute power, but the interconnect latency between GPU nodes.<\/b><\/strong>\u00a0Modern GPU clusters used for AI training require extremely fast synchronization to handle these massive workloads.<\/p><p>Many of these systems rely on technologies such as RDMA (Remote Direct Memory Access) to exchange data directly between servers. Latency in these backend networks can significantly affect the efficiency of distributed AI training. <strong><b>HCF directly addresses this by accelerating the collective communication patterns essential for distributed training.<\/b><\/strong>\u00a0By reducing signal delay and minimizing optical nonlinearities, HCF has the potential to drastically improve RDMA communication latency in large GPU clusters, making it a cornerstone for next-generation AI infrastructure.<\/p><p>The industry is already moving in this direction. In 2022, Microsoft acquired the hollow core fiber manufacturer Lumenisity. This acquisition aims to explore the integration of HCF technology into Azure cloud infrastructure, particularly for high-speed links between large-scale data centers.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-238bcee elementor-widget elementor-widget-heading\" data-id=\"238bcee\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Telecom Network Experiments<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5264458 elementor-widget elementor-widget-text-editor\" data-id=\"5264458\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Telecommunications companies are also evaluating the technology.<\/p><p>For example,\u00a0BT Group\u00a0and\u00a0Ericsson\u00a0conducted experiments using a <strong>10-kilometer hollow core fiber link<\/strong>\u00a0for 5G backhaul networks.<\/p><p>Their tests showed that reduced latency could potentially extend the effective coverage radius of 5G base stations.<\/p><p>Another experiment came from\u00a0Comcast,\u00a0which deployed a <strong>40-kilometer hollow core fiber link in 2022<\/strong>\u00a0to demonstrate the technology\u2019s feasibility in metropolitan networks.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-af348c9 elementor-widget elementor-widget-heading\" data-id=\"af348c9\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Why Hollow Core Fiber Is Not Widely Used Yet<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-dc3e619 elementor-widget elementor-widget-text-editor\" data-id=\"dc3e619\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Despite its advantages, hollow core fiber has not yet replaced conventional fiber infrastructure. Several challenges remain.<\/p><ul><li><strong><b>Manufacturing Complexity<br \/><\/b><\/strong>The microstructured cladding required for HCF must be manufactured with extremely high precision. Producing these structures consistently over long distances remains technically challenging.<\/li><li><strong style=\"font-size: 16px;\"><b>Higher Cost<br \/><\/b><\/strong>Because production volumes are still relatively small and fabrication is complex, hollow core fiber currently costs significantly more than traditional single-mode fiber.<\/li><li><strong style=\"font-size: 16px;\"><b>Splicing and Connector Challenges<br \/><\/b><\/strong>Conventional connectors and splicing techniques were designed for solid glass fibers. Adapting them for hollow structures requires new manufacturing and installation methods.<\/li><li><strong style=\"font-size: 16px;\"><b>Limited Production Capacity<br \/><\/b><\/strong>Only a small number of manufacturers currently have the capability to produce hollow core fiber at industrial scale.<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2632bdc elementor-widget elementor-widget-heading\" data-id=\"2632bdc\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">The Future of Hollow Core Fiber<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-272812e elementor-widget elementor-widget-text-editor\" data-id=\"272812e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Despite these challenges, hollow core fiber continues to attract strong interest from both academia and industry.<\/p><p>As demand grows for:<\/p><ul><li>ultra-low-latency communication<\/li><li>large-scale AI computing clusters<\/li><li>advanced sensing technologies<\/li><li>high-power laser delivery<\/li><\/ul><p>HCF may become an important component of next-generation optical infrastructure.<\/p><p>Rather than replacing traditional fiber entirely, hollow core technology is likely to play a crucial role in <strong>specialized high-performance networks where latency and signal integrity are critical<\/strong>.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-78a0f7b elementor-widget elementor-widget-heading\" data-id=\"78a0f7b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Frequently Asked Questions<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4b870e4 elementor-widget elementor-widget-n-accordion\" data-id=\"4b870e4\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;default_state&quot;:&quot;expanded&quot;,&quot;max_items_expended&quot;:&quot;one&quot;,&quot;n_accordion_animation_duration&quot;:{&quot;unit&quot;:&quot;ms&quot;,&quot;size&quot;:400,&quot;sizes&quot;:[]}}\" data-widget_type=\"nested-accordion.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"e-n-accordion\" aria-label=\"Accordion. Open links with Enter or Space, close with Escape, and navigate with Arrow Keys\">\n\t\t\t\t\t\t<details id=\"e-n-accordion-item-7910\" class=\"e-n-accordion-item\" open>\n\t\t\t\t<summary class=\"e-n-accordion-item-title\" data-accordion-index=\"1\" tabindex=\"0\" aria-expanded=\"true\" aria-controls=\"e-n-accordion-item-7910\" >\n\t\t\t\t\t<span class='e-n-accordion-item-title-header'><div class=\"e-n-accordion-item-title-text\"> What is the main advantage of hollow core fiber? <\/div><\/span>\n\t\t\t\t\t\t\t<span class='e-n-accordion-item-title-icon'>\n\t\t\t<span class='e-opened' ><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-minus\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h384c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t\t<span class='e-closed'><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-plus\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H272V64c0-17.67-14.33-32-32-32h-32c-17.67 0-32 14.33-32 32v144H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h144v144c0 17.67 14.33 32 32 32h32c17.67 0 32-14.33 32-32V304h144c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" role=\"region\" aria-labelledby=\"e-n-accordion-item-7910\" class=\"elementor-element elementor-element-6e13e0d e-con-full e-flex e-con e-child\" data-id=\"6e13e0d\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-fa79489 elementor-widget elementor-widget-text-editor\" data-id=\"fa79489\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><em>The primary advantage is <strong>low latency<\/strong>. Because light travels through air rather than glass, signals propagate about <strong>46% faster than in traditional silica fiber<\/strong>.<\/em><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t<details id=\"e-n-accordion-item-7911\" class=\"e-n-accordion-item\" >\n\t\t\t\t<summary class=\"e-n-accordion-item-title\" data-accordion-index=\"2\" tabindex=\"-1\" aria-expanded=\"false\" aria-controls=\"e-n-accordion-item-7911\" >\n\t\t\t\t\t<span class='e-n-accordion-item-title-header'><div class=\"e-n-accordion-item-title-text\"> How much latency can hollow core fiber reduce? <\/div><\/span>\n\t\t\t\t\t\t\t<span class='e-n-accordion-item-title-icon'>\n\t\t\t<span class='e-opened' ><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-minus\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h384c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t\t<span class='e-closed'><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-plus\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H272V64c0-17.67-14.33-32-32-32h-32c-17.67 0-32 14.33-32 32v144H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h144v144c0 17.67 14.33 32 32 32h32c17.67 0 32-14.33 32-32V304h144c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" role=\"region\" aria-labelledby=\"e-n-accordion-item-7911\" class=\"elementor-element elementor-element-d9e1f55 e-flex e-con-boxed e-con e-child\" data-id=\"d9e1f55\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-2a9f77d elementor-widget elementor-widget-text-editor\" data-id=\"2a9f77d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><em>Typical latency in standard fiber is around <strong>5 \u03bcs per kilometer<\/strong>, while hollow core fiber reduces this to approximately <strong>3.3 \u03bcs\/km<\/strong>, saving about <strong>1.54 microseconds of round-trip delay per kilometer<\/strong>.<\/em><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t<details id=\"e-n-accordion-item-7912\" class=\"e-n-accordion-item\" >\n\t\t\t\t<summary class=\"e-n-accordion-item-title\" data-accordion-index=\"3\" tabindex=\"-1\" aria-expanded=\"false\" aria-controls=\"e-n-accordion-item-7912\" >\n\t\t\t\t\t<span class='e-n-accordion-item-title-header'><div class=\"e-n-accordion-item-title-text\"> Why are nonlinear effects lower in hollow core fiber? <\/div><\/span>\n\t\t\t\t\t\t\t<span class='e-n-accordion-item-title-icon'>\n\t\t\t<span class='e-opened' ><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-minus\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h384c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t\t<span class='e-closed'><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-plus\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H272V64c0-17.67-14.33-32-32-32h-32c-17.67 0-32 14.33-32 32v144H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h144v144c0 17.67 14.33 32 32 32h32c17.67 0 32-14.33 32-32V304h144c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" role=\"region\" aria-labelledby=\"e-n-accordion-item-7912\" class=\"elementor-element elementor-element-86674ac e-con-full e-flex e-con e-child\" data-id=\"86674ac\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-a4a0895 elementor-widget elementor-widget-text-editor\" data-id=\"a4a0895\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><em>Most nonlinear optical effects occur when light interacts with glass. Since light in HCF travels mainly through air, these effects are <strong>more than 1000 times lower than in conventional single-mode fiber<\/strong>.<\/em><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t<details id=\"e-n-accordion-item-7913\" class=\"e-n-accordion-item\" >\n\t\t\t\t<summary class=\"e-n-accordion-item-title\" data-accordion-index=\"4\" tabindex=\"-1\" aria-expanded=\"false\" aria-controls=\"e-n-accordion-item-7913\" >\n\t\t\t\t\t<span class='e-n-accordion-item-title-header'><div class=\"e-n-accordion-item-title-text\"> Who is developing hollow core fiber technology? <\/div><\/span>\n\t\t\t\t\t\t\t<span class='e-n-accordion-item-title-icon'>\n\t\t\t<span class='e-opened' ><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-minus\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h384c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t\t<span class='e-closed'><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-plus\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H272V64c0-17.67-14.33-32-32-32h-32c-17.67 0-32 14.33-32 32v144H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h144v144c0 17.67 14.33 32 32 32h32c17.67 0 32-14.33 32-32V304h144c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" role=\"region\" aria-labelledby=\"e-n-accordion-item-7913\" class=\"elementor-element elementor-element-b23da34 e-flex e-con-boxed e-con e-child\" data-id=\"b23da34\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-16e74be elementor-widget elementor-widget-text-editor\" data-id=\"16e74be\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><em>Several organizations are actively researching and commercializing the technology, including\u00a0University of Southampton,\u00a0Microsoft, and\u00a0Lumenisity.<\/em><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t<details id=\"e-n-accordion-item-7914\" class=\"e-n-accordion-item\" >\n\t\t\t\t<summary class=\"e-n-accordion-item-title\" data-accordion-index=\"5\" tabindex=\"-1\" aria-expanded=\"false\" aria-controls=\"e-n-accordion-item-7914\" >\n\t\t\t\t\t<span class='e-n-accordion-item-title-header'><div class=\"e-n-accordion-item-title-text\"> Will hollow core fiber replace traditional optical fiber? <\/div><\/span>\n\t\t\t\t\t\t\t<span class='e-n-accordion-item-title-icon'>\n\t\t\t<span class='e-opened' ><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-minus\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h384c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t\t<span class='e-closed'><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-plus\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H272V64c0-17.67-14.33-32-32-32h-32c-17.67 0-32 14.33-32 32v144H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h144v144c0 17.67 14.33 32 32 32h32c17.67 0 32-14.33 32-32V304h144c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" role=\"region\" aria-labelledby=\"e-n-accordion-item-7914\" class=\"elementor-element elementor-element-d3a44cc e-flex e-con-boxed e-con e-child\" data-id=\"d3a44cc\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-96cf831 elementor-widget elementor-widget-text-editor\" data-id=\"96cf831\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><em>Not entirely. While HCF offers major advantages in latency and high-power transmission, traditional fiber remains cheaper and easier to manufacture. Hollow core fiber is expected to complement existing networks rather than fully replace them.<\/em><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Le c\u00e2ble \u00e0 fibre optique hybride int\u00e8gre la transmission optique et la fourniture d'\u00e9nergie \u00e0 distance dans une seule structure unifi\u00e9e. Dans les d\u00e9ploiements distribu\u00e9s de la 5G, de la FTTA et des villes intelligentes, il peut r\u00e9duire le travail d'installation de 30 \u00e0 50%, diminuer les co\u00fbts totaux de d\u00e9ploiement de 20 \u00e0 40% et \u00e9tendre la port\u00e9e de l'alimentation de 100 m\u00e8tres (limite PoE) \u00e0 2 kilom\u00e8tres \u00e0 l'aide de syst\u00e8mes d'alimentation \u00e0 distance de 48 V ou de haute tension. Ce guide explique sa structure, sa logique d'ing\u00e9nierie, ses applications r\u00e9elles, les erreurs de d\u00e9ploiement les plus courantes et la mani\u00e8re de s\u00e9lectionner la taille de conducteur appropri\u00e9e en fonction de la distance et des exigences de charge.<\/p>","protected":false},"author":1,"featured_media":7590,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[26],"tags":[],"class_list":["post-7584","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-professional-insights"],"acf":[],"_links":{"self":[{"href":"https:\/\/yfconnectivity.com\/fr\/wp-json\/wp\/v2\/posts\/7584","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/yfconnectivity.com\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/yfconnectivity.com\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/yfconnectivity.com\/fr\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/yfconnectivity.com\/fr\/wp-json\/wp\/v2\/comments?post=7584"}],"version-history":[{"count":12,"href":"https:\/\/yfconnectivity.com\/fr\/wp-json\/wp\/v2\/posts\/7584\/revisions"}],"predecessor-version":[{"id":7602,"href":"https:\/\/yfconnectivity.com\/fr\/wp-json\/wp\/v2\/posts\/7584\/revisions\/7602"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/yfconnectivity.com\/fr\/wp-json\/wp\/v2\/media\/7590"}],"wp:attachment":[{"href":"https:\/\/yfconnectivity.com\/fr\/wp-json\/wp\/v2\/media?parent=7584"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/yfconnectivity.com\/fr\/wp-json\/wp\/v2\/categories?post=7584"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/yfconnectivity.com\/fr\/wp-json\/wp\/v2\/tags?post=7584"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}