{"id":42948,"date":"2025-09-01T17:26:08","date_gmt":"2025-09-01T16:26:08","guid":{"rendered":"https:\/\/www.ispreview.co.uk\/?p=42948"},"modified":"2025-09-01T17:28:51","modified_gmt":"2025-09-01T16:28:51","slug":"microsoft-backed-researchers-significantly-improve-hollow-core-fibre-cables","status":"publish","type":"post","link":"https:\/\/www.ispreview.co.uk\/index.php\/2025\/09\/microsoft-backed-researchers-significantly-improve-hollow-core-fibre-cables.html","title":{"rendered":"Microsoft Backed Researchers Significantly Improve Hollow Core Fibre Cables"},"content":{"rendered":"

A team of Microsoft backed and largely UK based researches, which were originally part of Lumenisity<\/a> – a spinoff from the Optoelectronics Research Centre (ORC) at the University of Southampton, appear to have succeeded in reducing attenuation and other signal degradation phenomena in next gen hollow core fibre (HCF) broadband cables – boosting speeds by 45%.<\/p>\n

Conventional optical fibre cables work by guiding laser light through solid glass cores, which need to be extremely transparent in order to avoid signal loss. But even the clearest of fibres can still suffer a slight loss over distance, although researchers have long been refining a possible alternative for the future.<\/p>\n

NOTE:<\/strong> Light travels through HCF about 47% faster than standard silica glass.<\/div>\n

By comparison, HCF cables have an air-filled central core (i.e. light travels faster through the air than glass), with an outer ring of glass to help guide the beam, which helps to resolve some of the aforementioned issues \u2013 improving data speeds and latency. BT<\/a> trialled one such solution back in 2021 (here<\/a>), but the technology still had some issues with the signal losing too much power.<\/p>\n

Modern solid core fibres typically deliver a minimum loss of 0.14 decibels per kilometre (0.14\u2009dB\u2009km-1), but the researchers were able to improve their alternative HCF solution to deliver “unprecedented transmission bandwidth and attenuation, with a measured loss of 0.091\u2009dB\u2009km-1<\/em>“. According to The Register<\/a>, this marks a big improvement, as past HCF solutions delivered a measured loss of more like 1 dB km-1, and you thus don’t need to amplify the signal as much.<\/p>\n

Extract from the Paper (Nature)<\/strong><\/a><\/p>\n

A critical component of optical communications is the availability of a suitable waveguide technology for the transport of electromagnetic waves with low loss over a broad spectral range. In the past four decades, despite extensive research, the attenuation and spectral bandwidth of silica-based optical fibres have remained relatively unchanged, with state-of-the-art fibres offering values of 0.14\u2009dB\u2009km\u22121 and 26\u2009THz below 0.2\u2009dB\u2009km\u22121, respectively.<\/p>\n

Here we report a microstructured optical waveguide with unprecedented transmission bandwidth and attenuation, with a measured loss of 0.091\u2009dB\u2009km\u22121 at 1,550\u2009nm that remains below 0.2\u2009dB\u2009km\u22121 over a window of 66\u2009THz. Instead of a traditional solid glass core, this innovative optical fibre features a core of air surrounded by a meticulously engineered glass microstructure to guide light. This approach not only reduces attenuation and other signal degradation phenomena, but it also increases transmission speeds by 45%.<\/p>\n

Furthermore, the approach theoretically supports further loss reductions and operation at wavelengths where broader bandwidth amplifiers exist, potentially heralding a new era in long-distance communications as well as remote delivery of laser beams.<\/p><\/blockquote>\n

All of this sounds good, although it’s worth pointing out that HCF cables aren\u2019t going to be used to replace all of today\u2019s optical fibres \u2013 at least not for many decades (if ever) \u2013 because we aren\u2019t even close to maximising the capability of existing solid core fibres. But HCF cables could be more widely deployed as part of new core network links, or for providing backhaul style capacity over longer distances etc.<\/p>\n

Microsoft is a data behemoth, and thus their interest in this field is clear to understand.<\/p>\n","protected":false},"excerpt":{"rendered":"

A team of Microsoft backed and largely UK based researches, which were originally part of Lumenisity – a spinoff from the Optoelectronics Research Centre (ORC) at the University of Southampton, appear to have succeeded in reducing attenuation and other signal degradation phenomena in next gen hollow core fibre (HCF) broadband cables – boosting speeds by […]<\/p>\n","protected":false},"author":1,"featured_media":24235,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"ngg_post_thumbnail":0,"footnotes":""},"categories":[1],"tags":[52,477],"class_list":["post-42948","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uk_isp_news","tag-fibre-optic","tag-science"],"share_on_mastodon":{"url":"https:\/\/mastodon.social\/@ispreview\/115129979515476850","error":""},"yoast_head":"\nMicrosoft Backed Researchers Significantly Improve Hollow Core Fibre Cables - ISPreview UK<\/title>\n<meta name=\"description\" content=\"A team of Microsoft backed and largely UK based researches, which were originally part of Lumenisity - 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