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HUBER+SUHNER strengthens collaboration with Microsoft to advance global deployment of Hollow Core Fiber connectivity in the Microsoft Azure network

HUBER+SUHNER AG / Key word(s): Miscellaneous
HUBER+SUHNER strengthens collaboration with Microsoft to advance global deployment of Hollow Core Fiber connectivity in the Microsoft Azure network

21.04.2026 / 08:30 CET/CEST

21.04.2026

HUBER+SUHNER today announced a strengthening of its close collaboration with Microsoft Azure Fiber with further planned investments in its production capabilities to accelerate the rollout of Hollow Core Fiber (HCF) cable and connectivity solutions supporting cloud and artificial intelligence (AI) infrastructure. As part of the cooperation, HUBER+SUHNER expects progressive growth in manufacturing volumes as Microsoft deploys HCF across more Azure regions.

<div><span><span><span style="vertical-align: middle;">Since 2017, HUBER+SUHNER has worked closely with the Azure team in Romsey, UK, (formerly the University of Southampton spin-out Lumenisity), to develop and manufacture innovative HCF cable and connector solutions. These solutions are already deployed in the Azure network, with higher-capacity variants under development to support Microsoft’s future scaling of its HCF</span><span style="vertical-align: middle;">‑</span><span style="vertical-align: middle;">enhanced cloud infrastructure.</span></span></span> <p style="vertical-align: middle;"><br/><span><span><span style="vertical-align: middle;">HUBER+SUHNER and Microsoft have developed and qualified a series of ruggedized </span><a href="https://eqs-cockpit.com/cgi-bin/fncls.ssp?fn=redirect&url=3b15f9632a7ed2ad0a395ed2dae84165&application_id=2311638&site_id=borse_frankfurt~~~61bfc866-a7f4-45b8-a35e-3b17b6c7ebc2&application_name=news" style="text-decoration: underline;">outside plant (OSP) and inside plant (ISP) cable solutions</a><span style="vertical-align: middle;">, certified for field deployments. In parallel, the collaboration is progressing its next-generation, higher-density HCF cable designs to support future Azure network requirements. At the HUBER+SUHNER manufacturing plant in Herisau, Switzerland, special processes have been established to integrate HCF into stranded multi-fiber loose-tube (MLT) cables, with capacity to grow as Microsoft’s ecosystem collaborators </span><a href="https://eqs-cockpit.com/cgi-bin/fncls.ssp?fn=redirect&url=1c8bc6bf39122fdd72a8d90e05f1d292&application_id=2311638&site_id=borse_frankfurt~~~61bfc866-a7f4-45b8-a35e-3b17b6c7ebc2&application_name=news" style="text-decoration: underline;">expand fiber manufacturing at scale</a><span style="vertical-align: middle;">.</span><br/><br/><span style="vertical-align: middle;">Additionally, HUBER+SUHNER has created an innovative mode</span><span style="vertical-align: middle;">‑</span><span style="vertical-align: middle;">converting HCF connector specifically engineered for the demands of hyperscale and metro</span><span style="vertical-align: middle;">‑</span><span style="vertical-align: middle;">optical environments. These patented HCF connectors are in series production at HUBER+SUHNER’s Cube Optics facility in Mainz, Germany, and the company is investing to further scale manufacturing capacity to meet accelerating demand. With qualified designs in both HCF cables and connectors, HUBER+SUHNER is now extending its HCF product portfolio to enable fully integrated, end</span><span style="vertical-align: middle;">‑</span><span style="vertical-align: middle;">to</span><span style="vertical-align: middle;">‑</span><span style="vertical-align: middle;">end connectivity solutions.</span><br/><br/><span style="vertical-align: middle;"><strong>Long-standing collaboration</strong></span><br/><span style="vertical-align: middle;">“HUBER+SUHNER is proud to support Microsoft as HCF connectivity solutions move to deployment at scale. Building on our foundations of innovation and quality, we can expect further advances in our HCF connectivity portfolio as the pace of adoption accelerates,” said Jürgen Walter, COO Communication Segment at HUBER+SUHNER. “Together, we look forward to shaping the future of cloud connectivity and unlocking the full potential of HCF.”</span><br/><br/><span style="vertical-align: middle;">“We value our long-standing collaboration with HUBER+SUHNER, which has helped us transition HCF technology from advanced research into operational deployment in the Microsoft Azure network,” said Colin Wallace, GM Cloud Network Engineering, Microsoft Azure. “These HCF cable and connector technologies are already deployed and carrying live traffic over Azure HCF links today, and this integrated capability will help us rapidly co-design and scale connectivity solutions for the future of cloud and AI network infrastructure.”</span><br/><br/><span style="vertical-align: middle;"><strong>Why HCF matters</strong></span><br/><span style="vertical-align: middle;">The performance of optical networks has the potential to be transformed by HCF. By guiding light in air rather than glass, data is transmitted 47% faster, enabling low-latency communications both within and between data centers (DCs).</span><br/><br/><span style="vertical-align: middle;">Microsoft’s Double-Nested Anti-Resonant Nodeless Fiber (DNANF) achieves </span><a href="https://eqs-cockpit.com/cgi-bin/fncls.ssp?fn=redirect&url=fb9f1c4b7b6e58cd12191d0901b44fd6&application_id=2311638&site_id=borse_frankfurt~~~61bfc866-a7f4-45b8-a35e-3b17b6c7ebc2&application_name=news" style="text-decoration: underline;">record-low loss</a><span style="vertical-align: middle;"> and far greater launch powers than are possible with standard solid-glass single-mode fiber (SMF), reducing or eliminating the need for optical amplification in metro-scale networks.</span><br/><br/><span style="vertical-align: middle;">Deployment of an all-HCF network delivers significant business benefits for next</span><span style="vertical-align: middle;">‑</span><span style="vertical-align: middle;">generation DCs, including greater location flexibility to minimize energy and real-estate costs; and improved efficiency of distributed AI training by reducing latency across compute clusters.</span><br/><br/><span style="vertical-align: middle;"><strong>Meeting the connectivity challenges of HCF</strong></span><br/><span style="vertical-align: middle;">Several practical challenges need to be overcome to enable widespread deployment of HCF. In addition to robust HCF cable designs that preserve low-loss transmission characteristics, termination solutions are needed that can protect the HCF end-face and interface seamlessly with existing SMF infrastructure and equipment to make it easy to build and maintain end-to-end communication systems at scale.</span><br/><br/><span style="vertical-align: middle;">HUBER+SUHNER’s high-performance HCF connectors transform light in the HCF core to industry-standard SMF LC/UPC and LC/APC connector interfaces with low loss and low back-reflection, while sealing the fragile hollow core microstructure against environmental contamination. Designed to withstand high optical launch powers, the HUBER+SUHNER HCF connector facilitates simple installation and commissioning of HCF transmission systems.</span></span></span><br/>  </p>

HUBER+SUHNER AG
Christiane Jelinek
Chief Communications Officer
Tumbelenstrasse 20
8330 Pfäffikon ZH
Switzerland

+41 44 952 25 60
pressoffice@hubersuhner.com
hubersuhner.com


End of Media Release
View original content: EQS News

Language: English
Company: HUBER+SUHNER AG
Tumbelenstrasse 20
8330 Pfäffikon ZH
Switzerland
Internet: www.hubersuhner.com
ISIN: CH0030380734
Valor: 3038073
Listed: SIX Swiss Exchange
EQS News ID: 2311638

 
End of News EQS News Service

2311638  21.04.2026 CET/CEST