Comcast becomes the first ISP in the United States to deploy advanced hollow-core fiber with faster speed and lower latency


PHILADELPHIA CREAM–(BUSINESS WIRE)–Comcast, the nation’s largest high-speed Internet provider, today announced what is believed to be the world’s first-ever end-to-end deployment of advanced “hollow” optical fiber. by an Internet service provider. Hollow core fibers offer significantly lower latency than traditional fibers and over time will provide essential performance attributes. These fibers will help fuel The Comcast Network and support delivery of multi-gigabit speeds over 10G.

Unlike traditional fibers, in which laser light travels over a solid glass core, hollow-core fibers are hollow on the inside with air-filled channels. Since light travels nearly 50% faster in air than in glass, data travels approximately 150% faster with up to 33% lower latency through hollow fiber compared to traditional fiber . The faster lightspeed can be used to double the range of latency-critical applications or can accelerate transaction rates by approximately 47%. For the deployment announced today, Comcast worked with hollow fiber cable solutions provider, Brightness.

“Hollowcore fiber represents a leap forward in how we deliver ultra-fast, ultra-low latency, and ultra-reliable services to customers,” said Elad Nafshi, executive vice president and chief network officer, Comcast Cable. . “As we continue to develop and deploy technology to deliver 10G and multi-gigabit performance to tens of millions of homes, hollow-core fiber will help ensure that the network that powers these experiences is among the most advanced and performers in the world.”

Comcast has connected two sites in Philadelphia, allowing network engineers to continue testing and observing the performance and physical compatibility of hollow fiber in an actual deployment. This hybrid deployment of 40 kilometers of hollow and traditional fiber is considered the longest in the world by an Internet service provider. Comcast has successfully tested bi-directional transmission (upstream and downstream traffic flowing over a single fiber), used coherent and direct-sensing systems (allowing forward and reverse technology compatibility), and produced traffic rates ranging from 10 gigabits per second (Gbps) to 400 Gbps all simultaneously over a single strand of hollow core fiber.

“We are proud to be working with Comcast on next-generation hollow-core fiber, which we believe opens up exciting new potential for connectivity around the world,” said David Parker, executive chairman of Lumenisity.

Hollowcore fiber will help power the next generation of ultra-low latency technologies to support network virtualization, telemedicine, augmented and virtual reality, and other emerging services. Going forward, Comcast is exploring opportunities to strategically deploy hollow-core fiber in select core and access network deployments. From 2017 to 2021, Comcast added more than 50,000 new miles of fiber to its network and is actively building more fiber in cities and towns across the United States.

Comcast’s ongoing work to expand and scale its fiber deployments — including this groundbreaking advancement with hollow-core fiber — is helping propel Comcast 10G evolution underwaythat will deliver reliable multi-gigabit upload and download speeds over connections already installed in tens of millions of homes and businesses.

About Comcast Corporation

Comcast Corporation (Nasdaq: CMCSA) is a global media and technology company that connects people in the moments that matter. We are primarily focused on broadband, aggregation and streaming with 57 million customer relationships in the US and Europe. We provide broadband, wireless and video through our Xfinity, Comcast Business and Sky brands; create, distribute and broadcast premier entertainment, sports and news through Universal Filmed Entertainment Group, Universal Studio Group, Sky Studios, NBC and Telemundo broadcast networks, multiple cable networks, Peacock, NBCUniversal News Group, NBC Sports, Sky News and Sky Sports; and deliver memorable experiences at Universal Parks and Resorts in the United States and Asia. To visit for more information.


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