dark fiber


Also found in: Dictionary, Thesaurus, Medical, Legal, Wikipedia.

dark fiber

(1) Also known as "unlit fiber," it is optical fiber that is laid in the ground, but not used. During the late 1990s, so much fiber had been installed worldwide in anticipation of Internet demand that there is still a huge amount of fiber that has never been lit. The projected demand has also been curbed by the improvements in WDM technology, which allows more channels to be transmitted in a single fiber strand. Contrast with lit fiber.

(2) Optical fibers that are installed and sold to carriers and large businesses without any optical or electronic signaling in their path. The customer is responsible for adding the transmission system at both ends. See TONS.
References in periodicals archive ?
Key Facts: Eastern Lights strategically chosen long-haul dark fiber routes in the Nordic region will provide local and global operators, global cloud operators and ICPs with improved security, reliability, and network diversity.
NYSE: ZAYO) for a dark fiber solution to provide additional capacity to support its data center growth in the Midwest, the company said.
Banks and financial services companies are increasingly turning to dark fiber for their bandwidth-intensive core transport, including file sharing, large file transfers, business intelligence applications and data analysis.
Dark fiber provider Light Source Communications has launched a new intercity dark fiber route in Georgia, the company said.
USA FIBER is a purpose built, high capacity, dark fiber network provider.
President and co-founder of USA Fiber, Judd Carothers, announced the company would be focusing on building key routes that enable its customers to connect simply and reach their clients, infrastructures or applications with improved speed, latency and uptime they will hone their focus by building new dark fiber networks on a massive scale.
Zayo, a provider of bandwidth, colocation and dark fiber infrastructure services, has signed a multi-year agreement with Denver-based PeakColo.
In this case, our long-standing customer continues to experience increasing demand and needed to increase their dark fiber capacity connecting key markets, said Annette Murphy, managing director, Europe at Zayo.
NYSE: ZAYO) for long haul and metro dark fiber, the company said.
The acquired network and colocation assets consist of a contiguous dark fiber (privately owned optical fibre) network, constructed along secure private right-of-ways, that extends from Atlanta, Georgia to Miami, Florida including interconnection to key data centers in both markets and strategic access points in between.
USA Fiber said it has announced a new unique dark fiber build connecting Ashburn to Baltimore that creates a new fiber crossing the Potomac River, uniquely underground and bypassing Washington DC.
CableRunner North America, LLC, announced that its sister company, WKA/CableRunner Austria, has acquired Global Metro Networks' Austrian operations including a 92-km dark fiber ring in Vienna, Austria.