Research uncovers impairments in high-bandwidth fiber transmission networks

Research conducted by Fujitsu and Indiana University has detected some previously unseen glitches in fiber optic networks that could impair their ability to deliver ultra-rich broadband loads of 40 to 100 Gbps, the pair said in a news release.

According to the research, Polarization Dependent Loss (PDL) in fiber, which had been thought to be a minor impairment, "can actually have a significant effect on 40 Gbps and 100 Gbps transmission capability," the release said. Most carriers are either now using, or will shortly use fiber networks to deliver high-speed and bandwidth rich content that will be affected by this unforeseen impairment.

The university gave Fujitsu access to buried and aerial fibers to measure PDL in "a real-world setting" and establish a conclusion that "confirms the existent of Polarization Dependent Splice Loss (PDSL) ... and overall fiber connection loss to PDL," the two said.

For more:
- see this news release

Related articles:
XO launches nationwide 40 Gbps service
CenturyLink catches the 40 Gbps service wave

Suggested Articles

For now, it looks like Netflix and everyone else still have space to grow.

Flex, which Comcast recently made free for its subscribers, is a lot like X1 but not centered on Comcast’s linear video product.

Beginning Dec. 10, Comcast will replace Starz and begin offering Epix, a premium network owned by MGM, in some of its Xfinity TV premium packages.