en
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z 0-9

To add favorites to a list, you must be logged in to your account.

Login Register

Fiber characterization for 100G and beyond

Making sure your fiber plant is future-proof

Most of the fiber currently installed in data centers and outside plants was tested and characterized for 10 Gbit/s signals—which was considered high speed at the time. Now the same fiber plants are expected to carry 100 Gbit/s, and possibly 400 Gbit/s, which poses a problem in many cases. These higher-speed signals are more susceptible to fiber impairments such as reflectance and insertion loss, which may not have been noticeable at 10 Gbit/s—especially for intra-data center applications.

Insertion loss and optical return loss are typically measured with an optical loss test set (OLTS), while reflectance requires an optical time-domain reflectometer (OTDR). Though OTDR tests provide more detailed information (including reflectance), they typically take 15–35 seconds wheras an OLTS test can be done in under 5 seconds. In large fiber count situations, like a data center upgrade, this difference can mean days on an overall schedule.

Choosing the right tests is a matter of managing risk—i.e., thoroughness of testing versus time to complete.

Suggested reading

Application notes
Transforming from 100GE to 400GE: objectives, differences and new physical interfaces (May 24, 2018)
Application notes
Best practices and requirements for data center interconnect test orchestration (March 15, 2018)
Application notes
Touching on Failure: Sources of Fiber-Optic Network Issues in the Data Center (March 15, 2018)
Application notes
Understanding the Basics of Mobile Fronthaul Technology (March 15, 2018)
Case studies
Tier 1 MNO C-RAN Field Trial (March 15, 2018)
Case studies
Global Data Center Operator Faced with 100G deployment scale-up (March 15, 2018)
Case studies
Tier-1 Data Center Plans Next-generation Network while Optimizing Current Infrastructure (March 15, 2018)
White papers
Fiber Guardian monitoring solution: a return on investment analysis (March 26, 2018)
White papers
How multifiber push-on connectors can be a data center’s best friend (May 24, 2018)
White papers
Data center optics at the heart of the hyperdata world (November 26, 2018)
White papers
Intra-data center 100G migration (March 15, 2018)
White papers
Why C-RAN deployments will give you more headaches than D-RAN rollouts (March 15, 2018)
White papers
The path to 5G requires a strong optical network (March 15, 2018)
Flyers and pamphlets
4 totally avoidable multifiber connector mistakes (March 2, 2018)
Product demos
Multifiber connector inspection the EXFO way (April 25, 2018)
Webinars
Remote testing and monitoring to boost fronthaul and C-RAN efficiencies (April 9, 2018)