Specialty Optical Fibers Handbook

8.2.6 EDFA Pump Combiners, Reflection-

Suppression Schemes, Current Sensing,

and Optical Coherence Tomography

The use of PM fiber to enable the flexible and remote delivery of polarized light

extends to a variety of other applications across the full spectrum of industries.

Developments in telecommunications systems’ architectures over the last 5 years

have demanded ever increasing power outputs from EDFAs that, in some designs,

have been achieved through the polarization multiplexing of 980- or 1480-nm

pump diodes. Similarly, pump diodes have also been pigtailed in PM fiber to

enable polarization-based schemes for the suppression of back-reflection. In

sensing, the Faraday effect current sensor [10] is experiencing something of a

renaissance. As a