Accession Number : ADP008152

Title :   Fast Automatic Polarization Control System,

Corporate Author : AT AND T BELL LABS HOLMDEL NJ

Personal Author(s) : Heismann, F. ; Whalen, M. S.

Report Date : APR 1992

Pagination or Media Count : 2

Abstract : Automatic polarization controllers are of great interest for fiberoptic communication systems to compensate for the random polarization fluctuations in standard optical fibers, thus allowing the use of polarization-dependent components, such as coherent optical receivers, high-speed modulators, or photonic switches. Here, one requires polarization controllers with effectively endless transformation ranges and control speeds of the order of 1000 rad/sec to continuously track the large and rapid changes in the optical phase retardation of the fiber. Previous systems for endless polarization control have not exceeded speeds of 50 rad/sec, limited by the slow response of mechanical actuators and complicated drive algorithms.

Descriptors :   *OPTICAL COMMUNICATIONS, *SYMPOSIA, *OPTICAL CIRCUITS, ACTUATORS, ALGORITHMS, CONTROL, PHASE, PHOTONICS, POLARIZATION, RESPONSE, RETARDATION, TRANSFORMATIONS, FIBER OPTICS, OPTICAL EQUIPMENT, LIGHT MODULATORS.

Subject Categories : Fiber Optics and Integrated Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE