APD-BASED INTERFERENCE DETECTORS YIELD 7-dB DYNAMIC RANGE OF 70-krad/s PDM-DPSK ENDLESS POLARIZATION DEMULTIPLEXER

摘要

Fast optical tracking and demultiplexing of DPSK/DQPSK/QAM polarization channels was hitherto limited to a fairly fixed optical input power. With APD photoreceivers used for residual interference detection, we demonstrate a 7...9-dB optical level tolerance.