Compensation of Laser Frequency Fluctuations and Phase Noise in 16-QAM Coherent Receivers

IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC

Lugar: New York; Año: 2013 p. 442 - 442

requency fluctuations caused by mechanical vibrations, power supply noise, and other mechanisms are detrimental to the phase estimator performance in high speed intradyne coherent optical receivers. In this work we propose the use of a low-latency parallel digital phase lock loop in combination with common feed-forward carrier phase recovery algorithms in order to compensate both the phase noise and laser frequency fluctuation effects on 16-quadrature amplitude modulation (QAM) receivers. Numerical results demonstrate the excellent behavior of the proposed two-stage carrier recovery scheme.