Abstract

Carrier phase estimation using information from multiple subchannels and orthogonal polarization channels is proposed and experimentally verified. The concept is evaluated with a 112 Gb/s dual-channel DP-16-QAM system, but may find applications in next generation Terabit systems utilizing superchannels and containing densely packed subchannels originating from the same laser. The new technique requires an accurate carrier frequency estimation algorithm, implemented in the paper using a decision-directed method. The algorithms are tested with a narrow (100 kHz) and a broad (2 MHz) linewidth laser in the coherent receiver.

© 2012 IEEE

Low-complexity and phase noise tolerant carrier phase estimation for dual-polarization 16-QAM systems

Yuliang Gao, Alan Pak Tao Lau, Shuangyi Yan, and Chao Lu
Opt. Express 19(22) 21717-21729 (2011)

Joint estimation of dynamic polarization and carrier phase with pilot-based adaptive equalizer in PDM-64 QAM transmission system

Jiaqian Yang, Eric Sillekens, Wenting Yi, Polina Bayvel, and Robert I. Killey
Opt. Express 29(26) 43136-43147 (2021)

Joint carrier phase and frequency-offset estimation with parallel implementation for dual-polarization coherent receiver

Jianing Lu, Xiang Li, Songnian Fu, Ming Luo, Meng Xiang, Huibin Zhou, Ming Tang, and Deming Liu
Opt. Express 25(5) 5217-5231 (2017)

Joint mitigation of laser phase noise and fiber nonlinearity for polarization-multiplexed QPSK and 16-QAM coherent transmission systems

Mohamed Morsy-Osman, Qunbi Zhuge, Lawrence R. Chen, and David V. Plant
Opt. Express 19(26) B329-B336 (2011)

Joint digital signal processing for superchannel coherent optical communication systems

Cheng Liu, Jie Pan, Thomas Detwiler, Andrew Stark, Yu-Ting Hsueh, Gee-Kung Chang, and Stephen E. Ralph
Opt. Express 21(7) 8342-8356 (2013)