[TuB2] DSP-related Techniques

[TuB2-4] Polarization Change Monitor Based on Jointly Applied Constant Modulus Algorithm and Carrier Phase Recovery in Coherent Receiver

〇Yanhui Qi¹, Tong Ye¹, Yangyang Fan¹, Zhenning Tao¹, Guoxiu Huang², Hisao Nakashima³, Takeshi Hoshida³ (¹Fujitsu R&D Center, China, ²Fujitsu Laboratories Ltd., Japan, ³Fujitsu Limited, Japan)

Keywords:Fiber optics and optical communications, Coherent communications

The coefficient of adaptive equalizer could monitor the channel response, such as fiber link polarization change. We experimentally shown that the estimated carrier phase should also be included, if the equalizer uses constant modulus algorithm.