Chinese Optics Letters, Volume. 14, Issue 11, 110601(2016)
Decision-free radius-directed Kalman filter for universal polarization demultiplexing of square M-QAM and hybrid QAM signals
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Fig. 1. Block diagram for the proposed polarization demultiplexing and tracking algorithm.
Fig. 2. Constellation diagrams of before demultiplexing, after demultiplexing, and carrier phase recovery for (a) PDM-QPSK, (b) PDM-16QAM, (c) PDM-64QAM, and (d) PDM-hybrid-QPSK/16QAM (red line is the targeted circle).
Fig. 3. BER vs. polarization rotation angular frequency with different
Fig. 4. Simulated BER versus OSNR for the 112 Gb/s PDM-QPSK (28 GB), PDM-16QAM (14 GB), and THDQ signals (QPSK/16QAM) with the proposed universal polarization methods. The 16QAM results with the methods proposed in Ref. [15] are also presented for comparison.
Fig. 5. Simulated OSNR penalty vs. polarization rotation angular frequency for 112 Gb/s PDM-QPSK and PDM-16QAM.
Fig. 6. Experimental scheme and digital processing of the 112 Gb/s PDM-QPSK/PDM-16QAM coherent optical communication system.
Fig. 7.
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Yanfu Yang, Qun Zhang, Yong Yao, Guoliang Cao, Kangping Zhong, Xian Zhou, Alan Pak Tao Lau, Chao Lu, "Decision-free radius-directed Kalman filter for universal polarization demultiplexing of square M-QAM and hybrid QAM signals," Chin. Opt. Lett. 14, 110601 (2016)
Paper Information
Category: Fiber Optics and Optical Communications
Received: May. 18, 2016
Accepted: Sep. 9, 2016
Published Online: Aug. 2, 2018
The Author Email: Yong Yao (yaoyong@hit.edu.cn)
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