14 November 2016 A study on frequency-shifted pulse light stability control for DP-MZM in coherent-OTDR
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Abstract
In digital coherent optical time domain reflectometer (coherent-OTDR) system, a dual-parallel Mach-Zehnder modulator (DP-MZM) is employed to modulate the signal light and to generate frequency-shifted pulse light. However, the environment temperature strongly influent the stability of the DP-MZM. To stabilize the quality of the frequency-shifted pulse light, we proposed a bias control method to keep the modulator at the optimum bias. This bias control method search for the optimum bias by changing three bias voltages at the same time based on chaotic particle swarm optimization algorithm(PSO). The experimental results show obvious effect on locating the optimum bias voltages for the DP-MZM.
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Wenjie Chen, Wenjie Chen, Junfeng Jiang, Junfeng Jiang, Kun Liu, Kun Liu, Zhe Ma, Zhe Ma, Shuang Wang, Shuang Wang, Xuezhi Zhang, Xuezhi Zhang, Zhenyang Ding, Zhenyang Ding, Tiegen Liu, Tiegen Liu, } "A study on frequency-shifted pulse light stability control for DP-MZM in coherent-OTDR", Proc. SPIE 10025, Advanced Sensor Systems and Applications VII, 100250D (14 November 2016); doi: 10.1117/12.2247765; https://doi.org/10.1117/12.2247765
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