A study on frequency-shifted pulse light stability control for DP-MZM in coherent-OTDR

Wenjie Chen; Junfeng Jiang; Kun Liu; Zhe Ma; Shuang Wang; Xuezhi Zhang; Zhenyang Ding; Tiegen Liu

doi:10.1117/12.2247765

14 November 2016 A study on frequency-shifted pulse light stability control for DP-MZM in coherent-OTDR

Wenjie Chen, Junfeng Jiang, Kun Liu, Zhe Ma, Shuang Wang, Xuezhi Zhang, Zhenyang Ding, Tiegen Liu

Author Affiliations +

Proceedings Volume 10025, Advanced Sensor Systems and Applications VII; 100250D (2016) https://doi.org/10.1117/12.2247765
Event: SPIE/COS Photonics Asia, 2016, Beijing, China

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, Junfeng Jiang, Kun Liu, Zhe Ma, Shuang Wang, Xuezhi Zhang, Zhenyang Ding, and 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); https://doi.org/10.1117/12.2247765

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