29 August 2013 Stability control of the polarization switching
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Proceedings Volume 8914, International Symposium on Photoelectronic Detection and Imaging 2013: Fiber Optic Sensors and Optical Coherence Tomography; 891410 (2013) https://doi.org/10.1117/12.2034547
Event: ISPDI 2013 - Fifth International Symposium on Photoelectronic Detection and Imaging, 2013, Beijing, China
Abstract
Pulse polarization switching is an important new method to eliminate the polarization-induced fading (PIF) in the interferometric fiber sensing system. An integrated Ti-indiffused LiNbO3 Mach–Zehnder modulator is used to achieve high-speed switch of the polarization state by switching the voltage between two appropriate voltages applied to the modulator. The stability of the polarization switching is affected by environmental factors, especially the temperature. In this paper, the stability of the polarization switching is studied. Firstly, the structure of the modulator and the principle of the polarization switching are introduced. Secondly, a feedback control method to overcome the switch instability is proposed. The output polarization state could be obtained by monitoring the intensity of the output light. Finally, the high-speed and high-accuracy stable switching between two orthogonal polarization states is realized using this method and experimentally demonstrated.
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Xiaobing Yin, Xiaobing Yin, Huizu Lin, Huizu Lin, Zhengliang Hu, Zhengliang Hu, Yongming Hu, Yongming Hu, } "Stability control of the polarization switching", Proc. SPIE 8914, International Symposium on Photoelectronic Detection and Imaging 2013: Fiber Optic Sensors and Optical Coherence Tomography, 891410 (29 August 2013); doi: 10.1117/12.2034547; https://doi.org/10.1117/12.2034547
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