The Research of Polarization Feedback Control System Based on Double Mach-Zehnder Interferometer

Abstract:

Polarization induced signal fading always has an influence up on the visibility of the interference stripe and the accuracy of system location in the distributed optical fiber oil &gas pipeline leak detection system. Base on distributed sensor system polarization characteristic, this paper analyses the visibility of the interference stripe with the changing of polarization. Designed a feedback control system based on double Mach-Zehnder is used to eliminate the input light polarization fading. This system can effectively suppress the polarization fading in fiber optical sensor, making interferometer fringe visibility tends to 1 and the equilibrium state of input light polarization always closes to the best input sate of interferometer.

• Periodical: Advanced Materials Research (Volumes 308-310)
• Pages: 1751-1754
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.308-310.1751
• Online since: August 2011
• Authors: Yu Tian Wang, Rui Rong Yuan, Shu Tao Wang, Xue Gao, Xue Li
• Keywords: Double Mach - Zehnder Interferometer, Feedback Control, Fiber Optical Sensor, Polarization Fading

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