Acta Optica Sinica, Volume. 30, Issue 6, 1566(2010)
Experimental Research on Interferometric Fiber-Optic Sensing System with Polarization Diversity Receiver
Aiming at polarization-induced signal fading phenomenon generally existing in interferometric fiber-optic sensor,the principle of polarization diversity receiver (PDR) is theoretically introduced and demonstrated by simulation. Experimental sensing system of fiber-optic Michelson interferometer based on phase generated carrier (PGC) is designed and set up. An all-fiber tri-cell polarization diversity receiver is designed to receive the signal from the sensing system. The demodulated signal is in good accordance with the simulation signal produced by a piezoelectric phase modulator in one arm of the interferometer. The fringe visibilities obtained from the three output-channels of PDR are observed with the polarization state of the interferometer changed by twisting the fiber of the interferometer. The relationship of the signal stability,self-noise of the system,and fringe visibility are obtained. The results show that polarization-induced signal fading can be inhibited by selecting an output-channel of PDR with the fringe visibility higher than 0.5.
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Wang Xiao, Zhang Xueliang, Hu Zhengliang, Cao Chunyan, Hu Yongming. Experimental Research on Interferometric Fiber-Optic Sensing System with Polarization Diversity Receiver[J]. Acta Optica Sinica, 2010, 30(6): 1566
Category: Fiber Optics and Optical Communications
Received: Aug. 17, 2009
Accepted: --
Published Online: Jun. 7, 2010
The Author Email: Xiao Wang (E-mail;w_-_x@163.com)