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《Laser & Optoelectronics Progress》 2011-04
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Tuning of Extinction Ratio of Optical Interferometer

Miao Kai Liu Bo Lin WeiGuo Peng Wang Weinan(College of Information Technical Science,Nankai University,Tianjin 300071,China)  
The outline of the current ultralong distance optical fiber interferometric sensing system development status,the theoretical analysis of the impact of polarization on the optical fiber sensing system,and a variety of factors which can affect the polarization are given.The squeezetype polarization controller based on photoelastic effect is used to tune the extinction ratio of the system by providing radial stress to fiber interferometer arm,to tune system polarization state dynamically,which makes it possible to molerate the extinction ratio of a longdistance optical fiber sensing system at one point.A novel tuning method to tune the sensitivity of longdistance fiber optic sensing system is proposed,and the range of dynamic extinction ratio of tuning is 0.21~11.03 dB.
【Fund】: 国家大学生创新实验计划(091005514)资助课题
【CateGory Index】: TP212.14
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