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Study of a Birefringence-banlance Optical Fibor Sensor

Lv Ling;Dong Shenglong;Huang Dengshan (Dept. of Electronic Engineering, North western Polytechnical Univ. Xi'an, 710072)  
A birefringence-balance polarimetric optical-fiber temperature sensor is proposed and demonstrated. The system measures the character of temperation by test polarization state. Two singlecrystal sapphire flat serves as the sensing iement, which can withstand temperatures over 2000℃. Two single-crystal sapphire crystals are incorporated into the sensor head. They are connected end to end in such a way that the slow axis of the first crystal is aligned with the fast axis of the second crystal. By computer simulation, accurancity of the system up to 0. 35%.
【CateGory Index】: TP212
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