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�������պ����ѧѧ�� 2006, Vol. 32 Issue (11) :1362-1364    DOI:
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Reflection polarization maintaining optical fiber temperature sensor
Yang Yuanhong, Liu Bo, Li Li*
School of Instrument Science and Opto-electronics Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China

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Abstract�� A reflection polarization maintain optical fiber temperature sensor was proposed based on the polarization mode interference theory in polarization maintain optical fiber and the sensing equation was derived. Analyses prove this sensor can achieves high accuracy and the measurement range can be adjusted easily by changing the polarization maintaining optical fiber sense probe length. For the demand of field temperature monitoring of huge power transformers, a prototype with special high temperature polarization maintain optical fiber sensing probe and sealed package was made and the sensor probe can stand the harsh environment of hot oil and high voltage. With this prototype, the temperature within range 0��~180�� was measured and the linear output was obtained after model linearized and date processed. Long time measurement was investigated in 0�� environment formed with mixer of ice and water, the result shows the sensor stability and accuracy were both better than 0.15��.
Keywords�� temperature sensor   fiber optic   polarization interference   temperature monitoring     
Received 2006-04-30;
Fund:

�����������˲�֧�ּƻ�������Ŀ(NECT-05-0183); ������Ȼ����������Ŀ(60207002)

About author: ��Զ��(1969-),��,�����人��,����,yhyang@buaa.edu.cn.
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��Զ��, ����, ����.�����ͱ�ƫ�����¶ȴ�����[J]  �������պ����ѧѧ��, 2006,V32(11): 1362-1364
Yang Yuanhong, Liu Bo, Li Li.Reflection polarization maintaining optical fiber temperature sensor[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2006,V32(11): 1362-1364
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http://bhxb.buaa.edu.cn//CN/     ��     http://bhxb.buaa.edu.cn//CN/Y2006/V32/I11/1362
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