利用波长检测的光纤温度传感器  

Optical fiber temperature sensor using wavelength detection

作　　者：徐春娇[1] 杨远洪[1] 杨明伟[1] 

机构地区：[1]北京航空航天大学仪器科学与光电工程学院,北京100191

出　　处：《红外与激光工程》2010年第6期1143-1146,共4页Infrared and Laser Engineering

基　　金：国家自然科学基金资助项目(60207012)

摘　　要：基于应力型保偏光纤传输差对温度的敏感性及保偏光纤模式干涉理论,提出了利用波长的温度检测方法并推导出传感方程。传感方程表现出的温度与干涉频谱中对应的空间频率间呈线性关系,简化了温度解算的程序。实验中,对Fabry-Perot(F-P)可调谐滤波器的工作电压与相对应的允许通过波长的关系进行了研究,并使用F-P可调谐滤波器取代光谱仪来获取光谱,简化了实验设备。由于被测信息仅与波长信息有关,而与光在传播过程中所引起的光源光功率的浮动无关,所以,使用这种检测方法消除了光源的浮动以及光在传输过程中的损耗等对系统的稳定性和精度的不利影响,提高了传感器的环境适应能力。A wavelength demodulation technique was proposed based on the polarization mode interference in polarization maintaining optical fiber（PMF）,and the sensing equation was obtained.The temperature linear to the reciprocal of the interference fringe′s period which is defined as space frequency.It simplified the test procedure.In the experiment,the performance of the tunable optical fiber Fabry-Perot filter was demonstrated and the linear relationship between the drive voltage and the permissible wavelength was obtained.The optical spectrum was obtained by the tunable optical Fabry-Perot filter instead of the optical spectrum analyzer.It simplified the experiment equipment.The test method is independent of the power floatation of the light source and just related to the wavelength information.This wavelength demodulation technique overcomes the effect of the light source power fluctuation and the variation of optical loss that occurs in the transmission fiber.The adaptability of optical fiber temperature sensor is enhanced.

关 键 词：温度传感器 波长检测 F-P可调谐滤波器 保偏光纤 干涉 

分 类 号：O433.4[机械工程—光学工程]