多通道自校准砷化镓吸收式光纤温度监测系统  

Multi-Channels Self-Calibrating Gallium Arsenide Absorption Fiber Optic Temperature Monitoring System

作　　者：胡昆[1,2] 傅惠南[1] 罗星星[1,2] 梅迎春[1] 董玉明[2,3] 

机构地区：[1]广东工业大学机电工程学院,广东广州510006 [2]中国科学院深圳先进技术研究院,广东深圳518055 [3]香港中文大学,香港沙田999077

出　　处：《中国激光》2015年第11期106-112,I0003,I0004,共9页Chinese Journal of Lasers

基　　金：深圳市重大产业公关项目基金(SY49502)

摘　　要：光纤温度传感器易受到光源驱动电流变化、光路弯曲、熔接损耗等强度变化因素影响,为解决光强度变化导致的测温偏差,系统采用定时更新原始入射光谱,实现光源波形自校准。光谱分析装置易受环境温度变化引起光谱漂移,为解决光谱漂移引起的测温偏差,系统采用波长锁定器定位特征波长,使用光谱漂移补偿的方法,实现光谱自校准。为实现多通道光纤测温,设计了光学复用系统。设计自校准验证实验验证系统自校准功能的有效性,实验结果表明,在系统使用环境发生变化时,自校准测温系统测量误差小于±1℃,因此设计的自校准测温系统能够抵抗光源光谱波形变化带来的误差,克服光谱分析装置受环境温度的干扰。Fiber optic temperature sensors are accessibly affected by the light source drive current changes, the optical path bending, the splice loss and other intensity variables. In order to solve the temperature deviation caused by the light intensity variations, the system regularly updates the original incident spectrum to realize selfcalibration source waveform. The variation of ambient temperature causes the spectral drift of spectral analysis device which causes the deviation of temperature measurement. To solve this problem, the system uses wavelength locker to locate characteristic wavelength and uses spectral shift compensation method to achieve spectral self- calibration. The optical multiplexing system is designed to achieve multi-channel fiber optic temperature measurement. Self-calibration verification experiments are designed to verify the validity of the system selfcalibration function. Experimental results show that the system serf-calibrating temperature measurement deviation is less than ± 1 ℃,when the environment changes. Therefore, the self-calibrating temperature measurement system can withstand the deviation of source spectral waveform changes, and make the spectrum analysis device overcome the interference of ambient temperature.

关 键 词：光纤光学 温度测量 自校准 多通道 砷化镓 

分 类 号：TN304.91[电子电信—物理电子学]