中国激光, 2004, 31 (11): 1367, 网络出版: 2006-06-12  

一种双波长光纤测温系统波长带宽的优化设计

Optimization of Wavelength Bandwidth for a Dual-Wavelength Fiber-Optic Temperature Measuring System
作者单位
1 河南师范大学物理系, 河南 新乡 453002
2 空军第一航空学院基础部,河南 信阳 464000
3 四川大学原子与分子物理研究所,四川 成都 610066
摘要
基于Kirchhoff定律,利用钽酸锂热释电探测器设计了一种实用化的双波长、高精度光纤测温系统。简要介绍了该仪器的基本结构及其工作原理,并依照单个探测器的温度分辨率、测温系统中R(T)-T曲线的线性度与温度灵敏度,以及系统的测温误差随波长带宽的变化,在考虑单个探测器的最小响应度和温度分辨率的基础上,对系统工作波长的带宽进行了优化设计。得出了在测温范围400~1300℃内,当系统的工作波长为λ1=2.1 μm,λ2=2.3 μm时,其工作波长的带宽取20 nm较为合适的结论。
Abstract
Based on the Kirchhoff law, a practical high-precision dual-wavelength fiber-optic temperature measuring system using LiTaO3 pyroelectric detector is presented. The structure and the principle of the system are described. According to the temperature resolving power of single detector, the linearity of R(T)-T curves, temperature measuring sensitivity in the measuring system as well as the relationship between the temperature measuring errors and the change of wavelength bandwidth, and after considering the minimal responsibility and the measuring resolution of a single detector, the optimization for its working wavelength bandwidth was done. The optimal result showed that the proper bandwidth of the working wavelength should be 20nm at 400~1300℃ and λ1=2.1 μm, λ2=2.3 μm.
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施德恒, 孙金锋, 陈玉科, 刘玉芳, 黄国庆. 一种双波长光纤测温系统波长带宽的优化设计[J]. 中国激光, 2004, 31(11): 1367. 施德恒, 孙金锋, 陈玉科, 刘玉芳, 黄国庆. Optimization of Wavelength Bandwidth for a Dual-Wavelength Fiber-Optic Temperature Measuring System[J]. Chinese Journal of Lasers, 2004, 31(11): 1367.

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