光纤光栅在液氮温区温度传感性能的研究
Experiment on FBG temperature sensor in cryogenic environment
摘要
文章从光纤光栅的温度传感模型出发，理论分析了光纤光栅的温度传感特性，完成了在液氮温区(-196 ℃)的温度测量。将理论与实验结果进行对比分析后得知，在液氮温区或者大范围测温中，反射波长相对漂移量ΔλB/λB与温度改变量ΔT的关系是非线性的，呈二次关系式。
Abstract
A theoretical method for Fiber Bragg Grating (FBG) temperature sensing has been proposed. Based on a temperature sensing model of FBG, a temperature sensing experiment is conducted at liquid nitrogen temperature (-196 ℃). The theoretical and experimental results are compared and analyzed, which shows that at liquid nitrogen temperature or in large -scope temperature sensing, the relationship between the temperature variation ΔT and the relative shift of the reflected center wavelength ΔλB/λB of FBG is nonlinear and conic multinomial.
蔡国利, 简伟. 光纤光栅在液氮温区温度传感性能的研究[J]. 光通信研究, 2006, 32(6): 56. Cai Guoli, Jian Wei. Experiment on FBG temperature sensor in cryogenic environment[J]. Study On Optical Communications, 2006, 32(6): 56.
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