基于随机激光的光纤温度传感器研究  

Optical Fiber Temperature Sensor Based on Random Laser

作　　者：赵天锋 崔鹏鹏 王富祥 黄昌清 Zhao Tianfeng;Cui Pengpeng;Wang Fuxiang;Huang Changqing(College of Optical and Electronic Technology,China Jiliang University,Hangzhou 310018,Zhejiang,China)

机构地区：[1]中国计量大学光学与电子科技学院,浙江杭州310018

出　　处：《激光与光电子学进展》2022年第11期212-216,共5页Laser & Optoelectronics Progress

基　　金：浙江省基础公益研究计划项目(LGG19A040001)。

摘　　要：提出并实现了一种基于随机激光的光纤温度传感器。通过单模光纤的瑞利散射与布拉格光纤光栅(FBG)的反射提供激光器的光反馈,实现随机激光输出。结果表明,输出激光中心波长在1550.52 nm附近,阈值功率约为30 mW,当泵浦功率远高于阈值功率时,随机激光输出保持稳定。当FBG的温度在30℃到90℃范围内变化时,随机激光的输出波长会发生相应的移动,且温度和波长呈良好的线性关系,该传感器升温和降温时的温度灵敏度分别约为10.5 pm/℃和10.4 pm/℃。这种基于随机激光的光纤传感器将在温度传感领域有着广泛的应用前景。Herein,an optical fiber temperature sensor based on a random laser was proposed and implemented.The Rayleigh scattering of the singlemode fiber and the reflection of fiber Bragg grating(FBG)were employed to provide the optical feedback of the laser and achieve a random laser output.Results show that the central wavelength and threshold power of the output laser are 1550.52 nm and 30 mW,respectively.When the pump power is considerably higher than the threshold power,the laser output remains stable.When the temperature of FBG range varies from 30°C to 90°C,the output wavelengths of the random laser will shift accordingly,and there is a good linear relationship between temperature and wavelength.The temperature sensitivities of the sensor are 10.5 pm/℃and 10.4 pm/℃during heating and cooling,respectively.This type of optical fiber sensor based on random lasers is expected to show diverse application prospects in the temperature sensing field.

关 键 词：光纤光学 光纤传感 光纤激光器 布拉格光纤光栅 瑞利散射 

分 类 号：TN248[电子电信—物理电子学]