摘要
提出一种基于四波混频效应的双波长光纤激光器传感器增敏方法,以提高基于保偏光纤光栅的双波长激光器传感器的灵敏度。双波长输出的波长间隔对温度、应力等外界待测量有很好的传感响应。利用四波混频效应可扩大此波长间隔。本实验中,使用3阶四波混频效应增敏方案可实现传统保偏光纤光栅激光器传感器温度灵敏度自-0.62pm/℃至-4.32pm/℃的提升,增敏近7倍。
We propose an approach based on the four-wave mixing (FWM) effect for improving the sensitivity of a dual-wavelength fiber laser sensor with polarization-maintaining fiber Bragg grating (PM-FBG). The wavelength interval of the dual wavelength output is proportional to external measures such as temperature and strain. Experimental results show that the wavelength interval can be incresaed using the FWM effect. In particular, we observe that the temperature sensitivity of the conventional laser sensor with PM-FBG is improved from -0.62 pm/℃to -4. 32 pm/℃ while using third-order FWM-based scheme, and a sensitivity enhancement of nearly 7 times is achieved.
作者
刘哲
邹喜华
刘璞宇
Liu Zhe;Zou Xihua;Liu Puyu(Center for Information Photonics & Communications,School of Information Science and Technology,Southwest Jiaotong University,Chengdu,Sichuan 611756,China)
出处
《激光与光电子学进展》
CSCD
北大核心
2019年第17期347-356,共10页
Laser & Optoelectronics Progress
基金
国家自然科学基金(61475128)
关键词
光纤光学
光纤光栅传感
双波长光纤激光器
非线性光学
增敏
fiber optics
fiber grating sensing
dual-wavelength fiber lasers
nonlinear optics
sensitivity enhancement
