光学学报, 2019, 39 (10): 1006006, 网络出版: 2019-10-09
基于光纤环形激光器的动态应变传感系统 下载: 1052次
Dynamic Strain Sensing System Based on Fiber Ring Laser
光纤光学 强度解调 动态应变 滤波器 光纤布拉格光栅 fiber optics intensity demodulation dynamic strain filter fiber Bragg grating
摘要
提出一种基于半导体光放大器的光纤环形激光器动态应变传感器系统。在此传感系统中,将基于半导体光放大器的光纤环形激光器结合光纤布拉格光栅作为光纤激光器的波长选择元件,用来探测外界的动态应变信号。激光腔的外部配置一个不可调谐的光纤法布里-珀罗滤波器作为强度解调器,同时配置光纤带通滤波器,可实现多个光纤光栅反射信号分离输出的功能。实验结果表明,传感系统对动态应变信号有较好的响应,能够测量高达200 kHz的动态应变信号,具备解调MHz频率范围信号的能力,验证了复用解调的可行性。该系统具有结构简单、成本低等特点,可应用于结构健康监测中动态应变信号的检测。
Abstract
This study presents a dynamic strain sensor system based on the fiber ring laser containing a semiconductor optical amplifier. In this sensing system, the semiconductor optical amplifier based fiber ring laser in combination with a fiber Bragg grating is used as a wavelength selecting component of the fiber laser to detect the external dynamic strain signal. A non-tunable fiber Fabry-Pérot filter is deployed outside the laser cavity as an intensity demodulator, and the function of separating and outputting the reflected signals of multiple fiber gratings can be realized by configuring the fiber bandpass filter. Experimental results show that the proposed sensing system has a good response to the dynamic strain signal at a frequency of up to 200 kHz, and it has the ability to demodulate the MHz frequency range signal. The feasibility of multiplex demodulation is also verified. The system has a simple structure and low cost, and can be applied to the detection of dynamic strain signals in structural health monitoring.
毛黎明, 陶传义, 顾子迪, 张婧, 成俊桦, 江旭海, 李娜. 基于光纤环形激光器的动态应变传感系统[J]. 光学学报, 2019, 39(10): 1006006. Liming Mao, Chuanyi Tao, Zidi Gu, Jing Zhang, Junhua Cheng, Xuhai Jiang, Na Li. Dynamic Strain Sensing System Based on Fiber Ring Laser[J]. Acta Optica Sinica, 2019, 39(10): 1006006.