激光与光电子学进展, 2019, 56 (3): 030606, 网络出版: 2019-07-31
基于自注入锁定的光纤光栅传感解调技术 下载: 951次
Fiber Bragg Grating Sensing Demodulation Technology Based on Self-Injection Locking
光纤光学 自注入锁定 激光拍频 啁啾光纤光栅 温度 fiber optics self-injection locking laser beat frequency chirped fiber grating temperature
摘要
提出了一种基于自注入锁定的光纤光栅传感解调方法。采用光纤激光器结构,通过自注入锁定方法将激光器的输出波长锁定在传感光栅的反射波长处。利用啁啾光纤光栅的色散特性,将激光器波长的变化转化为谐振腔腔长的变化,利用激光拍频完成对激光波长变化的测量。阐述了所述方法的结构和测量原理,以温度传感为例进行了实验研究。所提方法具有解调系统简单、稳定性好、传感距离不受限制、兼容性良好的优点。
Abstract
A method of fiber Bragg grating sensing demodulation based on self-injection locking is proposed. This method adopts the structure of fiber laser, and the output wavelength of this fiber laser is locked at the reflection wavelength of the sensing grating by self-injection locking. Using the dispersion characteristic of the chirped fiber Bragg grating, the change of the wavelength of the laser is transformed into the change of the length of the resonant cavity. The wavelength change of the laser is measured by the laser beat frequency. The structure and measuring principle of this proposed method are described in detail, and the experimental research is carried out with the example of temperature sensing. This proposed method has the advantages of simple demodulation system, good stability, unlimited sensing distance and good compatibility.
王旭, 孟德龙, 李小康, 张玲娟, 陈天威. 基于自注入锁定的光纤光栅传感解调技术[J]. 激光与光电子学进展, 2019, 56(3): 030606. Xu Wang, Delong Meng, Xiaokang Li, Lingjuan Zhang, Tianwei Chen. Fiber Bragg Grating Sensing Demodulation Technology Based on Self-Injection Locking[J]. Laser & Optoelectronics Progress, 2019, 56(3): 030606.