Author(s)

Rong Xiang^1*, Chuxia Chen¹, Bing Kong¹, Qiusan Hong¹, Liang Lu²

¹School of Electronic Engineering, Chaohu University, Chaohu, China.
²Key Laboratory of Opto-Electronic Information Acquisition and Manipulation of Ministry of Education, Anhui University, Hefei, China.

Recently, with the rapid development of precision machining, microvibration measurement is required for the manufacturing and installation of parts and components. In this paper, a self-mixing microvibration measurement system of a π-phase shifted Distributed feedback (DFB) fiber laser is introduced. An all-fiberized configuration Er³⁺-Yb³⁺ co-doped DFB fiber laser was used as light source, in which an active π-phase shifted fiber Bragg grating (FBG) was wrote on Er³⁺-Yb³⁺ co-doped fiber. Using this, it can easily get a single-mode lasing with narrow linewidth. Experimental results demonstrate that the amplitude of vibration can be achieved down to λ/5 without any modulation parts while utilizing the reflecting mirror. It is in good agreement with the theoretical analysis and very helpful in proving sensitivity and stability of the measurement system. In addition, remote vibration measurement with a distance of 20 km is also realized with this system.

Self-Mixing, Distributed Feedback Fiber Laser, Microvibration Measurement, Remote Vibration Measurement

Xiang, R. , Chen, C. , Kong, B. , Hong, Q. and Lu, L. (2022) A Self-Mixing Microvibration Measurement System of a π-Phase Shifted DFB Fiber Laser. Optics and Photonics Journal, 12, 269-282. doi: 10.4236/opj.2022.1212020.