Abstract
The all-fiber self-mixing laser Doppler velocimetry with adjustable gain is experimentally investigated based on a distributed Bragg reflector fiber laser. In the measurement system, the modulation gain of the injected light in the laser cavity is adjusted by a pair of fiber-coupled acousto-optic modulators (AOMs) in the external cavity, which can change the intensity and frequency of the self-mixing modulation effect. Simultaneously, the minimum feedback intensity from the target to the laser for successful measurements is 0.063 pW. Thus, the all-fiber laser velocimetry can adapt to the detection of ultraweak optical feedback and wide-range velocity measurements in various complex scenes.
© 2020 Optical Society of America
Full Article | PDF ArticleMore Like This
Kenju Otsuka
Opt. Lett. 40(20) 4603-4606 (2015)
Yuanyang Zhao, Desheng Zhu, Yourui Tu, Lingling Pi, Hongtao Li, Lin Xu, Zhijia Hu, Yuecheng Shen, Benli Yu, and Liang Lu
Opt. Lett. 46(6) 1229-1232 (2021)
Desheng Zhu, Yuanyang Zhao, Yourui Tu, Hongtao Li, Lin Xu, Benli Yu, and Liang Lu
Opt. Lett. 46(1) 114-117 (2021)