All-fiber self-mixing laser Doppler velocimetry with much less than 0.1 pW optical feedback based on adjustable gain

被引：26
作者：
Zhao, Yuanyang [1 ]
Zhu, Desheng [1 ]
Chen, Youze [1 ]
Tu, Yourui [1 ]
Bi, Tiezhu [1 ]
Zhao, Yunkun [1 ]
Yu, Benli [1 ]
Lu, Liang [1 ]
机构：
[1] Anhui Univ, Key Lab Optoelect Informat Acquisit & Manipulat, Minist Educ, Hefei 230601, Peoples R China
来源：
OPTICS LETTERS | 2020年 / 45卷 / 13期
基金：
中国国家自然科学基金;
关键词：
DISPLACEMENT; PARTICLES; DIODE; INTERFEROMETRY; INTERFERENCE; PERFORMANCE; RESOLUTION; SYSTEM;
D O I：
10.1364/OL.397819
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
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. (C) 2020 Optical Society of America
引用
收藏
页码：3565 / 3568
页数：4
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