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Sensors 2016, 16(8), 1179;

All-Fiber Configuration Laser Self-Mixing Doppler Velocimeter Based on Distributed Feedback Fiber Laser

Key Laboratory of Opto-Electronic Information Acquisition and Manipulation of Ministry of Education, Anhui University, Jiulong Road 111#, Hefei 230601, China
Key Laboratory of Environmental Optics and Technology, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China
State Key Laboratory of Transducer Technology, Institute of Intelligent Machines, Chinese Academy of Sciences, 350 Shu Shang Hu Road, Hefei 230031, China
Author to whom correspondence should be addressed.
Academic Editor: Vittorio M. N. Passaro
Received: 30 May 2016 / Revised: 18 July 2016 / Accepted: 19 July 2016 / Published: 27 July 2016
(This article belongs to the Section Physical Sensors)
Full-Text   |   PDF [7659 KB, uploaded 27 July 2016]   |  


In this paper, a novel velocimeter based on laser self-mixing Doppler technology has been developed for speed measurement. The laser employed in our experiment is a distributed feedback (DFB) fiber laser, which is an all-fiber structure using only one Fiber Bragg Grating to realize optical feedback and wavelength selection. Self-mixing interference for optical velocity sensing is experimentally investigated in this novel system, and the experimental results show that the Doppler frequency is linearly proportional to the velocity of a moving target, which agrees with the theoretical analysis commendably. In our experimental system, the velocity measurement can be achieved in the range of 3.58 mm/s–2216 mm/s with a relative error under one percent, demonstrating that our novel all-fiber configuration velocimeter can implement wide-range velocity measurements with high accuracy. View Full-Text
Keywords: self-mixing effect; DFB fiber laser; Laser Doppler Velocimeter (LDV) self-mixing effect; DFB fiber laser; Laser Doppler Velocimeter (LDV)

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Wu, S.; Wang, D.; Xiang, R.; Zhou, J.; Ma, Y.; Gui, H.; Liu, J.; Wang, H.; Lu, L.; Yu, B. All-Fiber Configuration Laser Self-Mixing Doppler Velocimeter Based on Distributed Feedback Fiber Laser. Sensors 2016, 16, 1179.

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