Three-Dimensional Imaging by Frequency-Comb Spectral Interferometry
1
School of Marine Science and Technology, Tianjin University, Tianjin 300072, China
2
Beijing Aerospace Xinfeng Mechanical Equipment Co., LTD, Beijing 100854, China
*
Author to whom correspondence should be addressed.
Sensors 2020, 20(6), 1743; https://doi.org/10.3390/s20061743
Received: 22 February 2020 / Revised: 18 March 2020 / Accepted: 18 March 2020 / Published: 20 March 2020
(This article belongs to the Special Issue Development and Applications of Optical Sensing)
In this paper, we demonstrate a three-dimensional imaging system based on the laser frequency comb. We develop a compact, all-fiber mode-locked laser at 1 μm, whose repetition frequency can be tightly synchronized to the external frequency reference. The mode-locked state is achieved via the saturable absorber mirror in a linear cavity, and the laser output power can be amplified from 4 mW to 150 mW after a Yb-doped fiber amplifier. Three-dimensional imaging is realized via the spectral interferometry with the aid of an equal-arm Michelson interferometer. Compared with the reference values, the measurement results show the difference can be below 4 μm. Our system could provide a pathway to the real industry applications in future.
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Keywords:
frequency comb; spectral interferometry; mode-locked laser; 3D imaging
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MDPI and ACS Style
Zhao, H.; Zhang, Z.; Xu, X.; Zhang, H.; Zhai, J.; Wu, H. Three-Dimensional Imaging by Frequency-Comb Spectral Interferometry. Sensors 2020, 20, 1743. https://doi.org/10.3390/s20061743
AMA Style
Zhao H, Zhang Z, Xu X, Zhang H, Zhai J, Wu H. Three-Dimensional Imaging by Frequency-Comb Spectral Interferometry. Sensors. 2020; 20(6):1743. https://doi.org/10.3390/s20061743
Chicago/Turabian StyleZhao, Haihan; Zhang, Ziqiang; Xu, Xinyang; Zhang, Haoyun; Zhai, Jingsheng; Wu, Hanzhong. 2020. "Three-Dimensional Imaging by Frequency-Comb Spectral Interferometry" Sensors 20, no. 6: 1743. https://doi.org/10.3390/s20061743
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