Three-Dimensional Imaging by Frequency-Comb Spectral Interferometry

Sensors

Ziqiang Zhang¹  Haoyun Zhang²  Hanzhong Wu²  Haihan Zhao²  Jingsheng Zhai²  Xinyang Xu² 

[1] Beijing Aerospace Xinfeng Mechanical Equipment Co., LTD, Beijing 100854, China;School of Marine Science and Technology, Tianjin University, Tianjin 300072, China;

关键词: frequency comb;    spectral interferometry;    mode-locked laser;    3d imaging;   

DOI  :  10.3390/s20061743

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown