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Three-Dimensional Imaging by Frequency-Comb Spectral Interferometry
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DOI：10.3390/s20061743.png)
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Abstract
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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 mu m, 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 mu m. Our system could provide a pathway to the real industry applications in future.
Keywords:
frequency comb
spectral interferometry
mode-locked laser
3D imaging
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