Silicon photonic integrated circuit for fast and precise dual-comb distance metrology.

OPTICS EXPRESS(2017)

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摘要
We demonstrate an optical distance sensor integrated on a silicon photonic chip with a footprint of well below 1 mm(2). The integrated system comprises a heterodyne receiver structure with tunable power splitting ratio and on-chip photodetectors. The functionality of the device is demonstrated in a synthetic-wavelength interferometry experiment using frequency combs as optical sources. We obtain accurate and fast distance measurements with an unambiguity range of 3.75 mm, a root-mean-square error of 3.4 mu m and acquisition times of 14 mu s. (C) 2017 Optical Society of America
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