双光频梳非线性异步光学采样绝对距离测量

doi:10.3969/j.issn.1000-1158.2014.z1.02

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Abstract A dual-comb nonlinear asynchronous optical sampling method is proposed to simplify determination of the time interval and extend the non-ambiguity range in absolute length measurements. Type II second harmonic generation facilitates curve fitting in determining the time interval between adjacent pulses. Meanwhile, the non-ambiguity range is extended by adjusting the repetition rate of the signal laser. The performance of the proposed method is compared with a heterodyne interferometer. Results show that the system achieves a maximum residual of 100.6 nm and an uncertainty of 1.48 μm in a 0.5 ms acquisition time. With longer acquisition time, the uncertainty can be reduced to 166.6 nm for 50 ms and 82.9 nm for 500 ms. Moreover, the extension of the non-ambiguity range is demonstrated by measuring an absolute distance beyond the inherent range determined by the fixed repetition rate.

Key words： Metrology Absolute distance Measurement Optical frequency comb

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	Articles by authors
	LI Yan
	ZHANG Hong-yuan

Cite this article:

LI Yan,ZHANG Hong-yuan. Absolute Distance Measurement by Dual-comb Nonlinear Asynchronous Optical Sampling[J]. Acta Metrologica Sinica, 2014, 35(z1): 6-10.

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http://jlxb.china-csm.org:81/Jwk_jlxb/EN/10.3969/j.issn.1000-1158.2014.z1.02 OR http://jlxb.china-csm.org:81/Jwk_jlxb/EN/Y2014/V35/Iz1/6

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