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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 22, Iss. 6 — Mar. 24, 2014
  • pp: 6597–6604

Absolute distance measurement by dual-comb nonlinear asynchronous optical sampling

Hongyuan Zhang, Haoyun Wei, Xuejian Wu, Honglei Yang, and Yan Li  »View Author Affiliations

Optics Express, Vol. 22, Issue 6, pp. 6597-6604 (2014)

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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.

© 2014 Optical Society of America

OCIS Codes
(120.0120) Instrumentation, measurement, and metrology : Instrumentation, measurement, and metrology
(120.3930) Instrumentation, measurement, and metrology : Metrological instrumentation
(320.7100) Ultrafast optics : Ultrafast measurements

ToC Category:
Instrumentation, Measurement, and Metrology

Original Manuscript: January 27, 2014
Revised Manuscript: March 5, 2014
Manuscript Accepted: March 10, 2014
Published: March 13, 2014

Hongyuan Zhang, Haoyun Wei, Xuejian Wu, Honglei Yang, and Yan Li, "Absolute distance measurement by dual-comb nonlinear asynchronous optical sampling," Opt. Express 22, 6597-6604 (2014)

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