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Distance measurement using frequency-modulated continuous-wave ladar with calibration by a femtosecond frequency comb
Author(s): Yang Liu; Linghui Yang; Jiarui Lin; Jigui Zhu
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Paper Abstract

Precise distance measurement is of interest for large-scale manufacturing, future space satellite missions, and other industrial applications. The ranging system with femtosecond optical frequency comb (FOFC) could offer high accuracy, stability and direct traceability to SI definition of the meter. Here, we propose a scheme for length measurement based on the frequency-modulated continuous-wave (FMCW) ladar with a FOFC. In this scheme, the reference interferometer in the FMCW ladar is calibrated by the intensity detection using the FOFC in the time domain within an optical wavelength resolution. With analysis of the theoretical model, this system has the potential to a high-speed, high-accuracy absolute distance measurement. Then, based on the experimental results, the evaluation of the performance of the calibration of the reference arm is discussed. In addition, the performance of this system is evaluated by a single position measurement with different tuning velocities of wavelength. The experimental results show that the reproducibility of the distance measurement is 10-5 level.

Paper Details

Date Published: 12 January 2018
PDF: 9 pages
Proc. SPIE 10621, 2017 International Conference on Optical Instruments and Technology: Optoelectronic Measurement Technology and Systems, 1062102 (12 January 2018); doi: 10.1117/12.2294991
Show Author Affiliations
Yang Liu, Tianjin Univ. (China)
Linghui Yang, Tianjin Univ. (China)
Jiarui Lin, Tianjin Univ. (China)
Jigui Zhu, Tianjin Univ. (China)


Published in SPIE Proceedings Vol. 10621:
2017 International Conference on Optical Instruments and Technology: Optoelectronic Measurement Technology and Systems
Jigui Zhu; Hwa-Yaw Tam; Kexin Xu; Hai Xiao; Liquan Dong, Editor(s)

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