Journal of Infrared and Millimeter Waves, Volume. 39, Issue 3, 331(2020)

High precision frequency modulated continuous wave (FMCW) laser ranging based on gas cells signal splicing

Ling-Ping YI, Fu-Min ZHANG*, Xing-Hua QU, and Ya-Ting LI
Author Affiliations
  • State Key Laboratory of Precision Measuring Technology and Instruments,Tianjin University, Tianjin300072, China
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    In the dual-path FMCW laser ranging system, the length calibration accuracy of the reference optical fiber directly affects the ranging accuracy. In order to improve the ranging accuracy, a high precision reference optical fiber calibration method was proposed, which was based on hydrogen cyanide(H13C14N) gas cells signal splicing. In this paper, the principle of calibration method based on H13C14N gas cells was deeply researched. Moreover, to reduce the burden of data acquisition, H13C14N signal splicing was used to optimize the calibration method. The experiments show that the calibration method based on H13C14N signal splicing is more stable than that based on laser interferometer traditionally. After calibrating the reference optical fiber by using H13C14N. At the same time, within a measuring range of 3.8 m, the error between ranging value of FMCW system and measuring value of interferometer is less than 14 μm, and the standard deviation is less than 17 μm.

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    Ling-Ping YI, Fu-Min ZHANG, Xing-Hua QU, Ya-Ting LI. High precision frequency modulated continuous wave (FMCW) laser ranging based on gas cells signal splicing[J]. Journal of Infrared and Millimeter Waves, 2020, 39(3): 331

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    Paper Information

    Category: Photoelectric Technology and Application

    Received: Sep. 24, 2019

    Accepted: --

    Published Online: Jul. 7, 2020

    The Author Email: Fu-Min ZHANG (zhangfumin@tju.edu.cn)

    DOI:10.11972/j.issn.1001-9014.2020.03.011

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