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  • Received: Mar. 31, 2019

    Accepted: May. 23, 2019

    Posted: Jul. 29, 2019

    Published Online: Jul. 29, 2019

    The Author Email: Yawen Cai (yjsong@tju.edu.cn)

    DOI: 10.3788/COL201917.091202

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    Yuepeng Li, Yawen Cai, Runmin Li, Haosen Shi, Haochen Tian, Mingzhao He, Youjian Song, Minglie Hu. Large-scale absolute distance measurement with dual free-running all-polarization-maintaining femtosecond fiber lasers[J]. Chinese Optics Letters, 2019, 17(9): 091202

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Chinese Optics Letters, Vol. 17, Issue 9, 091202 (2019)

Large-scale absolute distance measurement with dual free-running all-polarization-maintaining femtosecond fiber lasers

Yuepeng Li1, Yawen Cai2,*, Runmin Li1, Haosen Shi1, Haochen Tian1, Mingzhao He3, Youjian Song1, and Minglie Hu1

Author Affiliations

  • 1Ultrafast Laser Laboratory, Key Laboratory of Opto-electronic Information Science and Technology of Ministry of Education, School of Precision Instruments and Opto-electronics Engineering, Tianjin University, Tianjin 300072, China
  • 2Institute of Spacecraft System Engineering, China Academy of Space Technology, Beijing 100094, China
  • 3National Institute of Metrology, Beijing 100029, China

Abstract

We demonstrate a robust femtosecond LIDAR setup by using two free-running environmentally stable all-polarization-maintaining nonlinear amplified loop mirror mode-locked fiber lasers. Based on the asynchronous optical sampling method, a ranging accuracy of ±2?μm within 65?m has been achieved, as tested in an 80-m-long underground optical tunnel. Through the Kalman filter in real-time data processing, the measurement accuracy can be maintained at a 200?Hz update rate. This setup provides a practical tool for various large-scale industrial and astronomical ranging applications.