Metrology & Measurement Technology, Volume. 45, Issue 2, 80(2025)

Precision femtosecond laser ranging based on electro⁃optic sampling and its applications

Zhifeng QIU*, Shichao SUN, Boyao LI, Chufang GU, and Jinghua SUN
Author Affiliations
  • Institute of Ultrafast Optics and Photonics, School of Electrical Engineering and Intelligentization, Dongguan University of Technology, Dongguan523808, China
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    In order to research high precision and high speed laser measurement technology, this study explores precision ranging using a femtosecond optical frequency comb based on electro-optic sampling timing detection technology. The optical frequency comb ranging system integrates a fiber Sagnac interferometer, electro-optic modulators with dynamic phase bias, non-reciprocal static phase biasing units, and optical pulse time-of-flight detection, offering advantages of high precision and speed. The system achieves a 45 nm single-point ranging uncertainty within a 26 ms integration time. Coupled with a two-dimensional scanning translation stage, it enables precise measurements of step heights on gauge blocks and surface morphology of coins. Additionally, it dynamically detects the diffuse reflections from a metallic film 3 m away influenced by nearby speaker sound waves, faithfully reproducing the played music signals. This study demonstrates the great potential of electro-optic sampling timing detection technology in high precision and high speed distance measurement, playing a significant role in advancing the field of precision ranging.

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    Zhifeng QIU, Shichao SUN, Boyao LI, Chufang GU, Jinghua SUN. Precision femtosecond laser ranging based on electro⁃optic sampling and its applications[J]. Metrology & Measurement Technology, 2025, 45(2): 80

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    Paper Information

    Category: Ultrafast Optical Measurement Technology

    Received: Dec. 28, 2024

    Accepted: --

    Published Online: Jul. 23, 2025

    The Author Email:

    DOI:10.11823/j.issn.1674-5795.2025.02.08

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