Metrology & Measurement Technology, Volume. 45, Issue 2, 80(2025)
Precision femtosecond laser ranging based on electro⁃optic sampling and its applications
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
Category: Ultrafast Optical Measurement Technology
Received: Dec. 28, 2024
Accepted: --
Published Online: Jul. 23, 2025
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