| 基于电光采样的飞秒激光精密测距及应用 |
| Precision femtosecond laser ranging based on electro⁃optic sampling and its applications |
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| 中文摘要: |
| 为探索高精度、高速度激光精密测量，研究了基于电光采样定时检测技术的飞秒光频梳精密测距，该光频梳测距系统结合了光纤Sagnac干涉环、动态相位偏置的电光调制器、非互易静态相位偏置单元以及光脉冲飞行时间探测，具备高精度和高速度的优点。研究表明：该系统在26 ms积分时间内可实现45 nm的单点测距不确定度，通过结合二维扫描平移台，实现了量块台阶高度和硬币表面形貌的精密测量；并对3 m外受附近扬声器声波振动的漫反射金属薄膜进行了动态检测，还原了所播放的音乐声信号。本研究展示了电光采样定时检测技术在高精度、高速度距离测量中的巨大潜力，为促进精密测距领域的发展起到重要作用。 |
| 英文摘要: |
| 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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| 中文关键词: 激光测距 台阶测量 电光采样 光学频率梳 |
| 英文关键词:laser ranging step measurement electro-optic sampling optical frequency comb |
| 基金项目: |
| DOI：10.11823/j.issn.1674-5795.2025.02.08 |
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