一种微梳授权的傅立叶域锁模激光雷达

IF 12.5 1区综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES

Science Advances Pub Date : 2025-02-05

Zhaoyu Cai, Zihao Wang, Ziqi Wei, Baoqi Shi, Wei Sun, Changxi Yang, Junqiu Liu, Chengying Bao

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引用次数: 0

摘要

光探测和测距（激光雷达）已成为自主技术中不可或缺的工具。在各种激光雷达技术中，频率调制连续波（FMCW）激光雷达因其超低回波功率、抗干扰能力强以及可同时获取距离和速度而脱颖而出。然而，实现亚微米精度的快速更新率仍然是 FMCW 激光雷达面临的一项挑战。在这里，我们通过将宽带傅里叶域模式锁定（FDML）激光器与氮化硅孤子微蜂窝相结合，展示了这种具有亚 10 纳米精度和 24.6 千赫兹更新率的激光雷达。为了达到这一性能，50 千兆赫的微蜂窝对高达每秒 320 千兆赫的超高频啁啾率进行了线性化处理。我们的理论分析还有助于解决用非线性频率扫描进行 FMCW 速度测量的难题，并使我们能够实现不确定性低于每秒 0.4 毫米的速度测量。我们的工作展示了微蜂窝如何释放超快扫频激光器的潜力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

A microcomb-empowered Fourier domain mode-locked LIDAR

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A microcomb-empowered Fourier domain mode-locked LIDAR

Light detection and ranging (LIDAR) has emerged as an indispensable tool in autonomous technology. Among its various techniques, frequency-modulated continuous wave (FMCW) LIDAR stands out due to its capability to operate with ultralow return power, immunity to unwanted light, and simultaneous acquisition of distance and velocity. However, achieving a rapid update rate with submicrometer precision remains a challenge for FMCW LIDARs. Here, we present such a LIDAR with a sub–10-nanometer precision and a 24.6-kilohertz update rate by combining a broadband Fourier domain mode-locked (FDML) laser with a silicon nitride soliton microcomb. An ultrahigh-frequency chirp rate up to 320 petahertz per second is linearized by a 50-gigahertz microcomb to reach this performance. Our theoretical analysis also contributes to resolving the challenge of FMCW velocity measurements with nonlinear frequency sweeps and enables us to realize velocity measurement with an uncertainty below 0.4 millimeter per second. Our work shows how microcombs can unlock the potential of ultrafast frequency sweeping lasers.

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来源期刊

Science Advances 综合性期刊-综合性期刊

CiteScore

21.40

自引率

1.50%

发文量

1937

审稿时长

29 weeks

期刊介绍： Science Advances, an open-access journal by AAAS, publishes impactful research in diverse scientific areas. It aims for fair, fast, and expert peer review, providing freely accessible research to readers. Led by distinguished scientists, the journal supports AAAS's mission by extending Science magazine's capacity to identify and promote significant advances. Evolving digital publishing technologies play a crucial role in advancing AAAS's global mission for science communication and benefitting humankind.