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一種新的高重頻寬帶相干激光雷達(dá)系統(tǒng)研究

李光祚,  默迪,  王寧,  王然,  張珂殊,  張?jiān)鲚x,  吳一戎

李光祚, 默迪, 王寧, 王然, 張珂殊, 張?jiān)鲚x, 吳一戎. 一種新的高重頻寬帶相干激光雷達(dá)系統(tǒng)研究[J]. 電子與信息學(xué)報(bào), 2018, 40(3): 525-531. doi: 10.11999/JEIT170479
引用本文: 李光祚, 默迪, 王寧, 王然, 張珂殊, 張?jiān)鲚x, 吳一戎. 一種新的高重頻寬帶相干激光雷達(dá)系統(tǒng)研究[J]. 電子與信息學(xué)報(bào), 2018, 40(3): 525-531. doi: 10.11999/JEIT170479
LI Guangzuo, MO Di, WANG Ning, WANG Ran, ZHANG Keshu, ZHANG Zenghui, WU Yirong. A Novel Coherent Ladar System with High Repetition Frequency and Wide Bandwidth[J]. Journal of Electronics & Information Technology, 2018, 40(3): 525-531. doi: 10.11999/JEIT170479
Citation: LI Guangzuo, MO Di, WANG Ning, WANG Ran, ZHANG Keshu, ZHANG Zenghui, WU Yirong. A Novel Coherent Ladar System with High Repetition Frequency and Wide Bandwidth[J]. Journal of Electronics & Information Technology, 2018, 40(3): 525-531. doi: 10.11999/JEIT170479

一種新的高重頻寬帶相干激光雷達(dá)系統(tǒng)研究

doi: 10.11999/JEIT170479
  • 1.

    (上海交通大學(xué)電子信息與電氣工程學(xué)院 上海 200240)

  • 2.

    (中國科學(xué)院電子學(xué)研究所 北京 100190)

A Novel Coherent Ladar System with High Repetition Frequency and Wide Bandwidth

  • 1.

    (School of Electronic Information and Electrical Engineering, Shanghai Jiaotong University, Shanghai 200240,China)

  • 2.

    (Insititute of Electronics, Chinese Academy of Sciences, Beijing 100190, China)

  • 摘要: 該文提出一種新的同時(shí)具有高重復(fù)頻率和大帶寬性能的相干激光雷達(dá)系統(tǒng)。該系統(tǒng)基于IQ調(diào)制器正交調(diào)制技術(shù)與帶寬合成信號處理技術(shù)，使得系統(tǒng)能夠同時(shí)滿足大帶寬和高重復(fù)頻率的要求，解決了傳統(tǒng)激光雷達(dá)寬帶信號調(diào)制速度慢的問題。該系統(tǒng)能夠生成高重頻、大帶寬的相干線性調(diào)頻激光雷達(dá)信號，在高分辨距離成像、(逆)合成孔徑激光雷達(dá)成像、距離分辨的振動(dòng)測量等方面，具有重要的應(yīng)用價(jià)值。文中闡述了寬帶高重復(fù)頻率調(diào)制的原理和方法、基于微波域頻率步進(jìn)的帶寬合成信號處理方法，并進(jìn)行光纖環(huán)路實(shí)驗(yàn)和自由空間實(shí)驗(yàn)。作為演示，該激光雷達(dá)系統(tǒng)獲得了16.7 kHz重復(fù)頻率、6 GHz帶寬，實(shí)現(xiàn)了優(yōu)于2.5 cm距離向分辨率成像及遠(yuǎn)距離運(yùn)動(dòng)目標(biāo)逆合成孔徑激光雷達(dá)成像。實(shí)驗(yàn)結(jié)果證明了該系統(tǒng)與方法的有效性。
    Abstract: A novel coherent ladar system with high repetition and wide bandwidth is proposed. Based on the IQ modulator from the fiber communication community and the bandwidth synthesis technique, the proposed system provides wide bandwidth with high repetition rate, which is difficult for conversional ladar system based on tuning the wavelength of a tunable laser. The proposed system is expected to be useful for high range resolution imaging, Inverse Synthetic Aperture Ladar (ISAL), range resolved vibration measurement. The operation principle, system description, and signal processing method for bandwidth synthesis are discussed in the paper. And experiments are performed both in fiber delay line and free space. As a demonstration, the system generates signal with 6 GHz at repetition rate of 16.7 kHz. The resolution of the obtained images is finer than 2.5 cm. The experimental results demonstrates the effectiveness of the proposed system and the processing method.
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  • PIERROTTET D, AMZAJERDIAN F, PETWAY L, et al. Linear FMCW laser radar for precision range and vector velocity measurements[C]. Material Research Society (MRS) Meeting, San Francisco, U.S.A, 2008: 1076-1085.
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    WANG Yanfei, LIU Chang, LI Heping, et al. An airborne SAR with 0.1 m resolution using multi-channel synthetic bandwidth[J]. Journal of Electronics Information Technology, 2013, 35(1): 29-35. doi: 10.3724/SP.J.1146.2011. 01370.
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出版歷程
  • 收稿日期:  2017-05-18
  • 修回日期:  2017-11-24
  • 刊出日期:  2018-03-19

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