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

LI Guangzuo; MO Di; WANG Ning; WANG Ran; ZHANG Keshu; ZHANG Zenghui; WU Yirong

doi:10.11999/JEIT170479

Volume 40 Issue 3

Mar. 2018

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Article Navigation > Journal of Electronics & Information Technology > 2018 > 40(3): 525-531

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

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

doi: 10.11999/JEIT170479

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)
3.

Received Date: 2017-05-18
Rev Recd Date: 2017-11-24
Publish Date: 2018-03-19

Abstract

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.
- Coherent ladar,
- High repetition frequency rate,
- Bandwidth synthesis,
- High Resolution Range Profile (HRRP)

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References(17)

References

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