Broad band direct modulation for chirp AM lidar

Compared with single-pulse detecting laser radar, the Chirp AM lidar with high range resolution, high accuracy, and high ability to counter jamming, has a broad application in the future, such as laser terminal guidance, topographical mapping etc. Based on direct digital frequency synthesis technolo...

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Bibliographic Details
Published in:Optik (Stuttgart) 2017-02, Vol.130, p.383-392
Main Author: Zhang, Fangpei
Format: Article
Language:English
Subjects:
Broad band
Chirp AM lidar
Direct modulation
Semiconductor laser
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Summary:Compared with single-pulse detecting laser radar, the Chirp AM lidar with high range resolution, high accuracy, and high ability to counter jamming, has a broad application in the future, such as laser terminal guidance, topographical mapping etc. Based on direct digital frequency synthesis technology, we design and implement a broad band linear modulation signal generator, with output frequency of 4.8GHz, bandwidth of 600MHz. Adopting a high-frequency modulation circuit with specially designed, we realize broad band direct modulation on an 8W single laser diode with modulation bandwidth of 450MHz for the first time. It has established a base for development and application of compact chirp AM lidar.
ISSN:0030-4026
1618-1336
DOI:10.1016/j.ijleo.2016.10.097