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Proceedings Paper

Photon counting chirped amplitude modulation lidar using an asymmetric triangular wave modulation
Author(s): Zijing Zhang; Longzhu Cen; Jiandong Zhang; Kun Ma; Feng Wang; Yuan Zhao
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Paper Abstract

We propose a novel strategy of asymmetric triangular-wave modulation for photon-counting chirped amplitude modulation (PCCAM) lidar. Earlier studies use the symmetric triangle wave modulation, by which the velocity can be detected only when the Doppler shift caused by a moving target is greater than Full Width Half Maximum (FWHM) of Intermediate Frequency (IF). We use an alternative method known as the asymmetric triangular wave modulation method, in which the modulation rates of the up-ramp and the down-ramp are different. This new method avoids the overlapping of the up-ramp and the down-ramp IF peaks, and breaks the limit of the FWHM of IF peak to improve the velocity measuring sensitivity (also called the minimum detectable velocity). Finally, a proof-of-principle experiment is carried out in the laboratory. The experimental results agree well with the theoretical results and show the improvement of the minimum detectable velocity.

Paper Details

Date Published: 7 November 2016
PDF: 6 pages
Proc. SPIE 10141, Selected Papers of the Chinese Society for Optical Engineering Conferences held July 2016, 101410V (7 November 2016); doi: 10.1117/12.2249728
Show Author Affiliations
Zijing Zhang, Harbin Institute of Technology (China)
Longzhu Cen, Harbin Institute of Technology (China)
Jiandong Zhang, Harbin Institute of Technology (China)
Kun Ma, Harbin Institute of Technology (China)
Feng Wang, Tianjin Jinhang Institute of Technical Physics (China)
Yuan Zhao, Harbin Institute of Technology (China)

Published in SPIE Proceedings Vol. 10141:
Selected Papers of the Chinese Society for Optical Engineering Conferences held July 2016
Yueguang Lv; Weimin Bao; Guangjun Zhang, Editor(s)

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