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Proceedings Paper

Noise analysis and signal-to-noise ratio model of gain modulation laser imaging
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Paper Abstract

Gain modulation imaging technique is one of the prominent schemes for scannerless lidar. By controlling the gate width, it’s easy to suppress backscatter noise and make the image more accurately. Imaging range and accuracy of gain modulation laser imaging become a research focus at present. According to the principle of imaging, the signal energy and the noise energy reaching the imager can be found. Further signal-to-noise ratio can be obtained. Previous theoretical models consider only linear gain condition. However the influence of laser pulse width and other factors are less taken into consideration. These models will have a certain deviation with the actual one. By simulating the nonlinear gain with consideration of the laser pulse width and lambert spherical radiation, more accurate SNR model of gain modulation laser imaging is obtained. On this basis, the established SNR model can be used to estimate the experimental distance with good imaging effect. It provides the theoretical basis for subsequent experiment system parameter selection and image processing.

Paper Details

Date Published: 8 October 2015
PDF: 6 pages
Proc. SPIE 9675, AOPC 2015: Image Processing and Analysis, 967506 (8 October 2015); doi: 10.1117/12.2196953
Show Author Affiliations
Zhipeng Tu, Harbin Institute of Technology (China)
Sining Li, Harbin Institute of Technology (China)
Dayong Zhang, Harbin Institute of Technology (China)
Wei Lu, Harbin Institute of Technology (China)


Published in SPIE Proceedings Vol. 9675:
AOPC 2015: Image Processing and Analysis
Chunhua Shen; Weiping Yang; Honghai Liu, Editor(s)

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