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Proceedings Paper

Study on cascaded stepwise singular value decomposition and its application in laser absorption spectroscopy
Author(s): Qi-xing Tang; Yu-jun Zhang; Guo-hua Liu; Bo-qiang Fan
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Paper Abstract

During the detection process of atmospheric laser absorption spectroscopy in open space, the useful signal may be submerged in the noise due to the inherent noise of the instrument and external environmental noise. In order to effectively improve the signal-to-noise ratio, a new method of cascaded stepwise singular value decomposition has been proposed. By constructing different matrices, the low-frequency noise and high-frequency noise are removed in stages. A laser absorption spectroscopy atmospheric detection system in open space has been established to experimentally verify. The results show that, compared with the traditional method, the signal-to-noise ratio of the spectral signal processed by the method of cascaded stepwise singular value decomposition is increased from 0.211 to 1.029, the standard deviation is also reduced by 1.927 times. It is proved that the proposed method can effectively remove noise and obtain high-quality laser absorption spectrum signal to improve gas detection accuracy, which has practical value.

Paper Details

Date Published: 15 November 2018
PDF: 8 pages
Proc. SPIE 10964, Tenth International Conference on Information Optics and Photonics, 109641Y (15 November 2018); doi: 10.1117/12.2505544
Show Author Affiliations
Qi-xing Tang, Anhui Institute of Optics and Fine Mechanics (China)
Univ. of Science and Technology of China (China)
Yu-jun Zhang, Anhui Institute of Optics and Fine Mechanics (China)
Guo-hua Liu, Anhui Institute of Optics and Fine Mechanics (China)
Univ. of Science and Technology of China (China)
Bo-qiang Fan, Anhui Institute of Optics and Fine Mechanics (China)
Univ. of Science and Technology of China (China)


Published in SPIE Proceedings Vol. 10964:
Tenth International Conference on Information Optics and Photonics
Yidong Huang, Editor(s)

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