14 November 2016 A photocoustic spectroscopy system for gas detection based on the multi-pass cell
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Abstract
Photo-acoustic spectroscopy gas detection technology has the advantages of high sensitivity, good selectivity, small size and real time monitoring and has been widely used in environmental monitoring, industrial production, medical diagnosis, biological technology and monitoring of power facilities. In this paper, a method to improve the sensitivity of photo-acoustic spectroscopy system is presented, which is combined with the technique of Herriott type multiple pass cell. In this experimental apparatus, the design of the experimental device can make the beam pass the cell 18 times. By comparing the signal of one time pass through the photoacoustic cell and the signal of 18 times passes pass through the photoacoustic cell, we can confirm that the signal is increased and this method is feasible.
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Luo Han, Xinglong Chen, Hua Xia, Tao Pang, Zhirong Zhang, Brian Wu, Pengshuai Sun, Xiaojuan Cui, Zhe Li, Yu Wang, Fengzhong Dong, "A photocoustic spectroscopy system for gas detection based on the multi-pass cell", Proc. SPIE 10025, Advanced Sensor Systems and Applications VII, 100250N (14 November 2016); doi: 10.1117/12.2246385; https://doi.org/10.1117/12.2246385
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