Acta Optica Sinica, Volume. 38, Issue 3, 328015(2018)
Ultra-High Sensitive Photoacoustic Spectrometer for Trace Gas Detection Based on Fiber-Optic Acoustic Sensors
A cantilever-enhanced photoacoustic signal detection method based on fiber-optic Fabry-Perot interferometric sensors is proposed, which combines the technologies of fiber-optic sensing, longitudinal resonant photoacoustic spectroscopy, wavelength modulation and second-harmonic detection. According to the characteristics of fiber coupling near-infrared exciting light, the resonant photoacoustic cell is optimally designed. A high-sensitivity laser photoacoustic spectrometer for trace acetylene gas detection is developed. Experimental results show that the detection limit of acetylene reaches 8×10-10 with the measurement time of 60 s.
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Chen Ke, Yuan Shuai, Gong Zhenfeng, Yu Qingxu. Ultra-High Sensitive Photoacoustic Spectrometer for Trace Gas Detection Based on Fiber-Optic Acoustic Sensors[J]. Acta Optica Sinica, 2018, 38(3): 328015
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Received: Oct. 26, 2017
Accepted: --
Published Online: Mar. 20, 2018
The Author Email: Qingxu Yu (yuqx@dlut.edu.cn)