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
- Acta Optica Sinica
- Vol. 38, Issue 3, 328015 (2018)
Fig. 1. Relationship of (a) quality factor and (b) cell constant with size of resonant cell
Fig. 2. Structural diagrams of (a) fiber-optic F-P microphone probe and (b) cantilever
Fig. 3. Frequecy response of fiber-optic F-P microphone
Fig. 4. Near-infrared absorption lines of acetylene and moisture
Fig. 5. Structural diagram of laser photoacoustic spectroscopic system
Fig. 6. Frequency response of resonant photoacoustic cell
Fig. 7. (a) Second harmonic signals and (b) photoacoustic responses under different volume fractions of acetylene
Fig. 8. Background noise measurement with photoacoustic cell filled with pure nitrogen
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