Xukun YIN, Miao GAO, Ruiqi MIAO, Yongliang SU, Xueshi ZHANG, Le ZHANG, Lixian LIU, Xiaopeng SHAO. Highly Sensitive Carbon Monoxide Gas Sensors Based on a Difference Photoacoustic Cell（Invited）[J]. Acta Photonica Sinica, 2021, 50(10): 1030002
- Acta Photonica Sinica
- Vol. 50, Issue 10, 1030002 (2021)
Fig. 1. Spectral absorption lines of CO in infrared band
Fig. 2. Spectral absorption lines of CO，CO2 and H2O in 1 560~1 575 nm wavelength band
Fig. 3. Schematic of low background noise and differential configuration photoacoustic cell
Fig. 4. Product image of low background noise and differential configuration photoacoustic cell
Fig. 5. Schematic of CO photoacoustic sensor system. Inset：frequency response curve of photoacoustic cell
Fig. 6. Signal to noise ratio of CO photoacoustic sensor as a function of the actual excitation powers
Fig. 7. Signal amplitude of CO photoacoustic sensor as a function of the pressure
Fig. 8. Concentration response linearity of CO photoacoustic sensor
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