Research on Detecting CO with Quartz Enhanced Photoacoustic Spectroscopy Based on 2.33 μm Distributed Feed Back Laser

Hu Libing; Liu Kun; Wang Guishi; Wang Lei; Tan Tu; Gao Xiaoming

doi:10.3788/lop52.053002

Journals >Laser & Optoelectronics Progress >Volume 52 >Issue 5 >Page 53002 > Article

Laser & Optoelectronics Progress
Vol. 52, Issue 5, 53002 (2015)

Research on Detecting CO with Quartz Enhanced Photoacoustic Spectroscopy Based on 2.33 μm Distributed Feed Back Laser

Hu Libing^*, Liu Kun, Wang Guishi, Wang Lei, Tan Tu, and Gao Xiaoming

Author Affiliations

[in Chinese]

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DOI: 10.3788/lop52.053002 Cite this Article Set citation alerts

Hu Libing, Liu Kun, Wang Guishi, Wang Lei, Tan Tu, Gao Xiaoming. Research on Detecting CO with Quartz Enhanced Photoacoustic Spectroscopy Based on 2.33 μm Distributed Feed Back Laser[J]. Laser & Optoelectronics Progress, 2015, 52(5): 53002 Copy Citation Text

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Abstract

The novel 2.33 μm distributed feed back laser is used to detect carbon monoxide with off-beam quartz enhanced photoacoustic spectroscopy (QEPAS). The parameters including modulation frequency, modulation amplitude are optimized. The signal of off-beam QEPAS versus concentration of carbon monoxide is investigated. Good linearity between off-beam QEPAS signal and concentration of carbon monoxide is obtained. A normalized noise equivalent absorption coefficient of 3 × 10-6 cm-1·W/ Hz is obtained with a 1 s time constant of lock-in amplifier.

Keywords

carbon monoxide microresonator photoacoustic spectroscopy quartz tuning fork spectroscopy