Laser & Optoelectronics Progress, Volume. 52, Issue 5, 53002(2015)
Research on Detecting CO with Quartz Enhanced Photoacoustic Spectroscopy Based on 2.33 μm Distributed Feed Back Laser
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.
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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
Paper Information
Category: Spectroscopy
Received: Dec. 1, 2014
Accepted: --
Published Online: May. 7, 2015
The Author Email: Libing Hu (lbhu@mail.ustc.edu.cn)
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