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Spectroscopy system based on a single quantum cascade laser for simultaneous detection of CO and CO_2
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作者 魏敏 叶擎昊 +9 位作者 阚瑞峰 陈兵 杨晨光 许振宇 陈祥 阮俊 范雪丽 王薇 胡迈 刘建国 《Chinese Physics B》 SCIE EI CAS CSCD 2016年第9期368-373,共6页
A quantum cascade laser(QCL) based system for simultaneous detection of CO and CO_2 is developed.The QCL can scan over two neighboring CO(2055.40 cm^(-1)) and CO_2(2055.16 cm^(-1)) lines with a single curren... A quantum cascade laser(QCL) based system for simultaneous detection of CO and CO_2 is developed.The QCL can scan over two neighboring CO(2055.40 cm^(-1)) and CO_2(2055.16 cm^(-1)) lines with a single current scan.The wavelength modulation spectroscopy( f = 20 k Hz) is utilized to enhance the signal-to-noise ratio.A white cell with an effective optical path length of 74 m is used.The calibration of the sensor is performed and minimum detection limits of 1.3 ppb(1 × 10^(-9))for CO and 0.44 ppm(1 × 10^(-6)) for CO_2 are achieved. 展开更多
关键词 infrared absorption spectroscope quantum cascade lasers wavelength modulation spectroscopy greenhouse gas
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