Formaldehyde sensor using interband cascade laser based quartz-enhanced photoacoustic spectroscopy
Formaldehyde sensor using interband cascade laser based quartz-enhanced photoacoustic spectroscopy
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DOI：
10.1007/s00340-004-1659-3
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发表时间：
2004-11-01
影响因子：
2.1
通讯作者：
Yang, RQ
中科院分区：
文献类型：
--
作者：
Horstjann, M;Bakhirkin, YA;Yang, RQ
利用一种新型的连续波中红外分布反馈带间级联激光器，利用石英增强光声光谱技术对甲醛（H2 CO）进行检测和定量。该激光器在液氮温度下工作，并在3.53 μ m（2832.5 cm（-1））处提供高达12 mW的单模输出功率。对于环境空气中的H2 CO，测得传感器的噪声等效（1 σ）检测灵敏度为2.2 × 10（-8）cm（-1）W（Hz）（-1/2），这对应于10 s传感器时间常数和3.4 mW激光功率输送到传感器模块时0.6份10（6）体积（ppmv）的检测限。
A novel continuous-wave mid-infrared distributed feedback interband cascade laser was utilized to detect and quantify formaldehyde (H2CO) using quartz-enhanced photoacoustic spectroscopy. The laser was operated at liquid-nitrogen temperatures and provided single-mode output powers of up to 12 mW at 3.53 mum (2832.5 cm(-1)). The noise equivalent (1sigma) detection sensitivity of the sensor was measured to be 2.2x10(-8) cm(-1) W (Hz)(-1/2) for H2CO in ambient air, which corresponds to a detection limit of 0.6 parts in 10(6) by volume (ppmv) for a 10 s sensor time constant and 3.4 mW laser power delivered to the sensor module.