Sub-ppbv nitric oxide concentration measurements using cw thermoelectrically cooled quantum cascade laser-based integrated cavity output spectroscopy
Sub-ppbv nitric oxide concentration measurements using cw thermoelectrically cooled quantum cascade laser-based integrated cavity output spectroscopy
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DOI：
10.1007/s00340-005-2058-0
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发表时间：
2006-01-01
影响因子：
2.1
通讯作者：
Faist, J
中科院分区：
文献类型：
--
作者：
Bakhirkin, YA;Kosterev, AA;Faist, J
一种基于5.45 μ m热电冷却、连续波、分布反馈量子级联激光器的一氧化氮（NO）气体传感器（1835 cm（-1））和离轴集成腔输出光谱结合波长调制技术被开发用于确定亚ppbv水平的NO浓度，这对于许多应用是必不可少的，例如医学诊断，环境监测和工业过程控制。该传感器采用了50厘米长的高精细光学腔，提供了类似于700米的有效路径长度。噪声等效（SNR = 1）的最低检测限为0.7 ppbv，1秒的观察时间。
A nitric oxide (NO) gas sensor based on a thermoelectrically cooled, continuous-wave, distributed feedback quantum cascade laser operating at 5.45 mu m ( 1835 cm(-1)) and off-axis integrated cavity output spectroscopy combined with a wavelength-modulation technique was developed to determine NO concentrations at the sub-ppbv levels that are essential for a number of applications, such as medical diagnostics, environmental monitoring, and industrial process control. The sensor employs a 50-cm-long high-finesse optical cavity that provides an effective path length of similar to 700 m. A noise equivalent ( SNR = 1) minimum detection limit of 0.7 ppbv with a 1-s observation time was achieved.