Kosterev A A, Curl R F, Tittel F K, Gmachl C, Capasso F, Sivco D L, Baillargeon J N, Hutchinson A L, Cho A Y
Rice Quantum Institute, Rice University, Houston, TX 77251-1892, USA.
Laser Phys. 2001 Jan;11(1):39-49.
Novel pulsed and cw quantum cascade distributed feedback (QC-DFB) lasers operating near lambda=8 micrometers were used for detection and quantification of trace gases in ambient air by means of sensitive absorption spectroscopy. N2O, 12CH4, 13CH4, and different isotopic species of H2O were detected. Also, a highly selective detection of ethanol vapor in air with a sensitivity of 125 parts per billion by volume (ppb) was demonstrated.
新型脉冲和连续波光量子级联分布反馈（QC-DFB）激光器在波长λ = 8微米附近工作，通过灵敏吸收光谱法用于检测和定量环境空气中的痕量气体。检测到了N2O、12CH4、13CH4以及不同同位素种类的H2O。此外，还展示了对空气中乙醇蒸气的高选择性检测，灵敏度为125体积十亿分之一（ppb）。
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