APPLICATION OF BALANCED DETECTION TO ABSORPTION MEASUREMENTS OF TRACE GASES WITH ROOM-TEMPERATURE, QUASI-CW QC LASERS
APPLICATION OF BALANCED DETECTION TO ABSORPTION MEASUREMENTS OF TRACE GASES WITH ROOM-TEMPERATURE, QUASI-CW QC LASERS
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平衡检测在室温准连续量子激光器痕量气体吸收测量中的应用
DOI：
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发表时间：
2001
期刊：
影响因子：
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通讯作者：
A. Cho
中科院分区：
文献类型：
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作者：
D. Sonnenfroh;W. Rawlins;M. Allen;C. Gmachl;F. Capasso;A. L. Hutchinson;D. Sivco;J. Baillargeon;A. Cho
分布式反馈量子级联（QC）激光器有望成为下一代中红外激光吸收光谱仪的核心，尤其适用于各种环境中痕量气体的测量。结合室温可操作的单模QC激光器将导致非常紧凑和坚固的传感器，用于真实的世界应用。我们报告的激光吸收光谱仪使用QC激光器在室温下工作在准连续波模式结合平衡比率检测的性能的初步结果。我们已经证明了在5.4 μm处对N2 O（10份10 6对于1 m路径（ppmv-m））和NO（520份10对于1 m路径（ppbv-m））的灵敏度。系统的改进，预计将导致两个数量级的灵敏度增加。OCIS代码：010.1120、120.1740、140.3070、300.1030、300.6260
Distributed feedback quantum cascade (QC) lasers are expected to form the heart of the next generation mid-IR laser absorption spectrometer, especially as applied to measurements of trace gases in a variety of environments. Incorporation of room temperature-operable, single mode QC lasers will result in very compact and rugged sensors for real world applications. We report preliminary results on the performance of a laser absorption spectrometer using a QC laser operating at room temperature in quasi-cw mode in conjunction with balanced ratiometric detection. We have demonstrated sensitivities for N2O (10 parts in 10 6 for a 1 m path (ppmv-m)) and NO (520 parts in 10 for a 1 m path (ppbv-m)) at 5.4 μm. System improvements are described which are expected to result in two orders of magnitude increase in sensitivity. OCIS codes: 010.1120, 120.1740, 140.3070, 300.1030, 300.6260