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CO₂分子的近红外可调谐二极管激光吸收光谱高灵敏探测

Highly sensitive detection of CO₂ molecule using near-infrared diode laser absorption spectroscopy

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【Author】 SHAO Jie, GAO Xiao-ming, YANG Yong, HUANG Wei, PEI Shi-xing, YUAN Yi-qian, ZHANG Wei-jun, ( Laboratory of Atmospheric Optics, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China ; Environmental Spectroscopy Laboratory, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China )

【机构】中国科学院安徽光学精密机械研究所国家863计划大气光学重点实验室；中国科学院安徽光学精密机械研究所环境光谱学实验室；中国科学院安徽光学精密机械研究所环境光谱学实验室安徽合肥 230031；安徽合肥 230031；安徽合肥 230031；

【摘要】利用近红外可调谐半导体二极管激光用直接吸收光谱技术和波长调制光谱技术初步观测了CO2 在1.31 m附近的吸收。从实验结果可以看出,在4.5torr压力下,可探测最小吸收线强度为3.769×10-27 μcm-1/(molecule·cm-2),相应的信噪比是16.8。更多还原

【Abstract】 Observation of CO2 by combined near-infrared tunable diode laser with direction absorption spectroscopy and wavelength modulation spectroscopy around 1.31 μm was presented. A minimum detectable absorption line intensity of 3.769 ×10-27 cm-1/(molecule·cm-2) was achieved at the pressure of 5 Torr, with a corresponding SNR of 16.8.更多还原