Saito Y, Weibring P, Edner H, Svanberg S
Appl Opt. 2001 Jul 20;40(21):3572-4. doi: 10.1364/ao.40.003572.
The absorption spectrum of alpha-pinene gas, a biogenic volatile organic compound, was directly measured with a pulsed mid-infrared laser. The maximum absorption wavelength was found to be ~3.42 mum, and an absorption cross section of 4.8 x 10(-23) m(2) molec(-1) was obtained. A simple theoretical calculation with the measured spectral data showed that several hundreds of parts in 10(12) (ppt) of alpha-pinene gas in forest-mountain areas over a range of ~10 km were detectable by a long-path-averaged hard-target absorption lidar. Requirements for system development were also discussed.
利用脉冲中红外激光直接测量了生物源挥发性有机化合物α-蒎烯气体的吸收光谱。发现其最大吸收波长约为3.42微米，并获得了4.8×10⁻²³平方米·分子⁻¹的吸收截面。利用实测光谱数据进行的简单理论计算表明，在约10公里范围内的森林山区，长路径平均硬目标吸收激光雷达能够检测到10¹²分之一（ppt）中数百个部分的α-蒎烯气体。还讨论了系统开发的要求。
