Nordstrom R J, Thomas M E, Peterson J C, Damon E K, Long R K
Appl Opt. 1978 Sep 1;17(17):2724-9. doi: 10.1364/AO.17.002724.
We have measured the monochromatic transmittances of pressure-broadened room-temperature water vapor samples at five laser frequencies of the CO(2) laser in the 10.4-microm band. Three different buffer gases were used. They were pure nitrogen, an 80:20 mixture of nitrogen and oxygen, and a 60:40 mixture of nitrogen and oxygen. The measurements at the five laser lines imply that oxygen is a less efficient broadener than nitrogen. The ratio of the oxygen-broadening coefficient to the nitrogen-broadening coefficient was measured to be 0.75 based on the data at the R(20) laser line. Results of this study demonstrate that pure nitrogen should not be used as a broadener for atmospheric modeling of monochromatic transmittances in the laboratory.
我们测量了在10.4微米波段的CO(2)激光的五个激光频率下，压力增宽的室温水蒸气样品的单色透过率。使用了三种不同的缓冲气体。它们分别是纯氮气、氮气与氧气按80:20的混合物，以及氮气与氧气按60:40的混合物。在这五条激光谱线处的测量结果表明，氧气作为增宽剂的效率低于氮气。根据R(20)激光谱线的数据，测得氧气增宽系数与氮气增宽系数之比为0.75。本研究结果表明，在实验室中进行单色透过率的大气建模时，不应使用纯氮气作为增宽剂。
