论文标题
780 nm处甲烷的二极管激光甲板光谱
Diode laser overtone spectroscopy of methane at 780 nm
论文作者
论文摘要
已使用可调二极管激光光谱仪检查在室温下在12780 cm $^{ - 1} $（780 nm）的区域中，该地区的$^{12} $ CH $ _4 $在室温下检查的泛音吸收线。光谱仪源是在“自由运行”模式下运行的市售可调二极管激光器。通过使用波长调制光谱和第二个谐波检测技术，可以在0.01 cm $^{ - 1} $内的线位置的测量，从而可以观察到$ \ \ \ \ \ \ \ \ \ \ 6} $的最小光吸收率。乐队的最弱线的吸收横截面为$ 1 \ times 10^{ - 25} $ cm $^2 $/分子，即$ \ simeq 0.3 $ km $^{ - 1} $/amagat。对于他们中的一些人来说，已经获得了自动，空气，HE和h $ _2 $ - 公路系数。
A tunable diode laser spectrometer has been employed to examine the overtone absorption lines of $^{12}$CH$_4$ in the region around 12780 cm$^{-1}$ (780 nm) at room temperature. The spectrometer sources are commercially available tunable diode lasers operating in "free-running" mode. The measurement of the line positions within 0.01 cm$^{-1}$ has been possible by the use of the wavelength modulation spectroscopy and the second harmonic detection techniques that permitted the observation of minimum optical absorbances of the order of $\approx 10^{-6}$. The weakest observed lines of the band have absorption cross sections of the order of $1 \times 10^{-25}$ cm$^2$/molecule, that is $\simeq 0.3$ km$^{-1}$/amagat. For some of them self-, air-, He- and H$_2$-broadening coefficients have been obtained.
