title: Spectroscopy of methane using a Nd:YAG laser at 1.34 microm.
abstract: We present measurements of the absorption coefficient of methane in the v(2) + 2v(3) band obtained with a neodymium:yttrium aluminum garnet (Nd:YAG) laser tuned by the use of an intracavity étalon to 7472 cm(-1) (1.3383 microm). The linewidth of the laser was shown to be comparable to that of the pressure-broadened methane feature while the absorption coefficient of methane at 1-atm pressure was measured to be 0.59 m(-1) atm(-1). These basic findings indicate that a practical methane detection system using laser radar (lidar) based on a Nd:YAG laser may be possible.
authors: J C
authors: JC
authors: Scott
authors: R A
authors: RA
authors: Maddever
authors: A T
authors: AT
authors: Paton