High-resolution absorption spectra of real atmosphere at 1.315m m

The high-resolution absorption spectra of real atmosphere near the 1.315m m wavelength were recorded accurately using an experimental system. The system includes a tunable narrow-line-width pulsed OPO laser, a multipass absorption cell of the White-type with total optical length of 1097m, and a single time-division multiplexing fastresponse detector. The absorption cross-section of atmospheric absorption molecule at the 7 603.14cm- 1 wavelength of iodine laser was measured (1.05±0.09)×10- 24cm2 at the standard atmospheric condition. And the parameters of atmospheric absorption lines including the central position, strength and air-broadening halfwidth were also obtained around the wavelength of 1.315m m from the measured spectra of real atmosphere. It is found that the minimum absorp