Abstract

A model for stimulated Raman scattering in the atmosphere is described for the pure rotational transitions in N2. This model accounts for the wavelength dependence of the N2 polarizability anisotropy, altitude and seasonal temperature variations in the atmosphere, and the O2 foreign-gas density broadening. This information is used to calculate the steady-state plane-wave Raman gain profile over the lower 100 km of the atmosphere. Over altitudes of 0–40 km, temperature variations produce 30% changes in the gain coefficients of 1 km−1 cm2 MW−1 for the strongest lines at Stokes wavelengths of 350 nm.

© 1987 Optical Society of America

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