Abstract

The gain coefficient in a low-pressure chemical laser during lasing differs when viewed along the optical resonator axis and when viewed normal to the axis. Expressions for axial and normal gain coefficients are deduced. The ratio of normal-to-axial gain coefficient is evaluated for a saturated multimode chemical laser employing a Fabry-Perot resonator. The results are useful for correlating numerical code calculations with experimental power on gain measurements made normal to the optical axis.

© 1983 Optical Society of America

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