Abstract

Negative lenses have been ground on the ends of laser rods to increase the TEM₀₀ mode volume. With the negative lenses on the ends, the laser rod acts like a distributed aperture. The distributed aperture radius and its effect on the useful volume of the laser rod are calculated. The mode radius and the diffraction loss for a laser rod with negative lenses ground on the ends are presented as a function of laser rod focal length and the Fresnel number.

© 1978 Optical Society of America

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