Abstract

We describe a novel apoditic filter characterized by a near-Gaussian transmission function and capable of operating in high-power lasers. By using this filter within the telescopic cavity of a XeCl laser we have obtained a laser output beam with a near-Gaussian intensity distribution. The achieved beam size is comparable with and the beam quality is superior to those achievable with an equivalent diffractive unstable cavity.

© 1985 Optical Society of America

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