Abstract

A filter that shapes a laser beam to achieve a specified spatial intensity profile along a single coordinate is developed and studied. The filter consists of a diffractive element fabricated by laser-etching the surface of a transparent dielectric plate and a spatial angle selector. The diffractive element has a radiation damage threshold of 6 J/cm² at pulse width 3 ns. A three-dimensional intensity profile in the form of a parabola extending along one coordinate was experimentally produced; this intensity profile is used to compensate for spatial distortion of the beam in the main gain beamline of high-power neodymium laser systems.

© 2016 Optical Society of America

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