Wavefront degradation of a 200 TW laser from heat-induced deformation of in-vacuum compressor gratings
Optics Express2018Vol. 26(10), pp. 13061–13061
Citations Over TimeTop 10% of 2018 papers
Vincent Leroux, Spencer W. Jolly, Matthias Schnepp, Timo Eichner, Sören Jalas, Manuel Kirchen, Philipp Messner, Christian Werle, Paul Winkler, Andreas R. Maier
Abstract
High-repetition-rate high-power laser systems induce a high average power heat deposition into the gold-coated diffraction gratings. To study the effects of the thermal expansion of in-vacuum Pyrex gratings on the laser properties, we scan the pulse energy and repetition rate of a 200 TW laser system while monitoring the laser wavefront. Through the measured changes in laser divergence and focusability, we define an average power limit below which the in-vacuum compressor can be used with no degradation of the laser focus quality.
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