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Use of intracavity adaptive optics in solid-State lasers operation at 1um

Lubeigt, W. and VanGrol, P. and Valentine, G.J. and Burns, D. (2003) Use of intracavity adaptive optics in solid-State lasers operation at 1um. In: Adaptive Optics for Industry and Medicine: Proceedings of the 4th International Workshop Münster, Germany, Oct. 19-24, 2003. Springer Proceedings in Physics, 102 . Springer-Verlag, Berlin, Germany, pp. 217-227. ISBN 978-3-540-23978-9

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Abstract

An intracavity 37-element deformable membrane mirror (DMM) has been used in order to control the transverse mode profile of a diode-pumped solidstate laser. Automatic spatial mode and output power optimisation of Nd:YVO4 end-pumped and Nd:YAlO side-pumped lasers are demonstrated using a closed-loop genetic algorithm. Transverse mode and power optimisation of a diode-pumped, grazing incidence Nd:GdVO4 laser has been performed successfully. The optimisation procedure featured a genetic algorithm ensuring the global maximum is attained. Using a Michelson interferometer with the DMM operating intracavity, the DMM was found to present negligible deformation when used with a power density of 115W/cm2 but noticeable deformation appeared with a power density of 1.25 kW/cm2.