Beam quality dependent SHG using edge-emitting lasers and a 50mm bulk PPLN crystal

Published in:
Proc. SPIE, vol. 7197, no. 71970F (2009).
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Abstract:
In this paper we present a study of the single pass normalized second harmonic generation (SHG) conversion efficiency as a function of the beam propagation factor M2 and the beam diameter in the lateral and vertical direction. It can be shown that an increase in M2 results in dramatic changes for the optimal focusing conditions, in comparison to the SHG with a Gaussian beam. Based on the results of the measurements we developed a model to simulate the focusing conditions for partial coherent beams.

Keywords:
SHG, Semiconductor lasers, Gauss-Schell-model

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