23 February 2009 Beam quality dependent SHG using edge-emitting lasers and a 50 mm bulk PPLN crystal
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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.
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Mirko Uebernickel, Gunnar Blume, Christian Fiebig, Christian Kaspari, David Feise, Katrin Paschke, Arnim Ginolas, Reiner Güther, Bernd Eppich, Götz Erbert, "Beam quality dependent SHG using edge-emitting lasers and a 50 mm bulk PPLN crystal", Proc. SPIE 7197, Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications VIII, 71970F (23 February 2009); doi: 10.1117/12.807429; https://doi.org/10.1117/12.807429
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