Laser diode beam shaping with GRIN lenses using the twisted beam approach and its application in pumping of a solid-state laser |
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Authors: | Sandra Johansson,Valdas Pasiskevicus,René e Hansson |
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Affiliation: | a Laser Physics, Department of Physics, Royal Institute of Technology, 106 91 Stockholm, Sweden b Cobolt AB, Kräftriket 8, 104 05 Stockholm, Sweden |
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Abstract: | We report a novel beam shaping method for laser diodes based on the concept of twisted Gaussian Schell-model beams using GRIN lenses. This method enables a more symmetric pump as well as a compact setup for pumping of solid-state lasers. In the experiment with a standard 2 W diode, the beam quality factors in the two orthogonal directions were equalized to and , respectively, which pumped an intra-cavity frequency-doubled Nd:YAG laser at 946 nm with an output of 28 mW at 473 nm. |
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