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Opt Express. 2011 Mar 14;19(6):5093-104. doi: 10.1364/OE.19.005093.

High-power radially polarized Yb:YAG thin-disk laser with high efficiency.

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1
Institut für Strahlwerkzeuge (IFSW), University of Stuttgart, Pfaffenwaldring 43, D-70569 Stuttgart, Germany. abdou.ahmed@ifsw.uni-stuttgart.de

Abstract

Radially polarized beams with an output power of 275 W, M2=2.3 and an efficiency of about 52.5% were generated from an Yb:YAG thin-disk laser. An intra-cavity circular resonant waveguide grating was used as a polarization selective mirror inside the laser cavity. We report on the design and the fabrication using a scanning beam interference lithography system and discuss the calculated and measured performances of the presented polarizing grating mirrors.

PMID:
21445144
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