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- W2023447672 abstract "The use of Fe:ZnSe polycrystals as passive Q-switches for the Er:Cr:YSGG laser operating at 2.8&mgr;m is introduced. Fe:ZnSe samples with 1-7cm<sup>-1</sup> coefficients of absorption were prepared using thermal diffusion of iron in CVD grown polycrystalline ZnSe. A flashlamp pumped Er:Cr:YSGG laser with a variable (40 - 80% reflectivity) output coupler (OC) was used as a test bed for passive Q-switching. Using a 90% initial transmission Fe:ZnSe placed at the Brewster angle we obtained a single giant pulse lasing with a pulse duration of ~65 ns and a maximum output of 13 mJ under 30 J of flashlamp pump. Multi-pulse (19 pulses) output was obtained with 85 mJ total output energy at a pump energy of 30 J. The saturation curve of Fe:ZnSe was measured. Fitting this data with a theoretical model results in absorption crosssection of 0.56 × 10<sup>-18</sup> cm<sup>2</sup>, which is close to the value of the absorption cross-section obtained from spectroscopic measurements (0.85 × 10-18 cm<sup>2</sup> at 2.8 &mgr;m)." @default.
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- W2023447672 date "2007-02-08" @default.
- W2023447672 modified "2023-10-16" @default.
- W2023447672 title "Fe:ZnSe passive Q-switching of 2.8-μm Er:Cr:YSGG laser cavity" @default.
- W2023447672 doi "https://doi.org/10.1117/12.701289" @default.
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