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Proceedings Paper

Efficiency optimization of 3-µm Q-switched lasers based on Er-doped crystalline materials
Author(s): Nikolay Ter-Gabrielyan; Viktor Fromzel
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Paper Abstract

We show that efficiency, average power and thermal loading of Er-doped 3 μm Q-switched lasers can be significantly improved by enabling free-running upper- and lower cascade lasing at the 4S3/24I9/2 and the 4I13/24I15/2 transitions. Using Er:YLF as an example, we numerically and experimentally demonstrate, how overall performance of the cascade laser depends on Er concentration and pumping regimes. The best results were obtained with 1% of Er-doping of YLF. While the influence of the lower cascade (1.62 μm) vanishes after ~ 2% of Er3+, the upper cascade (1.73 μm) continues to provide some thermal relief even at very high Er-doping level The experimental results with 1% and 2% of Er-doped YLF, based in a split-channel cavity supporting cascade-assisted Q-switching, are in a good agreement with conclusions of theoretical modeling.

Paper Details

Date Published: 16 March 2020
PDF: 8 pages
Proc. SPIE 11259, Solid State Lasers XXIX: Technology and Devices, 112590A (16 March 2020); doi: 10.1117/12.2546957
Show Author Affiliations
Nikolay Ter-Gabrielyan, U.S. Army Combat Capabilities Development Command (United States)
Viktor Fromzel, U.S. Army Combat Capabilities Development Command (United States)


Published in SPIE Proceedings Vol. 11259:
Solid State Lasers XXIX: Technology and Devices
W. Andrew Clarkson; Ramesh K. Shori, Editor(s)

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