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Proceedings Paper

Compact and efficient 2µm Tm:YAP lasers with mechanical or passive Q-switching
Author(s): Brian Cole; Lew Goldberg
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Paper Abstract

We describe compact and efficient Q-switched diode-pumped, Tm:YAP lasers operating at 1.94μm. Laser CW and Q-switched performance is compared, using both compact mechanical as well as passive Q-switching. For passive Q-switching using a Cr:ZnS saturable absorber (unsaturated transmission of 95%), the laser produced 0.5mJ pulses with an average power of 4.4W and 6.5kW peak power, and had an optical efficiency of 30%. A resonant mirror mechanical Q-switch resulted in a 4 kHz PRF pulse train, with an optical slope efficiency of 52% and an optical-to-optical conversion efficiency of 41%. The laser generated 1.5 mJ, 45 ns FWHM, 33kW peak power pulses, and 6.2W of average output. A second mechanically Q-switched laser operating at 10 kHz PRF produced 1mJ, 35kW peak power pulses, generating 11W average power with an optical efficiency of 46%, and a beam quality of 1.4x diffraction limit.

Paper Details

Date Published: 17 February 2017
PDF: 9 pages
Proc. SPIE 10082, Solid State Lasers XXVI: Technology and Devices, 100820B (17 February 2017); doi: 10.1117/12.2253915
Show Author Affiliations
Brian Cole, U.S. Army RDECOM CERDEC (United States)
Lew Goldberg, U.S. Army RDECOM CERDEC (United States)

Published in SPIE Proceedings Vol. 10082:
Solid State Lasers XXVI: Technology and Devices
W. Andrew Clarkson; Ramesh K. Shori, Editor(s)

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