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Proceedings Paper

A 400W cryogenic Er:YAG laser at 1645 nm
Author(s): Scott D. Setzler; Michael J. Shaw; Mark J. Kukla; Josef R. Unternahrer; Kenneth M. Dinndorf; James A. Beattie; Evan P. Chicklis
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Paper Abstract

We report on the design and characterization of a cryogenically cooled, resonantly pumped Er:YAG slab laser operating at 1645 nm. The Er:YAG slab is conductively cooled by liquid nitrogen and face-pumped by a 1.4 kW diode array operating at 1452 nm. The slab is transversely extracted in a highly multi-mode oscillator, producing 386 W of cw output power and 420 W of quasi-cw power at 50% duty cycle. We have measured 45% slope efficiency and 39% optical conversion efficiency (relative to incident pump). The laser has also been configured to operate with low-order multi-mode output, producing over 250 W of quasi-cw power at 25% duty cycle, and has been Q-switched at repetition rates as low as 10 kHz.

Paper Details

Date Published: 4 May 2010
PDF: 7 pages
Proc. SPIE 7686, Laser Technology for Defense and Security VI, 76860C (4 May 2010); doi: 10.1117/12.855614
Show Author Affiliations
Scott D. Setzler, BAE Systems, Inc. (United States)
Michael J. Shaw, BAE Systems, Inc. (United States)
Mark J. Kukla, BAE Systems, Inc. (United States)
Josef R. Unternahrer, BAE Systems, Inc. (United States)
Kenneth M. Dinndorf, BAE Systems, Inc. (United States)
James A. Beattie, BAE Systems, Inc. (United States)
Evan P. Chicklis, BAE Systems, Inc. (United States)

Published in SPIE Proceedings Vol. 7686:
Laser Technology for Defense and Security VI
Mark Dubinskii; Stephen G. Post, Editor(s)

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