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Proceedings Paper

Latest developments in resonantly diode-pumped Er:YAG lasers
Author(s): Igor Kudryashov; Dmitri Garbuzov; Mark Dubinskii
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Paper Abstract

Significant performance improvement of the Er(0.5%):YAG diode pumped solid state laser (DPSSL) has been achieved by pump diode spectral narrowing via implementation of an external volumetric Bragg grating (VBG). Without spectral narrowing, with a pump path length of 15 mm, only 37% of 1532 nm pump was absorbed. After the VBG spectral narrowing, the absorption of the pumping radiation increased to 62 - 70%. As a result, the incident power threshold was reduced by a factor of 2.5, and the efficiency increased by a factor of 1.7, resulting in a slope efficiency of ~23 - 30%. A maximum of 51 W of CW power was obtained versus 31 W without the pump spectrum narrowing. More than 180 mJ QCW pulse output energy was obtained in a stable-unstable resonator configuration with a beam quality of M2 = 1.3 in the stable direction and M2 = 1.1 in the unstable direction. The measured slope efficiency was 0.138 J/J with a threshold energy of 0.91 J.

Paper Details

Date Published: 10 May 2007
PDF: 8 pages
Proc. SPIE 6552, Laser Source Technology for Defense and Security III, 65520K (10 May 2007); doi: 10.1117/12.721945
Show Author Affiliations
Igor Kudryashov, Princeton Lightwave Inc. (United States)
Dmitri Garbuzov, Princeton Lightwave Inc. (United States)
Mark Dubinskii, Army Research Lab. (United States)

Published in SPIE Proceedings Vol. 6552:
Laser Source Technology for Defense and Security III
Gary L. Wood; Mark A. Dubinskii, Editor(s)

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