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Proceedings Paper

Good beam quality from a diamond-cooled Er:YAG laser
Author(s): Daniel O. Hogenboom; Minh Nguyen; Hsian P. Chou
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Paper Abstract

Erbium doped YAG, lasing at 1645 nm from a 1532 nm pump, is an intriguing alternative to wavelength shifted 1-micron lasers for eye-safe applications. In this paper, we will report on an end-pumped Er:YAG laser that employs diamond disks for heat extraction. Using an alternating arrangement of diamond and Er:YAG thin disks, heat flows from the gain material to the diamond along the optical axis and is then radially transmitted to a circulating cooling fluid at the perimeter of the diamond disks. This architecture allows larger diameter disks or rods to be used than conventional radial cooling architectures, thus allowing for higher powers through area scaling. This architecture also provides better beam quality for a given pulse energy. We have demonstrated excellent beam quality (M2=1.3) from a 10-Watt Er:YAG laser. We will also report on results of Q-switching and oscillator-amplifier experiments in a study of the well-known up-conversion process for relatively low dopant concentrations (0.5%-1.0% a.w. of Erbium).

Paper Details

Date Published: 12 May 2006
PDF: 10 pages
Proc. SPIE 6216, Laser Source and System Technology for Defense and Security II, 62160F (12 May 2006); doi: 10.1117/12.668994
Show Author Affiliations
Daniel O. Hogenboom, Textron Systems (United States)
Minh Nguyen, Textron Systems (United States)
Hsian P. Chou, Textron Systems (United States)

Published in SPIE Proceedings Vol. 6216:
Laser Source and System Technology for Defense and Security II
Gary L. Wood; Mark A. Dubinskii, Editor(s)

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