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Optical Engineering

Predicted performance limits of yttrium aluminum garnet fiber lasers
Author(s): Triplicane A. Parthasarathy; Randall S. Hay; Geoff E. Fair; Frank Kenneth Hopkins
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Paper Abstract

The effect of various parameters that limit the performance of fiber lasers are calculated for yttrium aluminum garnet (YAG) as the fiber core. The optimum core diameter, the optimum fiber length, and the corresponding output power capability are determined for a variety of optical and structural parameters of YAG, based on available data in the literature to date. It is shown that a conservative limit for YAG fiber laser is 6 kW per fiber in multimode operation, compared to 1.8 kW for a silica-based fiber laser. Furthermore, it is shown that if stimulated brillouin scattering gain, a key limiting parameter, is <10−12 m/W in YAG, as a recent publication suggests, the maximum output power is 30 kW per fiber without a significant increase in fiber core diameter. Similar gains are predicted for single-mode operation, although with much lower output power limits. A parametric study shows the relative merits of improving on various optical parameters.

Paper Details

Date Published: 1 September 2010
PDF: 8 pages
Opt. Eng. 49(9) 094302 doi: 10.1117/1.3485758
Published in: Optical Engineering Volume 49, Issue 9
Show Author Affiliations
Triplicane A. Parthasarathy, UES, Inc. (United States)
Randall S. Hay, Air Force Research Lab. (United States)
Geoff E. Fair, Air Force Research Lab. (United States)
Frank Kenneth Hopkins, Air Force Research Lab. (United States)

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