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Proceedings Paper

Highly efficient resonantly pumped Er:YAG large area waveguide laser with diffraction limited output
Author(s): N. Ter-Gabrielyan; V. Fromzel; Mark Dubinskii; X. Mu; H. Meissner
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Paper Abstract

We demonstrated nearly a quantum defect limited CW operation of a 41-mm-long Er:YAG large area crystalline waveguide laser with a diffraction limited output, which was resonantly pumped by a fiber laser at 1532 nm. Using a Er(0.25%):YAG, 62 μm x 62 μm waveguide, surrounded by a 3 x 5 mm rectangular cladding of undoped YAG, an output power of 9.1 W with slope efficiency of 92.8% has been achieved. The output laser beam had a Gaussian profile with a ~ 2.8 x 10-2 rad divergence, which is in good agreement with the divergence expected from a waveguide with a low NA value. The waveguide laser operated simultaneously at two wavelengths, 1617 nm and 1645 nm, when the transmission of the laser cavity output coupler was less than 20-25%, and operated only at 1617 nm when the laser output mirror had a higher transmission.

Paper Details

Date Published: 23 May 2013
PDF: 6 pages
Proc. SPIE 8733, Laser Technology for Defense and Security IX, 87330L (23 May 2013); doi: 10.1117/12.1518452
Show Author Affiliations
N. Ter-Gabrielyan, U.S. Army Research Lab. (United States)
V. Fromzel, U.S. Army Research Lab. (United States)
Mark Dubinskii, U.S. Army Research Lab. (United States)
X. Mu, ONYX Optics, Inc. (United States)
H. Meissner, Onyx Optics, Inc. (United States)


Published in SPIE Proceedings Vol. 8733:
Laser Technology for Defense and Security IX
Mark Dubinskii; Stephen G. Post, Editor(s)

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