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Proceedings Paper

Time-dependent model of eye-safe erbium-doped YAG laser
Author(s): Bahram Zandi; John B. Gruber; Anmol S. Nijjar; Robert C. Lee; Marly B. Camargo
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Paper Abstract

We have developed a time dependent model for the eye-safe laser emission at 1.6&mgr;m, representing transitions from the manifolds 4I13/2 to 4I15/2 of trivalent Er-doped YAG (Y3Al5O12). The model is based on a set of coupled first-order differential equations (rate equations) that describe the laser kinetics of this quasi-three level laser system. Also called zero-dimensional (0-D) equations, these equations are time only dependent with no spatial dimension dependency. The model is anchored to experimental results including the experimental Stark levels that are populated according to a Boltzmann distribution at room temperature. Emission cross section parameters are calculated using reciprocity methods from experimental absorption cross sections. A MATLAB code is written and the equations are solved numerically for output power and slope efficiency and threshold. The results are useful with significant progress towards predicting the published experimental laser data. This model can be optimized for its parameters such as output coupler reflectivity, ion concentration, etc and used for other hosts.

Paper Details

Date Published: 10 May 2007
PDF: 7 pages
Proc. SPIE 6552, Laser Source Technology for Defense and Security III, 655217 (10 May 2007); doi: 10.1117/12.719934
Show Author Affiliations
Bahram Zandi, ARL/Adelphi Lab. Ctr. (United States)
John B. Gruber, Univ. of Texas at San Antonio (United States)
Anmol S. Nijjar, nLight Corp. (United States)
Robert C. Lee, Georgia Institute of Technology (United States)
Marly B. Camargo, ARL/Adelphi Lab. Ctr. (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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