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Proceedings Paper

Modeling a diode-pumped Er:Yb:glass laser with Co2+:spinel passive Q-switch
Author(s): Anmol S. Nijjar; John B. Gruber; Vikrum S. Nijjar; Stephen R. Chinn; Mark S. Bowers
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Paper Abstract

In order to develop an efficient eye-safe laser, operating in the 1.53μm region, we have written software that models the performance of a passively Q-switched Er:Yb:glass laser with a divalent cobalt Co2+:spinel saturable absorber. At present we have completed a 0D model for which we developed a set of coupled first order differential equations to describe the laser dynamics. These equations represent a two-level Yb3+ diode pump scheme, a five-level Er3+ gain medium, and a three-level Co2+ Q-switch. The model takes into account cooperative upconversion and excited state absorption (ESA) in both the gain and absorber media. Input parameters for the rate equations such as ion concentrations, cross sections, and lifetimes are obtained from experimental and published data. These parameters can be easily varied via a graphical user interface (GUI) that was developed for the model. A study comparing laser characteristics such as pulse energies, peak power, and pulsewidths (FWHM) is carried out between our model and experimental data. Future work will focus on a 1D model which introduces the spatial variation of the pump and laser beam within the cavity.

Paper Details

Date Published: 27 April 2005
PDF: 11 pages
Proc. SPIE 5707, Solid State Lasers XIV: Technology and Devices, (27 April 2005); doi: 10.1117/12.591292
Show Author Affiliations
Anmol S. Nijjar, San Jose State Univ. (United States)
John B. Gruber, San Jose State Univ. (United States)
Vikrum S. Nijjar, Univ. of California/San Diego (United States)
Stephen R. Chinn, U.S. Army Night Vision and Electronic Sensors Directorate (United States)
Mark S. Bowers, Aculight Corp. (United States)

Published in SPIE Proceedings Vol. 5707:
Solid State Lasers XIV: Technology and Devices
Hanna J. Hoffman; Ramesh K. Shori, Editor(s)

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