Modeling a diode-pumped Er:Yb:glass laser with Co<sup>2+</sup>:spinel passive Q-switch

Anmol S. Nijjar; John B. Gruber; Vikrum S. Nijjar; Stephen R. Chinn; Mark S. Bowers

doi:10.1117/12.591292

27 April 2005 Modeling a diode-pumped Er:Yb:glass laser with Co²⁺:spinel passive Q-switch

Anmol S. Nijjar, John B. Gruber, Vikrum S. Nijjar, Stephen R. Chinn, Mark S. Bowers

Proceedings Volume 5707, Solid State Lasers XIV: Technology and Devices; (2005) https://doi.org/10.1117/12.591292
Event: Lasers and Applications in Science and Engineering, 2005, San Jose, California, United States

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.

Citation Download Citation

Anmol S. Nijjar, John B. Gruber, Vikrum S. Nijjar, Stephen R. Chinn, and Mark S. Bowers "Modeling a diode-pumped Er:Yb:glass laser with Co²⁺:spinel passive Q-switch", Proc. SPIE 5707, Solid State Lasers XIV: Technology and Devices, (27 April 2005); https://doi.org/10.1117/12.591292

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