Laser beam propagation in gain media

Jan Karol Jabczynski; Jacek Kwiatkowski; Waldemar Zendzian

doi:10.1117/12.545151

21 November 2003 Laser beam propagation in gain media

Jan Karol Jabczynski, Jacek Kwiatkowski, Waldemar Zendzian

Proceedings Volume 5259, 13th Polish-Czech-Slovak Conference on Wave and Quantum Aspects of Contemporary Optics; (2003) https://doi.org/10.1117/12.545151
Event: 13th Polish-Czech-Slovak Conference on Wave and Quantum Aspects of contemporary Optics, 2002, Krzyzowa, Poland

Abstract

Two models of gain and thermal guiding effects were derived. In the first one the complex ABCD matrix for a crystal under gain and thermal guiding was applied to describe the operation of microchip near threshold. In the second one, the simple iterative procedure was proposed to calculate effective fundamental mode parameters of a cavity under thermal and gain guiding for given bare cavity ABCD matrix and pumping parameters, including gain saturation, passive cavity losses and reabsorption ones. The influence of gain guiding effects causes changes of waist width in the range up to 50% comparing to expectations derived from thermal guiding theory. Application of such method for resonators of passively Q switched lasers was proposed. Results of calculations for microchips were verified with experiment.

Citation Download Citation

Jan Karol Jabczynski, Jacek Kwiatkowski, and Waldemar Zendzian "Laser beam propagation in gain media", Proc. SPIE 5259, 13th Polish-Czech-Slovak Conference on Wave and Quantum Aspects of Contemporary Optics, (21 November 2003); https://doi.org/10.1117/12.545151

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KEYWORDS

Thermal effects

Thermal modeling

Gaussian beams

Refractive index

Diffraction

Laser beam propagation

Mirrors

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