Open AccessSimulation of the temperature-beam coupling in frequency doubling of BBO crystals
Author(s) -
Yan-Qin Chang,
Tao Shen,
Yu. A. Andreev,
A. V. Shaĭduko,
Jinzhe Huang,
Wei Hong
Publication year - 2010
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.59.6243
Subject(s) - energy conversion efficiency , materials science , crystal (programming language) , beam (structure) , second harmonic generation , laser beam quality , optics , compensation (psychology) , coupling (piping) , power (physics) , harmonic , thermal , laser , physics , optoelectronics , laser beams , acoustics , thermodynamics , computer science , psychology , psychoanalysis , metallurgy , programming language
First, a frequency doubling model with 4-dimensional temperature-beam coupling was proposed in this paper on the assumption of an infinite transverse crystal section. The frequency doubling process, by using analytical formula and iterative method, was simulated in the BBO crystal pumped by a laser with watt-level power. The amplitudes and conversion efficiencies of the fundamental, and harmonic beams and temperature distributions were obtained, together with the time evolution of temperature field and beam intensities. The influence of the pumping power and crystal length on the conversion efficiency and temperature field was analyzed secondly. The results finally showed that the temperature distribution has great influence on the conversion efficiency and beam quality. A compensation for the phase mismatch induced by temperature can well improve the reduction of conversion efficiency induced by the thermal effect, which thus should be considered in practice.