<abstract xmlns="http://www.w3.org/1999/xhtml">The thermo-optic coupling process of second harmonic generation was numerically simulated in ZnGeP2 crystals pumped by a pulsed CO2 laser at the wavelength of 9.6 μm, under the strong and weak cooling conditions. The conversion efficiencies, temperature distributions were calculated during the evolution of the thermo-optic coupling. The results showed that the thermooptic coupling was weak in the strong cooling condition, which nearly did not disturb the conversion processes and temperature distribution, while in the weak cooling case, the temperature distribution showed a great influence on the conversion efficiency and light intensity. Finally, it was found that compensation of the phase mismatch induced by the thermal effect can well recover the conversion efficiency.</abstract>

The thermo-optic coupling process of second harmonic generation was numerically simulated in ZnGeP2 crystals pumped by a pulsed CO2 laser at the wavelength of 9.6 μm, under the strong and weak cooling conditions. The conversion efficiencies, temperature distributions were calculated during the evolution of the thermo-optic coupling. The results showed that the thermooptic coupling was weak in the strong cooling condition, which nearly did not disturb the conversion processes and temperature distribution, while in the weak cooling case, the temperature distribution showed a great influence on the conversion efficiency and light intensity. Finally, it was found that compensation of the phase mismatch induced by the thermal effect can well recover the conversion efficiency.

Simulation of the thermo-optic coupling effect in mid-infrared second harmonic generation of ZnGeP2 crystal

College of Electronic Engineering, Heilongjiang University, Harbin 150080, People’s Republic of China

Department of Optoelectric Information Science and Engineering, Harbin University of Science and Technology, Harbin 150080, People’s Republic of China

Institute of Monitoring of Climatic and Ecological Systems SB RAS, Academicheskii Avenue, 10/3, Tomsk 634055, Russia

Bauman Moscow State Technical University, 5, 2nd Bauman Str., Moscow 105005, Russia

Materials Science-Poland

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Simulation of the thermo-optic coupling effect in mid-infrared second harmonic generation of ZnGeP crystal

The thermo-optic coupling process of second harmonic generation was numerically simulated in ZnGeP2 crystals pumped by a pulsed CO2 laser at the wavelength of...

Simulation of the thermo-optic coupling effect in mid-infrared second harmonic generation of ZnGeP₂ crystal

Published Online: Jul 11, 2015

Page range: 391 - 396

Received: Nov 16, 2014

Accepted: Jan 30, 2015

DOI: https://doi.org/10.1515/msp-2015-0046

© 2015

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.