The temperature distribution and thermomechanical strains in passively Q-switched YAG:Nd3+/YAG:Cr4+ and GGG:Nd3+/GGG:Cr4+ microchip lasers

The heat processes in microchip Nd 3+ :YAG- and Nd 3+ :GGG-lasers passively Q-switched by Cr 4+ :YAG and Cr 4+ :GGG absorbers are considered. The specific heat power is determined from the system of rate equations described the processes of generation/absorption of laser radiation and generation of...

Full description

Saved in:
Bibliographic Details
Main Authors: Buryy, O.A., Izhnin, O.I., Syvorotka, I.I., Syvorotka, I.M., Izhnin, I.I., Sugak, D.Yu, Ubizskii, S.B., Vakiv, M.M.
Format: Conference Proceeding
Language:English
Subjects:
Absorption
Capacitive sensors
Chromium
Equations
gadolinium-gallium garnet
heat conductivity equation
microchip laser
Neodymium
Power generation
Power lasers
Space heating
Temperature distribution
Thermomechanical processes
yttrium-aluminium garnet
Online Access:Request full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The heat processes in microchip Nd 3+ :YAG- and Nd 3+ :GGG-lasers passively Q-switched by Cr 4+ :YAG and Cr 4+ :GGG absorbers are considered. The specific heat power is determined from the system of rate equations described the processes of generation/absorption of laser radiation and generation of heat both in the generation medium and the absorber. At known time dependences and space distributions of the specific heat power the distributions of the temperature in both lasers are determined from the heat conduction equation. Based on the distributions of the temperature, the thermo-mechanical strains are estimated. It is shown that maximal values of the thermomechanical strains in GGG-based laser are in ~1.5 times higher than in YAG-based one. Even at the significant heat power the maximal values of the thermo-mechanical strains for both crystals are 4-6 times lower than their limiting values.
DOI:10.1109/LFNM.2008.4670349