DocumentCode
3345113
Title
The temperature distribution and thermomechanical strains in passively Q-switched YAG:Nd3+/YAG:Cr4+ and GGG:Nd3+/GGG:Cr4+ microchip lasers
Author
Buryy, O.A. ; Izhnin, O.I. ; Syvorotka, I.I. ; Syvorotka, I.M. ; Izhnin, I.I. ; Sugak, D.Yu. ; Ubizskii, S.B. ; Vakiv, M.M.
Author_Institution
Inst. of Telecommun., Lviv Polytech. Nat. Univ., Lviv
fYear
2008
fDate
2-4 Oct. 2008
Firstpage
54
Lastpage
56
Abstract
The heat processes in microchip Nd3+:YAG- and Nd3+:GGG-lasers passively Q-switched by Cr4+:YAG and Cr4+: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.
Keywords
Q-switching; chromium; gadolinium compounds; garnets; heat conduction; microchip lasers; neodymium; specific heat; thermomechanical treatment; GdGG:Cr; GdGG:Nd; YAG:Cr; YAG:Nd; heat conduction; heat processes; laser radiation; passively Q-switched microchip lasers; rate equations; specific heat; temperature distribution; thermomechanical strains; Absorption; Capacitive sensors; Chromium; Equations; Neodymium; Power generation; Power lasers; Space heating; Temperature distribution; Thermomechanical processes; gadolinium-gallium garnet; heat conductivity equation; microchip laser; yttrium-aluminium garnet;
fLanguage
English
Publisher
ieee
Conference_Titel
Laser and Fiber-Optical Networks Modeling, 2008. LFNM 2008. 9th International Conference on
Conference_Location
Crimea
Print_ISBN
978-1-4244-2526-6
Electronic_ISBN
978-1-4244-2527-3
Type
conf
DOI
10.1109/LFNM.2008.4670349
Filename
4670349
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