Title :
Numerical calculation of temperature-dependent absorption in end pumped Yb:YAG thin disk laser
Author :
Toroghi, Seyfollah ; Aas, Mehdi ; Jafari, Ahmad Khayat
Author_Institution :
Laser & Opt. Dept., Bonab Univ. of Technol., Bonab
Abstract :
In this paper, the dependence of absorption power on the temperature in an end pumped Yb:YAG quasi-three level thin disk laser is calculated. Here, we have used the temperature-dependent form of Boltzmann occupation factors, absorption cross section and thermal conductivity of the Yb:YAG crystal. A Monte Carlo ray tracing code developed by our group and a 2D finite element analysis (FEA) with the ANSYS package are used to calculate the absorption power and the temperature distribution inside the Yb:YAG thin disk laser respectively. An iterative method used for combination of these two methods to achieve the temperature-dependent absorption power.
Keywords :
Monte Carlo methods; absorption coefficients; finite element analysis; iterative methods; laser theory; optical pumping; ray tracing; solid lasers; temperature distribution; thermal conductivity; ytterbium; 2D finite element analysis; ANSYS package; Boltzmann occupation factors; Monte Carlo ray tracing code; YAG:Yb; absorption cross section; end pumped thin disk laser; iterative method; quasithree level laser; temperature distribution; temperature-dependent absorption; thermal conductivity; Absorption; Finite element methods; Laser excitation; Monte Carlo methods; Power lasers; Pump lasers; Ray tracing; Temperature dependence; Thermal conductivity; Thermal factors; FEM; Monte Carlo ray tracing; Yb:YAG; absorption coefficient; thin disk laser;
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
DOI :
10.1109/LFNM.2008.4670381
