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Temperature distribution of edge diode-pumped laser slab

M. H. MOGHTADER DINDARLU1,* , M. KAVOSH TEHRANI2, GH. SOLOOKINEJAD3, A. MALEKI2, M. JABBARI4, M. NAFAR4, R. TOFIGH MOVALU2

Affiliation

  1. Young Researchers and Elite Club, Marvdasht branch, Islamic Azad University, Marvdasht, Iran
  2. Institute of Optics and Laser, Malek-ashtar University of Technology, Shahin Shahr, Postal Code: 83145/115, Iran
  3. Department of Physics, Marvdasht branch, Islamic Azad University, Marvdasht, Iran
  4. Department of Electronic Engineering, Marvdasht branch, Islamic Azad University, Marvdasht, Iran

Abstract

Since determination of temperature distribution inside the laser gain medium is essential for the evaluation of induced thermo-optic effects on laser operation, in this paper, an analytical model is presented for temperature distribution of edge diode-pumped laser slab by Green’s function method. To solve the heat equation, Robin boundary conditions is considered because four lateral faces of slab are cooled by water. For an example, the 2D and 3D temperature distributions are plotted and our analytical model is validated by numerical solution based on Finite Element Method (FEM). The results show that our model has very good agreement with numerical solution. Furthermore, dependence of the temperature distribution on absorbed pump power is shown..

Keywords

Temperature distribution, Laser slab, Edge-pumping, Robin boundary conditions.

Citation

M. H. MOGHTADER DINDARLU, M. KAVOSH TEHRANI, GH. SOLOOKINEJAD, A. MALEKI, M. JABBARI, M. NAFAR, R. TOFIGH MOVALU, Temperature distribution of edge diode-pumped laser slab, Optoelectronics and Advanced Materials - Rapid Communications, 12, 7-8, July-August 2018, pp.369-376 (2018).

Submitted at: Feb. 4, 2018

Accepted at: Aug. 9, 2018