Modeling the Thermal Deformation of the Volume Bragg Grating in High-Power Beam Combining System
Volume bragg grating is the important element in spectral beam combining technique. However the thermal-induced distortion and temperature gradient make strong impact on the grating’s performance. In this paper, a model of five 3kW off resonator laser beams combining system is analyzed through Comsol. The z-displacement and temperature distributions with different boundary conditions have been shown. The results demonstrate that Comsol is a practical and useful tool to analyze the thermal problem in the gratings.
Yuhang Yang, Xilong Qu, Yiping Luo and Aimin Yang
L. L. Gao "Modeling the Thermal Deformation of the Volume Bragg Grating in High-Power Beam Combining System", Advanced Materials Research, Vol. 216, pp. 587-591, 2011