Open AccessStudy of the key factors affecting temperature of spectral-beam-combination grating
Author(s) -
Jie Xu,
Junming Chen,
Peng Chen,
Yonglu Wang,
Yibin Zhang,
Fanzuo Kong,
Yufeng Jin,
Jianda Shao
Publication year - 2018
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.26.021675
Subject(s) - materials science , grating , optics , laser beam quality , beam (structure) , laser , radiance , thermal conductivity , optoelectronics , dielectric , laser beams , physics , composite material
Spectral beam combination is a promising method for high-radiance lasers with a good beam quality. With the increase of the combination power, the temperature of the multilayer dielectric grating (MDG) unavoidably increases, leading to surface heat distortion of the MDG. In this study, the temperature field equation of the MDG is derived, and the key factors influencing the MDG temperature are investigated. Furthermore, experiments are performed to confirm the calculation results. The results reveal that the increase of the thickness of the substrate can improve the power tolerance of the MDG but delays the stable output of beam laser; use of a substrate material with a large thermal conductivity can greatly reduce the temperature of the MDG.