Open AccessFracture characteristics of ceramic Nd:YAG
Author(s) -
Duck-Lae Kim,
Byung-Tai Kim
Publication year - 2014
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.22.011331
Subject(s) - materials science , laser , lasing threshold , ceramic , composite material , optics , diode pumped solid state laser , laser pumping , optoelectronics , wavelength , physics
The fracture of laser material in a ceramic Nd:YAG laser pumped by a fiber-coupled laser diode was analyzed. The fracture of the laser material was found to occur when the critical temperature difference between the center of the material and the surface exceeded 355°C. To quantitatively analyze the material fracture, the heat-generation length and heat-generation radius of the laser material were calculated and the critical pump power per unit volume was examined. Under lasing and non-lasing conditions, the fracture of laser material occurred at 24.41 kW/cm(3) and 19.53 kW/cm(3), respectively, for 2 at.% ceramic Nd:YAG and 25.57 kW/cm(3) and 20.47 kW/cm(3), respectively, for 4 at.% ceramic Nd:YAG.