Abstract
Continuous wave 808 nm pump laser-induced thermal damage of polycrystalline transparent ceramic and crystalline Nd:YAG materials was investigated both experimentally and theoretically. The measured temperature agrees well with the theoretical simulation, and the maximum hoop stresses occur on the incident facet of the end-pumped rod at about times of the pump beam radius , where the temperature gradient is the highest and the damage occurs first at this location. The fracture-limited laser intensity of ceramics was experimentally measured to be , nearly 64% higher than that of the crystals (). The deduced thermal fracture stress for ceramic was , which is 64% higher than that of the crystals ().
© 2014 Optical Society of America
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