Comparison of Laser Induced Thermal Fracture between Polycrystalline Ceramic and Crystal Nd:YAGOptics Letters (2014)
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 2√ times of the pump beam radius 𝑤0, 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 6.4±0.6 kW/cm2, nearly 64% higher than that of the crystals (3.9±0.3 kW/cm2). The deduced thermal fracture stress for ceramic was 386±50 MPa, which is 64% higher than that of the crystals (235±16 MPa).
Citation InformationYu Shen, Wen-bin Liu, Nan Zong, Jiang Li, et al.. "Comparison of Laser Induced Thermal Fracture between Polycrystalline Ceramic and Crystal Nd:YAG" Optics Letters Vol. 39 Iss. 7 (2014) p. 1 - 3
Available at: http://works.bepress.com/jing-yuan_zhang/28/