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Comparison of Laser Induced Thermal Fracture between Polycrystalline Ceramic and Crystal Nd:YAG
Optics Letters (2014)
  • Yu Shen, Chinese Academy of Sciences
  • Wen-bin Liu, Chinese Academy of Sciences
  • Nan Zong, Chinese Academy of Sciences
  • Jiang Li, Chinese Academy of Sciences
  • Yong Bo, Chinese Academy of Sciences
  • Xi-qi Feng, Chinese Academy of Sciences
  • Fang-Qin Li, Chinese Academy of Sciences
  • Yu-Bai Pan, Chinese Academy of Sciences
  • Ya-Ding Guo, Chinese Academy of Sciences
  • Peng-yuan Wang, Chinese Academy of Sciences
  • Wei Tu, Chinese Academy of Sciences
  • Qin-Jun Peng, Chinese Academy of Sciences
  • Jing-yuan Zhang, Chinese Academy of Sciences
  • Wenqiang Lei, Chinese Academy of Sciences
  • Da-Fu Cui, Chinese Academy of Sciences
  • Zu-Yan Xu, Chinese Academy of Sciences
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 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).


Keywords
  • Thermal,
  • Fracture,
  • Polycrystalline,
  • Ceramic,
  • Laser
Disciplines
Publication Date
2014
DOI
10.1364/OL.39.001965
Citation Information
Yu 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/