Laser induced modification of the thermo-optical properties of Nd:YAG crystal determined by thermal lens technique

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• 作者：S. Panahibakhsh ; S. Jelvani ; M. H. Maleki
• 关键词：Thermal lens ; Nd ; YAG crystal ; ArF laser ; Oxygen vacancy centers ; Thermo ; optical properties modification
• 刊名：Optical and Quantum Electronics
• 出版年：2015
• 出版时间：November 2015
• 年：2015
• 卷：47
• 期：11
• 页码：3647-3653
• 全文大小：819 KB
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• 作者单位：S. Panahibakhsh (1)
  S. Jelvani (1)
  M. H. Maleki (1)
  
  1. Laser and Optics Research School, Nuclear Science and Technology Research Institute, Tehran, 1439951113, Iran
  
• 刊物主题：Optics, Optoelectronics, Plasmonics and Optical Devices; Electrical Engineering; Characterization and Evaluation of Materials; Computer Communication Networks;
• 出版者：Springer US
• ISSN：1572-817X

文摘

A Nd:YAG single crystal thin disc sample was irradiated by 200 pulses of 193 nm wavelength ArF laser at 35 mJ cm鈭? laser fluence and 50 Hz repetition rate. The UV鈥揤is-NIR spectrum of the sample showed that the transmission has increased and the crystal quality has improved after the irradiation. A time-resolved mode mismatch dual beam thermal lens setup was used to determine thermo-optical properties of the Nd:YAG crystal before and after the irradiation. The results of the thermal lens (TL) experiment showed the thermal diffusion coefficient has been increased from 0.0459 to 0.0612 cm2 s鈭?. In addition, TL signal values of the irradiated crystal were obtained less than half of the TL signal values of un-irradiated crystal. The results show that low dose ArF laser irradiation improves thermo-optical properties of the Nd:YAG laser crystal. Keywords Thermal lens Nd:YAG crystal ArF laser Oxygen vacancy centers Thermo-optical properties modification