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  • Received: Aug. 8, 2019

    Accepted: Aug. 30, 2019

    Posted: Dec. 3, 2019

    Published Online: Dec. 3, 2019

    The Author Email: Chao Shen (cshen@aiofm.ac.cn), Yujun Zhang (yjzhang@aiofm.ac.cn)

    DOI: 10.3788/COL201917.123002

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    Chao Shen, Nanjing Zhao, Jaka Pribošek, Mingjun Ma, Li Fang, Xingjiu Huang, Yujun Zhang. Characteristics of optical emission during laser-induced damage events of fused silica[J]. Chinese Optics Letters, 2019, 17(12): 123002

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Chinese Optics Letters, Vol. 17, Issue 12, 123002 (2019)

Characteristics of optical emission during laser-induced damage events of fused silica

Chao Shen1,2,*, Nanjing Zhao1,2, Jaka Pribošek3, Mingjun Ma1,2, Li Fang1,2, Xingjiu Huang4, and Yujun Zhang5,**

Author Affiliations

  • 1Key Laboratory of Environmental Optics & Technology, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China
  • 2Key Laboratory of Optical Monitoring Technology for Environment, Hefei 230031, China
  • 3Carinthian Tech Research, 9524 Villach, Austria
  • 4Institute of Intelligent Machines, Chinese Academy of Sciences, Hefei 230031, China
  • 5State Key Laboratory of Pulsed Power Laser Technology, National University of Defense Technology, Hefei 230037, China

Abstract

Spontaneous optical emission properties of laser-produced plasma during laser damage events at input and exit surfaces of fused silica were retrieved and compared. We show that plasma at the input surface is much larger in size and exhibits significantly higher electron number density and excitation temperature, even when smaller laser energy was used. This effect was attributed to the stronger laser–plasma coupling at the input surface. In addition, a strong continuum background containing three peaks at 1.3 eV, 1.9 eV, and 2.2 eV was observed at the exit surface, and possible origins for this effect are also discussed.