• Infrared and Laser Engineering
  • Vol. 45, Issue 7, 721004 (2016)
Zhou Chenghu11、*, Zhang Qiuhui1、2, Huang Mingming1, and Huang Quanzhen1
Author Affiliations
  • 1[in Chinese]
  • 2[in Chinese]
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    DOI: 10.3788/irla201645.0721004 Cite this Article
    Zhou Chenghu1, Zhang Qiuhui, Huang Mingming, Huang Quanzhen. Damage effects of impurity particles on film[J]. Infrared and Laser Engineering, 2016, 45(7): 721004 Copy Citation Text show less

    Abstract

    Laser-induced damage in optical film remains a great challenge in high power laser systems. The mechanism of inclusion damage to film had been studied: firstly, the film damage morphologies had been observed and then the effects of inclusions on film had been analyzed. The research results show that the damage effects of inclusions on film can be divided into thermodynamic effects, interference effects due to scattering and laser plasma effects, the combined action of those damage effects determine the characteristics of damage points. The effects above are closely related to the particles radius: for smaller radius, the deposited laser energy is less and temperature is lower, as the heat diffusion range is smaller and damage points are mainly due to the melting. While for larger radius, the energy deposition and temperature are higher, and the laser plasma can be formed easily and cause big ablated pits.
    Zhou Chenghu1, Zhang Qiuhui, Huang Mingming, Huang Quanzhen. Damage effects of impurity particles on film[J]. Infrared and Laser Engineering, 2016, 45(7): 721004
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