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Time-resolved optical diagnosis of intense femtosecond laser ablation of silica glass

Guo Wen-Gang Hu Hao-Feng Wang Xiao-Lei Zhai Hong-Chen Wang Pan

Time-resolved optical diagnosis of intense femtosecond laser ablation of silica glass

Guo Wen-Gang, Hu Hao-Feng, Wang Xiao-Lei, Zhai Hong-Chen, Wang Pan
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  • Received Date:  15 March 2010
  • Accepted Date:  23 March 2010
  • Published Online:  15 January 2011

Time-resolved optical diagnosis of intense femtosecond laser ablation of silica glass

  • 1. (1)Department of Basic Science, Institute of Military Traffic, Tianjin 300161, China; (2)Institute of Modern Optics, Nankai University, Key Laboratory of Optoelectronic Information Science & Technology,Ministry of Education, Tianjin 300071, China

Abstract: The dynamic process of femtosecond laser pulse ablation of silica glass has been experimentally investigated by ultrafast time-resolved optical diagnosis. The digital holograms of material ejections outside the silica glass are recorded, and two-dimensional phase difference maps at different delay times are obtained, from which the composition and the structure of the ejected materials are deduced. Besides, the time-resolved shadowgraphs of the phenomena inside the silica glass are also recorded, and the evolution process of two stress waves inside the silica glass is observed in the shadowgraphs, which are believed to be related to two material ejections outside the target.

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