The impact of graphite coating and wavelength on picosecond laser machining of optical glasses

Krystian L. Wlodarczyk, Frank Albri, Robert R J Maier, Nick J. Weston, Duncan P. Hand

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

This paper presents the impact of a graphite coating and wavelength on picosecond laser processing of fused silica (HPFS®7980 Corning) and Borofloat®33 glass (Schott AG). Within this work, the surface damage threshold, single-pulse ablation depth, and multi-pulse removal rate of 'as-manufactured' glasses have been determined for three different wavelengths: 343, 515 and 1030 nm, and compared with the results obtained for the same glasses when coated with a thin layer of graphite prior to laser treatment. The experimental results show that the surface damage threshold of graphite-coated glasses is significantly lower (up to 35 times) than that of 'as-manufactured' glasses, whereas the single-pulse ablation depth is the highest at the laser wavelength of 343 nm. Moreover, it has been found that fused silica and Borofloat®33 glass can be machined with better control of the ablation depth when its surface is coated with graphite. This is attributed to the increased absorption of the workpiece at wavelengths at which this material is normally transparent.

Original languageEnglish
Title of host publicationICALEO 2012 - 31st International Congress on Applications of Lasers and Electro-Optics
Pages768-774
Number of pages7
Publication statusPublished - 1 Dec 2012
Event31st International Congress on Applications of Lasers and Electro-Optics 2012 - Anaheim Marriott Hotel, Anaheim, CA, United States
Duration: 23 Sep 201227 Sep 2012

Conference

Conference31st International Congress on Applications of Lasers and Electro-Optics 2012
Abbreviated titleICALEO 2012
CountryUnited States
CityAnaheim, CA
Period23/09/1227/09/12

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials

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  • Cite this

    Wlodarczyk, K. L., Albri, F., Maier, R. R. J., Weston, N. J., & Hand, D. P. (2012). The impact of graphite coating and wavelength on picosecond laser machining of optical glasses. In ICALEO 2012 - 31st International Congress on Applications of Lasers and Electro-Optics (pp. 768-774)