Application of adaptive optics to laser micromachining

Jonathan Parry, Rainer J Beck, Nick Weston, Jonathan Shephard, Duncan Hand

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

2 Citations (Scopus)

Abstract

For many laser machining applications it is common to use some form of beam shaping to modify the typically Gaussian intensity distribution of the laser to generate an intensity profile that is more appropriate for the task. For example refractive elements may be used to generate top hat intensity distributions which are better suited to drilling applications or more complex profiles may be generated to mark patterns on a surface either with diffractive elements or masks. Dynamic beam shaping elements offer an advantage in terms of changing between shapes rapidly to quickly mark a series of shapes across a surface or even to modify the beam shape during a machining operation. Machining demonstrations are presented with two types of adaptive optics (AO's) using millisecond and nanosecond pulsed lasers. The first AO is a piezoelectric deformable mirror capable of supporting high average powers and enabling rapid (~1 kHz) modification of the mode shape of a beam. The second is a liquid crystal spatial light modulator which, although slower in response (75 Hz), can generate complex arbitrary shapes. The dynamic nature of these elements is used to improve the quality of laser machining results.

Original languageEnglish
Title of host publication29th International Congress on Applications of Lasers and Electro-Optics, ICALEO 2010 - Congress Proceedings
Pages767-776
Number of pages10
Volume103
Publication statusPublished - 2010
Event29th International Congress on Applications of Lasers and Electro-Optics - Anaheim, CA, United States
Duration: 26 Sep 201030 Sep 2010

Conference

Conference29th International Congress on Applications of Lasers and Electro-Optics
Abbreviated titleICALEO 2010
CountryUnited States
CityAnaheim, CA
Period26/09/1030/09/10

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    Parry, J., Beck, R. J., Weston, N., Shephard, J., & Hand, D. (2010). Application of adaptive optics to laser micromachining. In 29th International Congress on Applications of Lasers and Electro-Optics, ICALEO 2010 - Congress Proceedings (Vol. 103, pp. 767-776)