High aspect ratio taper-free microchannel fabrication using femtosecond Bessel beams

M. K. Bhuyan, F. Courvoisier, P. A. Lacourt, M. Jacquot, L. Furfaro, M. J. Withford, J. M. Dudley

Research output: Contribution to journalArticle

115 Citations (Scopus)

Abstract

We present a systematic study of femtosecond laser microchannel machining in glass using nondiffracting Bessel beams. In particular, our results identify a source and focusing parameter working window where high aspect ratio taper-free microchannels can be reproducibly produced without sample translation. With appropriate source parameters, we machine channels of 2 μm diameter and with aspect ratios up to 40. We propose the filamentation stability of the Bessel beam propagation as the critical factor underlying the controlled and reproducible results that have been obtained.

Original languageEnglish
Pages (from-to)566-574
Number of pages9
JournalOptics Express
Volume18
Issue number2
DOIs
Publication statusPublished - 18 Jan 2010

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