Femtosecond laser direct-writing of waveguide Bragg gratings in a quasi cumulative heating regime

Christopher Miese*, Michael J. Withford, Alexander Fuerbach

*Corresponding author for this work

Research output: Contribution to journalArticle

14 Citations (Scopus)
16 Downloads (Pure)


Waveguide Bragg gratings (WBGs) were directly inscribed into Alkaline Earth Boro-Aluminosilicate glass samples in a single process step at high fabrication speeds. We utilized a 5.1 MHz femtosecond oscillator to exploit high repetition rate heat accumulation effects. The pulse energy was modulated using a Pockels cell in order to fabricate waveguides that contain a periodic array of nano-structures inside their core. We have demonstrated, for the first time, that the transient build-up of heat accumulation within the sample can lead to the formation of a permanent nano-void. This effect can be exploited to fabricate WBGs at high speeds.

Original languageEnglish
Pages (from-to)19542-19550
Number of pages9
JournalOptics Express
Issue number20
Publication statusPublished - 26 Sep 2011

Bibliographical note

This paper was published in Optics Express and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://www.opticsinfobase.org/abstract.cfm?URI=oe-19-20-19542. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.

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