Femtosecond laser written fibre bragg gratings with arbitrary reflection and dispersion profiles

S. Antipov, M. Ams, R. Williams, A. Fuerbach, M. Withford

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contributionpeer-review

Abstract

We present results on the fabrication of low-loss Fibre Bragg Gratings (FBGs) that were directly inscribed into the fibre core using focused femtosecond laser pulses in a continuous core-scanning technique [1]. This method enables the fabrication of strong Type I-IR gratings with virtually arbitrary reflection and dispersion profiles. While the core-scanning technique offers the same flexibility over the grating period that is the distinctive feature of point-by-point inscribed gratings (which are typically Type II-IR damage-gratings), it also results in ultra-low scattering losses that can normally only be achieved in phase-mask written gratings. The types of structures that have been fabricated include uniform FBGs, chirped FBGs, apodised FBGs and phase-shifted gratings. All gratings were inscribed with circular polarized light in order to reduce losses associated with light scattering on nano-gratings or nano-crevices, respectively [2].
Original languageEnglish
Title of host publicationEuropean Conference on Lasers and Electro-Optics, CLEO 2015
PublisherOSA - The Optical Society
Number of pages1
ISBN (Print)9781467374750
Publication statusPublished - 2015
EventEuropean Conference on Lasers and Electro-Optics, CLEO 2015 - Munich, Germany
Duration: 21 Jun 201525 Jun 2015

Other

OtherEuropean Conference on Lasers and Electro-Optics, CLEO 2015
CountryGermany
CityMunich
Period21/06/1525/06/15

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