Femtosecond direct-writing of low-loss fiber Bragg gratings using a continuous core-scanning technique

Robert J. Williams*, Ria G. Krämer, Stefan Nolte, Michael J. Withford

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

68 Citations (Scopus)
37 Downloads (Pure)


We report the inscription of low-loss fiber Bragg gratings using focused femtosecond (fs) pulses and a continuous core-scanning technique. This direct-write technique produces high-fidelity Type I-IR gratings that share the inherent advantages of other direct-write methods, such as the point-by-point (PbP) method, for which the grating period is a free parameter. However, here we demonstrate an order of magnitude improvement in scattering loss compared to PbP gratings, to a level comparable with that of phase-mask-based fs inscription. A first-order grating was inscribed in standard telecommunications fiber with -49 dB transmission at the Bragg wavelength and 0.1 dB broadband scattering loss. Potential application of these gratings to large-mode-area fibers and chirped grating fabrication are highlighted.

Original languageEnglish
Pages (from-to)1918-1920
Number of pages3
JournalOptics Letters
Issue number11
Publication statusPublished - 1 Jun 2013

Bibliographical note

This paper was published in Optics Letters 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/ol/abstract.cfm?uri=ol-38-11-1918. 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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