<  Back to the Polytechnique Montréal portal

Femtosecond laser direct-writing of high quality first-order Bragg gratings with arbitrary complex apodization by phase modulation

Anthony Roberge, Sébastien Loranger, Jean-Sébastien Boisvert, Frédéric Monet and Raman Kashyap

Article (2022)

Open Acess document in PolyPublie and at official publisher
[img]
Preview
Open Access to the full text of this document
Published Version
Terms of Use: Optica Open Access Publishing Agreement
Download (4MB)
Show abstract
Hide abstract

Abstract

Femtosecond laser direct-writing is an attractive technique to fabricate fiber Bragg gratings and to achieve through-the-coating inscription. In this article, we report the direct inscription of high-quality first-order gratings in optical fiber, without the use of an index-matching medium. A new alignment technique based on the inscription of weak probe gratings is used to track the relative position between the focal spot and fiber core. A simple and flexible method to precisely control the position of each grating plane is also presented. With this method, periodic phase modulation of grating structures is achieved and used to inscribe arbitrary apodization and phase profiles. It is shown that a burst of multiple laser pulses used to inscribe each grating plane leads to a significant increase in the grating strength, while maintaining low insertion loss, critical for many applications.

Department: Department of Electrical Engineering
Department of Engineering Physics
Funders: Natural Sciences and Engineering Research Council of Canada, Fonds de recherche du Québec – Nature et technologies
PolyPublie URL: https://publications.polymtl.ca/54317/
Journal Title: Optics Express (vol. 30, no. 17)
Publisher: Optica Publishing Group
DOI: 10.1364/oe.465331
Official URL: https://doi.org/10.1364/oe.465331
Date Deposited: 02 Nov 2023 14:27
Last Modified: 07 Nov 2023 13:55
Cite in APA 7: Roberge, A., Loranger, S., Boisvert, J.-S., Monet, F., & Kashyap, R. (2022). Femtosecond laser direct-writing of high quality first-order Bragg gratings with arbitrary complex apodization by phase modulation. Optics Express, 30(17), 30405-30419. https://doi.org/10.1364/oe.465331

Statistics

Total downloads

Downloads per month in the last year

Origin of downloads

Dimensions

Repository Staff Only

View Item View Item