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Nanoscale morphology and thermal properties of low insertion loss fiber Bragg gratings produced using the phase mask technique and a single femtosecond laser pulse

From National Research Council Canada

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DOIResolve DOI: https://doi.org/10.1364/OE.476872
AuthorSearch for: 1; Search for: 1; Search for: ORCID identifier: https://orcid.org/0000-0001-8051-3532; Search for: 1; Search for: 1; Search for: 1ORCID identifier: https://orcid.org/0000-0002-6144-0937
Affiliation
  1. National Research Council of Canada
FormatText, research-article
Abstract
Fiber Bragg gratings with a very low insertion loss are inscribed using the phase mask technique and a single infrared (800 nm) femtosecond laser pulse. The morphology of the resultant light-induced structural changes in the Ge-doped silica fiber (SMF-28) is analyzed using scanning electron microscopy. The electron microscopy images reveal that each Bragg grating period incorporates an elongated micropore embedded in a region of homogeneous material modification. The Bragg wavelength drift and reflectivity of fiber Bragg gratings produced with single pulses having the same energy but different duration (80 fs and 350 fs) are monitored for 1000 hours in the course of isothermal annealing at 1000°C. The annealing data demonstrate that both the isothermal Bragg wavelength drift and the decrease in the reflectivity of the fiber Bragg gratings under test are statistically slower for the 350 fs inscription pulses.
Publication date
PublisherOptica Publishing Group
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  • Optics Express 30, no. 26 (19 December 2022): 47361–.
LanguageEnglish
Peer reviewedYes
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Record identifier217518f4-7aba-43f7-88cf-5ee131e7a198
Record created2024-02-27
Record modified2024-02-27
Date modified: