Spectral modification of type IA fibre Bragg gratings by high power near infra-red lasers


We report the first experimental measurements on the spectral modification of Type IA fibre Bragg gratings, incorporated in an optical network, which result from the use of high-power, near infrared lasers. The fibre grating properties are modified in a controlled manner by exploiting the characteristics of the inherent 1400nm absorption band of the optical fibre, which grows in strength during the Type IA grating inscription. If the fibre network is illuminated with a high power laser, having an emission wavelength coincident with the absorption band, the Type IA centre wavelength and chirp can be modified. Furthermore, partial grating erasure is demonstrated. This has serious implications when using Type IA gratings in an optical network, as their spectrum can be modified using purely optical methods (no external heating source acts on the fibre), and to their long-term stability as the grating is shown to decay. Conversely, suitably stabilised gratings can be spectrally tailored, for tuning fibre lasers or edge filter modification in sensing applications, by purely optical means.

Publication DOI: https://doi.org/10.1117/12.662315
Divisions: College of Engineering & Physical Sciences > Aston Institute of Photonics Technology (AIPT)
Additional Information: Copyright 2006 SPIE. One print or electronic copy may be made for personal use only. Systematic reproduction, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.
Uncontrolled Keywords: Fibre Bragg gratings,Optical fibre sensors,Photosensitivity,Type IA grating,Wavelength tuning,Electrical and Electronic Engineering,Condensed Matter Physics
Publication ISSN: 1996-756X
Last Modified: 27 Jun 2024 09:50
Date Deposited: 21 Feb 2019 15:11
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Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
https://www.spi ... /12.662315.full (Publisher URL)
PURE Output Type: Conference article
Published Date: 2006-08-09
Authors: Kalli, Kyriacos
Simpson, A. George
Zhou, Kaimin (ORCID Profile 0000-0002-6011-1912)
Zhang, Lin (ORCID Profile 0000-0002-1691-5577)
Birkin, David
Ellingham, Tim
Bennion, Ian



Version: Published Version

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