Low thermal sensitivity grating devices based on ex-45° tilting structure capable of forward-propagating cladding modes coupling


The authors describe a detailed investigation on tilted fiber Bragg grating (TFBG) structures with tilted angles exceeding 45°. In contrast to the backward mode coupling mechanism of Bragg gratings with normal and small tilting structures, the ex-45° TFBGs facilitate the light coupling to the forward-propagating cladding modes. The authors have also theoretically and experimentally examined the mode coupling transition of TFBGs with small, medium, and large tilt angles. In particular, experiments are conducted to investigate the spectra and far-field distribution, as well as temperature, strain, and refractive-index sensitivities of ex-45° devices. It has been revealed that these ex-45° gratings exhibit ultralow thermal sensitivity. As in-fiber devices, they may be superior to conventional Bragg and long-period gratings when the low thermal cross sensitivity is required. © 2006 IEEE.

Divisions: College of Engineering & Physical Sciences > Aston Institute of Photonics Technology (AIPT)
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Publication ISSN: 0733-8724
Last Modified: 29 Nov 2023 10:10
Date Deposited: 04 May 2011 11:14
Full Text Link: 10.1109/JLT.2006.884985
Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
http://ieeexplo ... rnumber=4063450 (Publisher URL)
PURE Output Type: Article
Published Date: 2006-12
Authors: Zhou, Kaiming
Zhang, Lin
Chen, Xianfeng F.
Bennion, Ian



Version: Accepted Version

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