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

Kaiming Zhou*, Lin Zhang, Xianfeng F. Chen, Ian Bennion

*Corresponding author for this work

Research output: Contribution to journalArticle

Abstract

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.

Original languageEnglish
Pages (from-to)5087-5094
Number of pages8
JournalJournal of Lightwave Technology
Volume24
Issue number12
DOIs
Publication statusPublished - Dec 2006

Bibliographical note

© 2006 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.

Keywords

  • coupled mode analysis optical biosensors
  • fiber Bragg gratings (FBGs)
  • optical fiber radiation effects
  • optical gratings

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