Embedded progressive-three-layered fiber long-period gratings for respiratory monitoring

Thomas D.P. Allsop*, T. Earthrowl-Gould, David J. Webb, Ian Bennion

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


A long-period grating (LPG) was written into a progressive three-layered single-mode fiber that was embedded into a flexible platform as a curvature sensor. The spectral location and profile of the LPGs were unaltered after implantation in the platform. The curvature sensitivity was 3.747 nm m with a resolution of ± 1.1 × 10-2 m-1. The bend sensor is intended to be part of a respiratory monitoring system and was tested on a resuscitation training manikin. © 2003 society of Photo-Optical Instrumentation Engineers.

Original languageEnglish
Pages (from-to)552-558
Number of pages7
JournalJournal of Biomedical Optics
Issue number3
Publication statusPublished - Jul 2003

Bibliographical note

Allsop, Thomas D.P., Earthrowl-Gould, T., Webb, David J. and Bennion, Ian, Embedded progressive-three-layered fiber long-period gratings for respiratory monitoring. Journal of biomedical optics, 8 (3), pp. 552-558, (2003). Copyright 2003 Society of Photo-Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.


  • curvature sensing
  • long-period gratings
  • respiratory monitoring


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