Highly sensitive temperature and strain sensors based on all-fiber 45°-TFG Lyot filter

Zhijun Yan*, Adebayo Adedotun, Kaiming Zhou, Lin Zhang

*Corresponding author for this work

Research output: Chapter in Book/Published conference outputConference publication


We demonstrate highly sensitive temperature and strain sensors based on an all-fiber Lyot filter structure, which is formed by concatenating two 45°-TFGs (tilted fiber gratings) with a PM fiber cavity. The experiment results show the all-fiber 45°-TFG Lyot filter has very high sensitivity to strain and temperature. The 45°-TFG Lyot filters of two different cavity lengths (18cm and 40 cm) have been evaluated for temperature sensing by heating a section of the cavity from 10°C to 50°C. The experiment results have shown remarkably high temperature sensitivities of 0.616nm/°C for 18cm and 0.31nm/°C for 40cm long cavity filter, respectively. The 18cm long cavity filter has been subjected to strain variations up to around 550μ ε and the filter has exhibited strain sensitivities of 0.02499nm/μ ε and 0.012nm/μ ε for two straining situations, where its cavity middle section of 18cm and 9cm were stretched, respectively.

Original languageEnglish
Title of host publicationOptical sensing and detection II
EditorsFrancis Berghmans, Anna G. Mignani, Piet de Moor
Number of pages8
ISBN (Print)978-0-8194-9131-2
Publication statusPublished - 16 Apr 2012
EventOptical sensing and detection II - Brussels, Belgium
Duration: 16 Apr 201219 Apr 2012

Publication series

NameSPIE proceedings
ISSN (Print)0277-786X


ConferenceOptical sensing and detection II

Bibliographical note

Zhijun Yan ; Adebayo Adedotun ; Kaiming Zhou and Lin Zhang, "Highly sensitive temperature and strain sensors based on all-fiber 45°-TFG Lyot filter", Proc. SPIE 8439, Optical Sensing and Detection II, 843905 (April 23, 2012).

Copyright 2012 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.

DOI: http://dx.doi.org/10.1117/12.921461


  • Lyot filter
  • sensor
  • strain
  • temperature
  • TFG


Dive into the research topics of 'Highly sensitive temperature and strain sensors based on all-fiber 45°-TFG Lyot filter'. Together they form a unique fingerprint.

Cite this