Journal
IEEE PHOTONICS TECHNOLOGY LETTERS
Volume 22, Issue 15, Pages 1120-1122Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LPT.2010.2050474
Keywords
Interferometers; optical fiber sensors; photonic crystal fibers
Funding
- COST 299-Optical Fibers for New Challenges Facing the Information Society
- Fundacao para a Ciencia e Tecnologia
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In this work, a fiber loop mirror for the simultaneous measurement of strain and temperature is presented. The loop mirror contains a section of a small core microstructured fiber characterized for strain and temperature sensing. Due to the small core geometry and using a small section length, the structure presents high birefringence and also intermodal interference. The spectral response of this configuration shows the presence of three interferometers. One of them corresponds to the interference of light that propagates in the fast and slow axes (group birefringence) and the others are associated with the interference of light in the two lowest order spatial modes in each of the fiber eigenaxis. These interferometers present distinct sensitivities to strain and temperature for different wavelengths.
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