Open AccessHigh sensitivity Sagnac interferometric strain sensor based polarization maintaining fibre enhanced coupling
Author(s) -
Ruan Juan
Publication year - 2021
Publication title -
iet optoelectronics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.379
H-Index - 42
eISSN - 1751-8776
pISSN - 1751-8768
DOI - 10.1049/ote2.12010
Subject(s) - fusion splicing , interferometry , materials science , fabrication , optics , sensitivity (control systems) , polarization (electrochemistry) , optical fiber , fibre optic gyroscope , fiber optic sensor , optoelectronics , fusion , physics , electronic engineering , chemistry , medicine , linguistics , alternative medicine , philosophy , pathology , engineering
A high sensitivity, simple fabrication all‐fibre strain sensor is proposed and demonstrated experimentally. The sensor consists of a section of Panda‐type polarization maintaining fibre (PMF) built into a Sagnac interferometer. The Panda‐type PMF is intentionally spliced to the single‐mode fibre through enhanced fusion splicing to excite high‐order polarized modes. The enhanced fusion splicing characterizes a large magnitude of overlap. The measured strain sensitivity reaches up to 32 pm/με and the strain resolution of 0.63 με has been achieved. The proposed fibre strain sensor characterizing easy fabrication and high sensitivity can be a good candidate in the field of structural health monitoring.