Temperature and Lateral Pressure Sensing Using a Sagnac Sensor Based on Cascaded Tilted Grating and Polarization-Maintaining Fibers

This study introduces a Sagnac Interferometer (SI) fiber sensor that integrates Polarization-Maintaining Fibers (PMFs) with a Tilted Fiber Bragg Grating (TFBG) for the dual-parameter measurement of strain and lateral pressure. By incorporating a 6° TFBG with PMFs into the SI sensor, its sensitivity...

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Bibliographic Details
Published inSensors (Basel, Switzerland) Vol. 24; no. 21; p. 6779
Main Authors Liu, Yifan, Li, Yujian, Xu, Pin, Yu, Changyuan
Format Journal Article
LanguageEnglish
Published Switzerland MDPI AG 22.10.2024
MDPI
Subjects
Equipment and supplies
Fiber optics
Lasers
lateral pressure
Light
PMF
Sagnac loop
Sensors
temperature
TFBG
TFBG
PMF
Sagnac loop
temperature
lateral pressure
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Summary:This study introduces a Sagnac Interferometer (SI) fiber sensor that integrates Polarization-Maintaining Fibers (PMFs) with a Tilted Fiber Bragg Grating (TFBG) for the dual-parameter measurement of strain and lateral pressure. By incorporating a 6° TFBG with PMFs into the SI sensor, its sensitivity is significantly enhanced, enabling advanced multi-parameter sensing capabilities. The sensor demonstrates a temperature sensitivity of −1.413 nm/°C and a lateral pressure sensitivity of −4.264 dB/kPa, as validated by repeated experiments. The results exhibit excellent repeatability and high precision, underscoring the sensor’s potential for robust and accurate multi-parameter sensing applications.
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ISSN:1424-8220
1424-8220
DOI:10.3390/s24216779