Twin-Core Fiber-Based Mach Zehnder Interferometer for Simultaneous Measurement of Strain and Temperature
In this paper we present an all-fiber interferometric sensor for the simultaneous measurement of strain and temperature. It is composed of a specially fabricated twin-core fiber spliced between two pieces of a single-mode fiber. Due to the refractive index difference between the two cores in a twin-...
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doaj-fd53c5000fe64ddb90a7a5855c3e75d52020-11-24T22:13:25ZengMDPI AGSensors1424-82202018-03-0118391510.3390/s18030915s18030915Twin-Core Fiber-Based Mach Zehnder Interferometer for Simultaneous Measurement of Strain and TemperatureDominik Kowal0Waclaw Urbanczyk1Pawel Mergo2Department of Optics and Photonics, Faculty of Fundamental Problems of Technology, Wroclaw University of Science and Technology, 50-370 Wroclaw, PolandDepartment of Optics and Photonics, Faculty of Fundamental Problems of Technology, Wroclaw University of Science and Technology, 50-370 Wroclaw, PolandLaboratory of Optical Fiber Technology, Maria Curie-Sklodowska University, 20-031 Lublin, PolandIn this paper we present an all-fiber interferometric sensor for the simultaneous measurement of strain and temperature. It is composed of a specially fabricated twin-core fiber spliced between two pieces of a single-mode fiber. Due to the refractive index difference between the two cores in a twin-core fiber, a differential interference pattern is produced at the sensor output. The phase response of the interferometer to strain and temperature is measured in the 850–1250 nm spectral range, showing zero sensitivity to strain at 1000 nm. Due to the significant difference in sensitivities to both parameters, our interferometer is suitable for two-parameter sensing. The simultaneous response of the interferometer to strain and temperature was studied using the two-wavelength interrogation method and a novel approach based on the spectral fitting of the differential phase response. As the latter technique uses all the gathered spectral information, it is more reliable and yields the results with better accuracy.http://www.mdpi.com/1424-8220/18/3/915fiber-optic sensorstwin-core fiberssimultaneous measurement of strain and temperature |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Dominik Kowal Waclaw Urbanczyk Pawel Mergo |
spellingShingle |
Dominik Kowal Waclaw Urbanczyk Pawel Mergo Twin-Core Fiber-Based Mach Zehnder Interferometer for Simultaneous Measurement of Strain and Temperature Sensors fiber-optic sensors twin-core fibers simultaneous measurement of strain and temperature |
author_facet |
Dominik Kowal Waclaw Urbanczyk Pawel Mergo |
author_sort |
Dominik Kowal |
title |
Twin-Core Fiber-Based Mach Zehnder Interferometer for Simultaneous Measurement of Strain and Temperature |
title_short |
Twin-Core Fiber-Based Mach Zehnder Interferometer for Simultaneous Measurement of Strain and Temperature |
title_full |
Twin-Core Fiber-Based Mach Zehnder Interferometer for Simultaneous Measurement of Strain and Temperature |
title_fullStr |
Twin-Core Fiber-Based Mach Zehnder Interferometer for Simultaneous Measurement of Strain and Temperature |
title_full_unstemmed |
Twin-Core Fiber-Based Mach Zehnder Interferometer for Simultaneous Measurement of Strain and Temperature |
title_sort |
twin-core fiber-based mach zehnder interferometer for simultaneous measurement of strain and temperature |
publisher |
MDPI AG |
series |
Sensors |
issn |
1424-8220 |
publishDate |
2018-03-01 |
description |
In this paper we present an all-fiber interferometric sensor for the simultaneous measurement of strain and temperature. It is composed of a specially fabricated twin-core fiber spliced between two pieces of a single-mode fiber. Due to the refractive index difference between the two cores in a twin-core fiber, a differential interference pattern is produced at the sensor output. The phase response of the interferometer to strain and temperature is measured in the 850–1250 nm spectral range, showing zero sensitivity to strain at 1000 nm. Due to the significant difference in sensitivities to both parameters, our interferometer is suitable for two-parameter sensing. The simultaneous response of the interferometer to strain and temperature was studied using the two-wavelength interrogation method and a novel approach based on the spectral fitting of the differential phase response. As the latter technique uses all the gathered spectral information, it is more reliable and yields the results with better accuracy. |
topic |
fiber-optic sensors twin-core fibers simultaneous measurement of strain and temperature |
url |
http://www.mdpi.com/1424-8220/18/3/915 |
work_keys_str_mv |
AT dominikkowal twincorefiberbasedmachzehnderinterferometerforsimultaneousmeasurementofstrainandtemperature AT waclawurbanczyk twincorefiberbasedmachzehnderinterferometerforsimultaneousmeasurementofstrainandtemperature AT pawelmergo twincorefiberbasedmachzehnderinterferometerforsimultaneousmeasurementofstrainandtemperature |
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1725801116918087680 |