Distributed Humidity Sensing in PMMA Optical Fibers at 500 nm and 650 nm Wavelengths
Distributed measurement of humidity is a sought-after capability for various fields of application, especially in the civil engineering and structural health monitoring sectors. This article presents a method for distributed humidity sensing along polymethyl methacrylate (PMMA) polymer optical fiber...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2017-03-01
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| Series: | Sensors |
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| Online Access: | http://www.mdpi.com/1424-8220/17/4/738 |
| _version_ | 1818039681710817280 |
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| author | Sascha Liehr Mathias Breithaupt Katerina Krebber |
| author_facet | Sascha Liehr Mathias Breithaupt Katerina Krebber |
| author_sort | Sascha Liehr |
| collection | DOAJ |
| description | Distributed measurement of humidity is a sought-after capability for various fields of application, especially in the civil engineering and structural health monitoring sectors. This article presents a method for distributed humidity sensing along polymethyl methacrylate (PMMA) polymer optical fibers (POFs) by analyzing wavelength-dependent Rayleigh backscattering and attenuation characteristics at 500 nm and 650 nm wavelengths. Spatially resolved humidity sensing is obtained from backscatter traces of a dual-wavelength optical time domain reflectometer (OTDR). Backscatter dependence, attenuation dependence as well as the fiber length change are characterized as functions of relative humidity. Cross-sensitivity effects are discussed and quantified. The evaluation of the humidity-dependent backscatter effects at the two wavelength measurements allows for distributed and unambiguous measurement of relative humidity. The technique can be readily employed with low-cost standard polymer optical fibers and commercial OTDR devices. |
| first_indexed | 2024-12-10T08:02:30Z |
| format | Article |
| id | doaj.art-ea4826a6072f476cb54db5ca5528e8cf |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-12-10T08:02:30Z |
| publishDate | 2017-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-ea4826a6072f476cb54db5ca5528e8cf2022-12-22T01:56:45ZengMDPI AGSensors1424-82202017-03-0117473810.3390/s17040738s17040738Distributed Humidity Sensing in PMMA Optical Fibers at 500 nm and 650 nm WavelengthsSascha Liehr0Mathias Breithaupt1Katerina Krebber2Bundesanstalt für Materialforschung und–prüfung (BAM), Unter den Eichen 87, 12205 Berlin, GermanyBundesanstalt für Materialforschung und–prüfung (BAM), Unter den Eichen 87, 12205 Berlin, GermanyBundesanstalt für Materialforschung und–prüfung (BAM), Unter den Eichen 87, 12205 Berlin, GermanyDistributed measurement of humidity is a sought-after capability for various fields of application, especially in the civil engineering and structural health monitoring sectors. This article presents a method for distributed humidity sensing along polymethyl methacrylate (PMMA) polymer optical fibers (POFs) by analyzing wavelength-dependent Rayleigh backscattering and attenuation characteristics at 500 nm and 650 nm wavelengths. Spatially resolved humidity sensing is obtained from backscatter traces of a dual-wavelength optical time domain reflectometer (OTDR). Backscatter dependence, attenuation dependence as well as the fiber length change are characterized as functions of relative humidity. Cross-sensitivity effects are discussed and quantified. The evaluation of the humidity-dependent backscatter effects at the two wavelength measurements allows for distributed and unambiguous measurement of relative humidity. The technique can be readily employed with low-cost standard polymer optical fibers and commercial OTDR devices.http://www.mdpi.com/1424-8220/17/4/738optical fiber sensorhumidity sensordistributed sensorOTDRpolymer optical fiberbackscatter measurementRayleigh scatteringPMMAspectral measurement |
| spellingShingle | Sascha Liehr Mathias Breithaupt Katerina Krebber Distributed Humidity Sensing in PMMA Optical Fibers at 500 nm and 650 nm Wavelengths Sensors optical fiber sensor humidity sensor distributed sensor OTDR polymer optical fiber backscatter measurement Rayleigh scattering PMMA spectral measurement |
| title | Distributed Humidity Sensing in PMMA Optical Fibers at 500 nm and 650 nm Wavelengths |
| title_full | Distributed Humidity Sensing in PMMA Optical Fibers at 500 nm and 650 nm Wavelengths |
| title_fullStr | Distributed Humidity Sensing in PMMA Optical Fibers at 500 nm and 650 nm Wavelengths |
| title_full_unstemmed | Distributed Humidity Sensing in PMMA Optical Fibers at 500 nm and 650 nm Wavelengths |
| title_short | Distributed Humidity Sensing in PMMA Optical Fibers at 500 nm and 650 nm Wavelengths |
| title_sort | distributed humidity sensing in pmma optical fibers at 500 nm and 650 nm wavelengths |
| topic | optical fiber sensor humidity sensor distributed sensor OTDR polymer optical fiber backscatter measurement Rayleigh scattering PMMA spectral measurement |
| url | http://www.mdpi.com/1424-8220/17/4/738 |
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