Design and performance of a plastic optical fiber leakage sensor

In this article design and operation of a plastic optical fiber (POF) sensor based on the unconventional light leakage from one fiber to another one causing intensity modulation are presented. The dominant loss mechanism was found to be the evanescent loss and based on this phenomenon the optical fi...

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Vydané v:Optics and laser technology Ročník 39; číslo 7; s. 1346 - 1350
Hlavní autori: Golnabi, H., Azimi, P.
Médium: Journal Article
Jazyk:English
Vydavateľské údaje: Oxford Elsevier Ltd 01.10.2007
Elsevier Science
Predmet:
Applied sciences
Circuit properties
Electric, optical and optoelectronic circuits
Electronics
Exact sciences and technology
General equipment and techniques
Instruments, apparatus, components and techniques common to several branches of physics and astronomy
Integrated optics. Optical fibers and wave guides
Intensity modulation
Optical and optoelectronic circuits
Optical sensor
Physics
Plastic fiber
Sensors (chemical, optical, electrical, movement, gas, etc.); remote sensing
Intensity modulation
Plastic fiber
Optical sensor
Optical fibers
Refractive index
Measuring methods
Experimental study
Fiber optic sensors
Penetration depth
Reproducibility
Optical sensors
Plastics
Evanescent wave
ISSN:0030-3992, 1879-2545
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Popis
Shrnutí:In this article design and operation of a plastic optical fiber (POF) sensor based on the unconventional light leakage from one fiber to another one causing intensity modulation are presented. The dominant loss mechanism was found to be the evanescent loss and based on this phenomenon the optical fiber sensor was designed. The penetration depth of evanescent wave as a function of different refractive index of cladding was calculated. Operation of this sensor was tested as a liquid level sensor for different liquids and the experimental results are compared. The dry (air interface layer) and wet output (liquid interface layer) signals for this probe were measured for a series of measurements and important factors concerning sensor operation are described. The precision of measured values, reproducibility of the results (1.35% error), and the stability of sensing operation as a function of time at different launching powers are also reported (0.85% error). The reported results for this design are promising and verify the successful operation of such a device as a liquid level probe and also as an on/off level switch.
Bibliografia:ObjectType-Article-2
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content type line 23
ISSN:0030-3992
1879-2545
DOI:10.1016/j.optlastec.2006.11.003