Light power behaviour when bending plastic optical fibres

Arrué, J.; Zubía, Joseba; Fuster, G.; Kalymnios, D.

doi:10.1049/ip-opt:19982476

Cited by 59 publications

(35 citation statements)

References 4 publications

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“…The procedure for mode scrambling involves curving the POF inward and outward repeatedly, with the appropriate bend radii and lengths of the straight and bent sections for the type of POF considered [20][21][22][23][24]. We have seen that the purpose of approaching the equilibrium mode distribution in SI and GI POF can be achieved with various different setups, consisting of two or more cylinders around which the POF is bent.…”

Section: Active and Passive Optical Devices For Pofmentioning

confidence: 99%

“…In the case of the eight-shaped configuration, the appropriate radius of the cylinders can vary from 10 to 21 millimeters. For example, two complete turns with a radius of 10 millimeters and a separation between the centers of the mandrels of 30 millimeters can work for standard high-NA PMMA POF, a greater radii up to 21 we increase significantly the number of complete turns. The distance between the centers of the cylinders can be varied from 30 to 120 millimeters for fine-tuning, but it does not affect the performance if it is longer.…”

Section: Active and Passive Optical Devices For Pofmentioning

confidence: 99%

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Geometric Optics Analysis of Multi-Step Index Optical Fibers

Zubía

Aldabaldetreku

Durana

et al. 2004

Fiber and Integrated Optics

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Section: Active and Passive Optical Devices For Pofmentioning

confidence: 99%

Section: Active and Passive Optical Devices For Pofmentioning

confidence: 99%

Geometric Optics Analysis of Multi-Step Index Optical Fibers

Zubía

Aldabaldetreku

Durana

et al. 2004

Fiber and Integrated Optics

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“…Nevertheless, the latter solution suffers from the problem that the light launched into the prism tends to scatter and spread, even under conditions of TIR, thus very little light is returned to the detector and objective lenses need to be used. On the other hand, for increasing the sensitivity, bends [28] plus cladding removal and partially core polished [29] can be especially done on POF fibers. Other solutions take advantage of the fact of using silica-based tapered fibers, as in [30], reporting a fiberoptic refractometer.…”

Section: Introductionmentioning

confidence: 99%

Intensity-Based Optical Systems for Fluid Level Detection

Vázquez

Montero²

2012

EEENG

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Abstract:In this work different patented optical sensing solutions are reviewed, mostly for their application of measuring fluid level within tanks, containers or bio-mass boilers in condominiums, thus providing an intrinsically safe sensing sce-nario within harsh and hazardous environments, due to the passive nature of light. In general, the intensity modulation of the light is very attractive since it is simple in concept, reliable, and can produce optical sensors which offer a wide range of applications at lower costs, thus facilitating their final commercialization and market spread. The optical sensing solu-tions discussed in this work include a fiber-optic sensor for fluid detection/level with intrinsic self-referencing property thus solving one of the main drawbacks when using intensity-based sensors, namely the undesirable and unexpected opti-cal power fluctuations when operating. Moreover, a low-cost intensity-based POF sensor for fuel level measurements in paramotoring and powered paragliding is presented. It features a very simple and a very low-cost solution for these sports, attending the increasing demand of new and more sophisticated embedded sensors in the flight instrumental. Going on from this, a fiber-optic fluid level sensor for a range greater than 2m is described. The system uses a single lens and a sin-gle fiber but being possible to increase the measuring safety area by optical multiplexing. Finally, a fluid level sensor based on a Light Dependent Resistor (LDR), which includes a temperature control scheme, is presented. Its final embodi-ment design is also shown and described.

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“…Much research has focused on the computational simu− lation of fiber performance [4][5][6][7][8][9][10]. A number of methods of evaluating dispersion in optical fibers have been reported.…”

Section: Introductionmentioning

confidence: 99%

Investigation of influence of tilt angle on mode dispersion in step-index plastic optical fibers

Kovačević¹,

Djordjevich

2011

Opto-Electronics Review

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Effect of numerical aperture on mode dispersion and bandwidth is reported for commercially available step-index plastic optical fibers. For the first time, the functional relationship is given between dispersion and the “tilt-angle” describing the slant of the input/output face for a fiber terminated by a plane not perpendicular to the fiber axis. This tilt of a non-squarely terminated fiber may be intentional as in some biomedical spectroscopic sensors, or otherwise when exploiting the quick-interconnectivity potential of plastic fibers.

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Light power behaviour when bending plastic optical fibres

Cited by 59 publications

References 4 publications

Geometric Optics Analysis of Multi-Step Index Optical Fibers

Geometric Optics Analysis of Multi-Step Index Optical Fibers

Intensity-Based Optical Systems for Fluid Level Detection

Investigation of influence of tilt angle on mode dispersion in step-index plastic optical fibers

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