Radiation from circular bends in multimode and single-mode optical fibres

Badar, A.H.; Maclean, T.S.M.; Gazey, B.K.; Miller, J. F. A. P.; Ghafoori-Shiraz, H.

doi:10.1049/ip-j.1989.0026

Cited by 11 publications

(9 citation statements)

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“…The power exchange depends on the interaction length and coupling strength along with other parameters. When two guides are parallel to each other, coupling coefficient is constant and the power launched into one guide will alternate back and forth between the two guides as long as they are close [22].…”

Section: New Approach Of Using Lapping Techniquementioning

confidence: 99%

Fabrication of Polymer Optical Fiber Splitter Using Lapping Technique

Supian¹,

Ab-Rahman²,

Arsad³

et al. 2018

Selected Topics on Optical Fiber Technologies and Applications

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This work involves in designing and developing a POF-based directional coupler/splitter using lapping technique and geometrical blocks. Two fiber strands were first tapered at the middle and they were attached to the geometrical blocks and lapped together. Design parameters that are used to develop this coupler/splitter are core diameter, D c , etching length, L e , bending radius, R c , coupling length, L c and pressure, F c . All the parameters were taken into account during characterization and analysis of the designed coupler in order to find the most optimum prototype coupler/splitter. Characterizations are done by experimental set-up to test the efficiency, splitting ratio, coupling ratio, excess loss and insertion loss for all the couplers/splitters. Through the characterization process and analysis, the optimized coupler with high splitting ratio and low excess loss were identified. Throughout the experimental process, some of the fibers were improved and renewed in order to realize the design and development of the coupler using this technique. The device can also be utilized as an optical tap and the applications of the device are not only limited in in-house network but also in automotive applications. By using a platform, several splitting ratio can be obtained by integrating different core-cladding thickness and bending radius in order to get the desired splitting ratio and excess loss.

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Section: New Approach Of Using Lapping Techniquementioning

confidence: 99%

Fabrication of Polymer Optical Fiber Splitter Using Lapping Technique

Supian¹,

Ab-Rahman²,

Arsad³

et al. 2018

Selected Topics on Optical Fiber Technologies and Applications

View full text Add to dashboard Cite

show abstract

“…The proportion of the power in the fiber which is radiated out depends on the radius curvature or bending radius and the difference between the refractive indices of core and cladding. Radiation not only happens in single mode fiber (SMF) or slab waveguides only but same event happens with MMF [2]. Optical power losses due to bending are is important in communication system due to the diminishing of link optical margin.…”

Section: Introductionmentioning

confidence: 99%

Study of Macro-Bending of Polymer Fiber in Multimode Pof Couplers Development by Lapping Technique

Supian¹,

Ab-Rahman²

2014

IJNCAA

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An experimental study of coupling efficiency of a circular multimode fiber coupler dependency of radiation from macro-bending is investigated. The study is done by experimental set-up using various radii of circular blocks customized with matching refractive index material. The aim is to provide a considerable explanation on the differences in splitting ratio, excess loss and insertion loss when different bending radii due to radii of circular blocks is applied to the couplers. Other factors that contribute to the characterization of the coupler include fiber diameters and forces exerted upon the two fibers that lapped together forming the coupler developed. The technique used is proven to develop a low-cost coupler using mechanical lapping technique.

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“…Theoretical approaches used to get deeper insight into the problem utilize various approximations, such as conformal transformation of the bend onto a straight inhomogeneous waveguide 1-3 , investigation of 2D bent slab [4][5][6] and application of ray tracing analysis [7][8][9][10][11][12] . In frame of the latter approach, generalized Fresnel formulae 9 have been derived taking in account the EM tunneling effect occurring in bent optical fibers.…”

Section: Introductionmentioning

confidence: 99%

Monte Carlo simulation of surface plasmon polariton excitation on U-bent multimode optical fibers

Klepáček

Kalvoda

2012

Optical Sensing and Detection II

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Sharply bent optical fibers can be used as sensory systems. At first instance, application of curved optical fiber is refractometric, but after immobilizing a metal layer on the stripped core of the optical fiber its usage can be much more sophisticated. On the metal layer surface, it is possible to excite a special electronic oscillatory mode, surface plasmon polariton (SPP). In the paper we present combination of the classic Drude model of free electron gas, the optical ray tracing approximation and the Monte Carlo method to calculate the probability and estimate the real possibility of excitation of SPP in a metal layer coating prepared on core of a U-bent multimode optical fiber. The calculated results allow for direct assessment of the optimized metal layer position on the semi-toroidal optical fiber waveguide in dependence on the model parameters.

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Radiation from circular bends in multimode and single-mode optical fibres

Cited by 11 publications

References 0 publications

Fabrication of Polymer Optical Fiber Splitter Using Lapping Technique

Fabrication of Polymer Optical Fiber Splitter Using Lapping Technique

Study of Macro-Bending of Polymer Fiber in Multimode Pof Couplers Development by Lapping Technique

Monte Carlo simulation of surface plasmon polariton excitation on U-bent multimode optical fibers

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