Analysis of the propagation characteristics of circular step-index fibre with new sheath helix boundary condition

Pillay, Shamini; Kumar, Deepak; Phua, Yeong‐Nan; Azhar, Hairul

doi:10.1080/09205071.2013.870499

Cited by 1 publication

(6 citation statements)

References 6 publications

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“…In the reverse boundary condition there is no band gap for both pitch angles. Our Previous work done on reverse boundary condition showed band gap for the pitch angles 10°,20°,30° [10]. Since similar parameters were used in the previous and current work with exception of the pitch angles, thus it may be concluded that the pitch angle is one of the factors contributing to the band gaps.…”

Section: For 90  supporting

confidence: 58%

“…A comparative study was carried out for the circular waveguide with helical windings between the core and cladding parameters. This work is an extension and refinement to our previous work [10] [16] which considered only a few pitch angles namely 10°,20°,30°. The dispersion curves for those angles showed limited amount of mode behaviour.…”

Section: Discussionmentioning

confidence: 92%

“…A representative numerical computation is able to illustrate the use of the Eigen equations that were derived in our previous works [10] [16]. This is done by taking values of  as 0 o and 90 o .…”

Section: Numerical Resultsmentioning

confidence: 99%

“…3(i-x) for both pitch angles there are no band gaps. In our Previous work done [10] for the reverse boundary condition we had obtained band gaps for the various pitch angles namely 10°,20°,30°. Due to using similar parameters except for the pitch angle, we conclude that the change in pitch angle is one of the factors contributing to the band gaps observed when implementing the reverse boundary condition.…”

Section: Numerical Resultsmentioning

confidence: 99%

“…Previously, we have completed the mathematical derivation for both reverse and normal boundary conditions. Details of the derivation are found in [10] and [16] respectively.…”

Section: Introductionmentioning

confidence: 99%

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Model Dispersion Analysis of Circular Waveguide in Normal and Reverse Boundary Condition

2019

IJRTE

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The dispersion characteristics of the circular step index fiber with helical windings between the core-cladding region is investigated. Sheath helix is wounded between the core and cladding using two directions, namely in the clock wise and anticlockwise direction. Substituting the field components into the modified boundary conditions due to the addition of the helical windings the modal characteristics are derived for both fibers. Representations of the helical windings are done by using normal boundary conditions and reverse boundary conditions. The Eigen equation is obtained in the form of Bessel functions and modified Bessel functions for both the waveguides. The dispersion curves are plotted for two specific pitch angles ψ=0° and ψ=90 for each fiber and the results are compared. The direction of wrapping the helical material results in a change in the dispersion properties with regards to the way the modes propagate in both fibers. These changes are seen by the presents and absence of (1) band gap,(2) splitting of modes and (3) adjacent modes depending on the direction and pitch angle of the helical windings. Results obtained in this work suggest that direction and pitch angle of the helical winding are parameters that are able to control the behavior of the modes.

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Section: For 90  supporting

confidence: 58%

Section: Discussionmentioning

confidence: 92%

Section: Numerical Resultsmentioning

confidence: 99%

Section: Numerical Resultsmentioning

confidence: 99%

“…Previously, we have completed the mathematical derivation for both reverse and normal boundary conditions. Details of the derivation are found in [10] and [16] respectively.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Model Dispersion Analysis of Circular Waveguide in Normal and Reverse Boundary Condition

2019

IJRTE

View full text Add to dashboard Cite

show abstract

Analysis of the propagation characteristics of circular step-index fibre with new sheath helix boundary condition

Cited by 1 publication

References 6 publications

Model Dispersion Analysis of Circular Waveguide in Normal and Reverse Boundary Condition

Model Dispersion Analysis of Circular Waveguide in Normal and Reverse Boundary Condition

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