Field Cutoffs of Three-Layer Parabolically DeformedPlanar Chirowaveguides

Singh, Kuldeep; Choudhury, Pankaj Kumar; Misra, Vandana; Khastgir, P.; Ojha, S. P.

doi:10.1143/jpsj.62.3778

Cited by 18 publications

(3 citation statements)

References 11 publications

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“…A variety of efforts have been made by researchers to explore new features arising in waveguides composed of chiral media (e.g., [2] and references therein, and [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19]). One such feature is the bifurcation of waveguide dispersion, which exists in various chiral waveguides.…”

Section: Introductionmentioning

confidence: 99%

Modal bifurcation in chiral multilayered fibers

Cao

2013

J. Opt. Soc. Am. B

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In this paper, we investigate the modal bifurcation in chiral multilayered fibers through an approach of rigorous modal theory. The mirror symmetry of this theory is presented to provide physical insights into the modal bifurcation. The modes that are double degenerate and mirror images originally in achiral fibers are bifurcated by the chirality in chiral fibers. The modal bifurcation in chiral Bragg fibers is examined as an application of the theory. General guidelines of designing chiral Bragg fibers to possess circular polarization selectivity and wavelength selectivity are proposed from physical considerations and verified by numerical calculations.

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Section: Introductionmentioning

confidence: 99%

Modal bifurcation in chiral multilayered fibers

Cao

2013

J. Opt. Soc. Am. B

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“…Several types of fibers implementing different composite materials [1][2][3][4][5][6][7] and/or cross-sectional geometries [8][9][10][11][12][13][14][15][16][17][18][19][20][21] have been reported in the literature. Among the various fiber structures, tapered optical fiber is certainly one of the important and interesting means for optical transmission as these are widely used for optical couplers.…”

Section: Introductionmentioning

confidence: 99%

Propagation Characteristics of Tapered Core Helical Cald Dielectric Optical Fibers

Siong

Choudhury

2009

Journal of Electromagnetic Waves and Applications

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Using Maxwell's equations subject to suitable boundary conditions, a preliminary investigation of the propagation characteristics of a tapered optical fiber with helical windings is performed. Eigenvalue relations are developed followed by the discussion on the cutoff situations. Plots of the dispersion relations are presented corresponding to two particular values of the helical pitch angle, namely 0 • and 90 • , and the results are compared. It is observed from the dispersion relations that the helix pitch angle would greatly affect the modal characteristics of the guide, making thereby the angle of pitch as one of the dominant controlling parameters, so far as the fiber design is considered. This is further verified through the comparison of results with those obtained for dielectric tapered fibers without helical windings.

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“…Since the transmission properties of optical waveguides essentially depend on the cross-sectional geometry and the nature of the material used to fabricate the guide, considerable amount of investigations have been dedicated towards the wave propagation through guides of varieties of cross-sections [1][2][3][4][5][6][7][8][9][10][11][12][13] as well as composites [14][15][16][17][18][19][20]. Most of the explored optical waveguides are now widely recognized, and implemented in various issues related to optics and photonics.…”

Section: Introductionmentioning

confidence: 99%

On the Field Patterns of Helical Clad Dielectric Optical Fibers

Safie¹,

Choudhury²

2009

PIER

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Abstract-An analytical investigation of the lightwave propagation through dielectric optical fibers with helical clads is presented with the emphasis on their hybrid field patterns. The helical clad section is effectively realized by introducing conducting windings on the core-clad boundary. Using Maxwell's equations, a rigorous analytical approach is implemented to determine the higher order field patterns in such fibers. For simplicity, two particular values of the helix pitch angle are considered, viz. 0 • and 90 • . The nature of fields is presented in both the situations corresponding to different allowed values of the propagation constants and the fiber diameters. The radial distributions of fields corresponding to hybrid modes are presented under different situations, which exhibit the patterns like spikes. The observed smooth match of the fields at the core-clad interface validates of our analytical approach. The presence of a little higher amount of field in the fiber clad section is essentially attributed to the helical windings introduced over the fiber core. Further, the existence of considerable amount of evanescent waves in such fibers opens up the possibility of their applications in optical sensing.

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Field Cutoffs of Three-Layer Parabolically DeformedPlanar Chirowaveguides

Cited by 18 publications

References 11 publications

Modal bifurcation in chiral multilayered fibers

Modal bifurcation in chiral multilayered fibers

Propagation Characteristics of Tapered Core Helical Cald Dielectric Optical Fibers

On the Field Patterns of Helical Clad Dielectric Optical Fibers

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