On electromagnetic wave propagation in an optical fiber having a core radius with a periodic axial variation

Sangeeta Sinha, P. Khastgir, S. P. Ojha, Pankaj Kumar Choudhury

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

A study is made of the modal properties of electromagnetic waves propagating along a dielectric fiber having a periodically varying core cross-sectional size along the direction of propagation. The maximum variation of the core radius is assumed to be small, and a full cycle of variation occurs over a large change in the axial variable z compared with the core radius. The general characteristic equation and cutoff conditions are derived, assuming that the component of the propagation vector β along the axis varies with the axial coordinate z. In general, β is complex, showing an attenuation or a reinforcement because of alternate flair and constriction. As an illustration, a numerical estimate of ∂β / ∂z as a function of z is made for some modes with simple and special properties where attenuation is negligible, and the axial electric and magnetic fields are in phase. The method can easily be extended to include more general cases by means of straightforward but tedious numerical work.

Original languageEnglish
Pages (from-to)335-339
Number of pages5
JournalMicrowave and Optical Technology Letters
Volume11
Issue number6
Publication statusPublished - 20 Apr 1996
Externally publishedYes

Fingerprint

Electromagnetic wave propagation
Electromagnetic waves
Optical fibers
wave propagation
electromagnetic radiation
Reinforcement
optical fibers
Electric fields
Magnetic fields
radii
Fibers
attenuation
propagation
characteristic equations
reinforcement
constrictions
cut-off
cycles
fibers
electric fields

Keywords

  • Electromagnetic wave propagation
  • Optical waveguides

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Atomic and Molecular Physics, and Optics

Cite this

On electromagnetic wave propagation in an optical fiber having a core radius with a periodic axial variation. / Sinha, Sangeeta; Khastgir, P.; Ojha, S. P.; Choudhury, Pankaj Kumar.

In: Microwave and Optical Technology Letters, Vol. 11, No. 6, 20.04.1996, p. 335-339.

Research output: Contribution to journalArticle

@article{887d0c91c7594b2e9e832d28dcc05345,
title = "On electromagnetic wave propagation in an optical fiber having a core radius with a periodic axial variation",
abstract = "A study is made of the modal properties of electromagnetic waves propagating along a dielectric fiber having a periodically varying core cross-sectional size along the direction of propagation. The maximum variation of the core radius is assumed to be small, and a full cycle of variation occurs over a large change in the axial variable z compared with the core radius. The general characteristic equation and cutoff conditions are derived, assuming that the component of the propagation vector β along the axis varies with the axial coordinate z. In general, β is complex, showing an attenuation or a reinforcement because of alternate flair and constriction. As an illustration, a numerical estimate of ∂β / ∂z as a function of z is made for some modes with simple and special properties where attenuation is negligible, and the axial electric and magnetic fields are in phase. The method can easily be extended to include more general cases by means of straightforward but tedious numerical work.",
keywords = "Electromagnetic wave propagation, Optical waveguides",
author = "Sangeeta Sinha and P. Khastgir and Ojha, {S. P.} and Choudhury, {Pankaj Kumar}",
year = "1996",
month = "4",
day = "20",
language = "English",
volume = "11",
pages = "335--339",
journal = "Microwave and Optical Technology Letters",
issn = "0895-2477",
publisher = "John Wiley and Sons Inc.",
number = "6",

}

TY - JOUR

T1 - On electromagnetic wave propagation in an optical fiber having a core radius with a periodic axial variation

AU - Sinha, Sangeeta

AU - Khastgir, P.

AU - Ojha, S. P.

AU - Choudhury, Pankaj Kumar

PY - 1996/4/20

Y1 - 1996/4/20

N2 - A study is made of the modal properties of electromagnetic waves propagating along a dielectric fiber having a periodically varying core cross-sectional size along the direction of propagation. The maximum variation of the core radius is assumed to be small, and a full cycle of variation occurs over a large change in the axial variable z compared with the core radius. The general characteristic equation and cutoff conditions are derived, assuming that the component of the propagation vector β along the axis varies with the axial coordinate z. In general, β is complex, showing an attenuation or a reinforcement because of alternate flair and constriction. As an illustration, a numerical estimate of ∂β / ∂z as a function of z is made for some modes with simple and special properties where attenuation is negligible, and the axial electric and magnetic fields are in phase. The method can easily be extended to include more general cases by means of straightforward but tedious numerical work.

AB - A study is made of the modal properties of electromagnetic waves propagating along a dielectric fiber having a periodically varying core cross-sectional size along the direction of propagation. The maximum variation of the core radius is assumed to be small, and a full cycle of variation occurs over a large change in the axial variable z compared with the core radius. The general characteristic equation and cutoff conditions are derived, assuming that the component of the propagation vector β along the axis varies with the axial coordinate z. In general, β is complex, showing an attenuation or a reinforcement because of alternate flair and constriction. As an illustration, a numerical estimate of ∂β / ∂z as a function of z is made for some modes with simple and special properties where attenuation is negligible, and the axial electric and magnetic fields are in phase. The method can easily be extended to include more general cases by means of straightforward but tedious numerical work.

KW - Electromagnetic wave propagation

KW - Optical waveguides

UR - http://www.scopus.com/inward/record.url?scp=0030126602&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0030126602&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0030126602

VL - 11

SP - 335

EP - 339

JO - Microwave and Optical Technology Letters

JF - Microwave and Optical Technology Letters

SN - 0895-2477

IS - 6

ER -