Journal ArticleDOI
Mode behaviour on bent planar dielectric waveguides
S.J. Garth
- Vol. 142, Iss: 2, pp 115-120
TLDR
In this paper, a nonperturbative analysis of the field and propagation constant changes in a bent step index planar waveguide is presented, with the aim of investigating limitations on standard perturbation theory.Abstract:
A nonperturbative analysis of the field and propagation constant changes in a bent step index planar waveguide is presented, with the aim of investigating limitations on standard perturbation theory. Mode behaviour for two extreme regimes in which perturbation theory is no longer valid are demonstrated: single-mode guides with very small bend radius ( approximately 1 mm), in which the field in the cladding becomes oscillatory, and large multimode structures bent with a constant radius of curvature. Equations are derived for the dispersion relation whose solutions give the real propagation constant of the bent waveguide.read more
Citations
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Journal ArticleDOI
Improved Bend Loss Formula Verified for Optical Fiber by Simulation and Experiment
R.T. Schermer,J. H. Cole +1 more
TL;DR: In this article, an improved curvature loss formula for optical waveguides is presented, which is shown to accurately predict the bend loss of both single-mode and multimode fibers.
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Nonperturbative calculation of bend loss for a pulse in a bent planar waveguide
TL;DR: In this paper, the scalar Helmholtz equation for a step-index planar waveguide with a constant bend radius and assuming a bend radius large in comparison to the core half-width yields a differential equation whose solutions can be written in terms of Airy functions.
Journal ArticleDOI
Investigation of Planar and Helical Bend Losses in Single- and Few-Mode Optical Fibers
Ashitosh Venkatasai Velamuri,Krupal Patel,Ishan Sharma,S.S. Gupta,Sandeep Gaikwad,Pradeep Kumar Krishnamurthy +5 more
TL;DR: In this paper, the authors describe experimental, simulation, and analytical approaches to study bend losses in single and few-mode optical fibers bent into a circle (in-plane bend) and helix.
Journal ArticleDOI
Efficient curvature analysis of buried waveguides
Phillip Sewell,Trevor M. Benson +1 more
TL;DR: In this article, the authors extended the free space radiation mode method for determining the lossy modes of curved buried semiconductor waveguides with an accuracy comparable to that of more computationally intensive methods.
Journal ArticleDOI
Modes on a bent nonlinear waveguide: solutions based upon the method of perturbations
TL;DR: In this paper, the changes to the field profile and propagation constant for a continuously bent nonlinear slab waveguide are investigated analytically by using a first-order perturbation theory.