Browsing Physics by Issue Date
Now showing items 120 of 342

Nonlinear reflection and transmission of electromagnetic waves by moving plasmas
(1971)Based on the covariance principle of Maxwell's equations and phaseinvariance principle (derived from the special theory of relativity), expressions for the nonlinear reflection and transmission of electromagnetic waves ... 
Distortion of electromagnetic pulses undergoing total internal reflection from a moving dielectric halfspace
(1973)Using the covariance of Maxwell's equations and the phase invariance principle of plane waves, distortion of the electromagnetic pulses undergoing total internal reflection from a moving dielectric halfspace has been ... 
Propagation of waves in a medium varying transverse to the direction of propagation
(1974)For an inhomogeneous dielectric in which the dielectric constant ε depends onxonly, it has been shown that it is possible to consider modes propagating in thezdirection havingH_{x} = 0orE_{x} = 0such that other field ... 
Modes in inhomogeneous slab waveguides
(1974)In this correspondence we have developed the perturbation approach for the calculation of propagation constants for some of the practical slab waveguides and have shown the applicability of the approach to systems of ... 
Modes in optical waveguides formed by silversodium ion exchange
(1978)Exact solutions of the scalar wave equation for the guided modes of planar optical waveguides formed by silversodium ion exchange have been obtained. It has been shown that there is good agreement between the exact solution ... 
Calculation of cutoff frequencies in optical fibers for arbitrary profiles using the matrix method
(1981)We here propose a simple numerical procedure to calculate the cutoff frequencies in optical fibers with any arbitrary refractive index profile including discrete numerical data from profile measurement. The cutoff problem ... 
Propagation characteristics of single mode optical fibers with arbitrary index profiles: A simple numerical approach
(1982)We present here a rapidly converging numerical procedure for the direct evaluation of the propagation constant and its first and second derivatives in single mode optical fibers with arbitrary refractive index profiles. ... 
Analytical approximations for the propagation characteristics of dualmode fibers
(1983)In this paper we present accurate analytical approximations for the modal fields of dualmode optical fibers with power law profiles based on a scalar variational analysis. We propose single parameter and two parameter ... 
Matrix method for determining propagation characteristics of optical waveguides
(1983)We have transformed the scalar wave equation into a matrix eigenvalue equation, the diagonalization of which gives the guided modes and a discrete representation of the radiation modes. The method is simple and can be used ... 
Analysis of single mode inhomogeneous planar waveguides
(1986)A new method for obtaining the propagation characteristics of single mode inhomogeneous planar waveguides is presented. The method is based on the scalar variational principle and a new trial fieldthe cosineexponential ... 
Analysis of tunable singlemode fiber directional couplers using simple and accurate relations
(1986)We present simple and accurate relations for the study of parallel and curved tunable singlemode fiber directional couplers employing stepindex or gradedindex fibers. Analytical results for the various coupler parameters ... 
Analysis of tunable singlemode fiber directional couplers using simple and accurate relations
(1986)We present simple and accurate relations for the study of parallel and curved tunable singlemode fiber directional couplers employing stepindex or gradedindex fibers. Analytical results for the various coupler parameters ... 
Polarization characteristics of ellipticcore fibers with stress induced anisotropy
(1987)We present a simple analytical method to study birefringence and polarization mode dispersion (PMD) of ellipticcore fibers with uniform or differential stress in the fiber cross section. The model takes account of both ... 
Numerical analysis of planar optical waveguides using matrix approach
(1987)We present here a simple matrix method for obtaining propagation characteristics, including losses for various modes of an arbitrarily graded planar waveguide structure which may have media of complex refractive indices. ... 
Design and analysis of a novel polarisation splitting directional coupler
(1988)The authors present a novel polarisation splitting directional coupler configuration consisting of two interacting optical waveguides with a thin layer of metal between the two waveguides. Using Ghatak et al.'s (see J. ... 
Singlemode optical waveguides and directional couplers with rectangular cross section: a simple and accurate method of analysis
(1988)A new method for obtaining the propagation characteristics of singlemode optical waveguides with rectangular cross section is presented. The method is based on the scalar variational principle using the cosineexponential ... 
A simple and accurate model analysis of striploaded optical waveguides with various index profiles
(1988)A simple firstorder perturbation approach has been developed to study the propagation characteristics of striploaded diffused waveguides with various refractive index profiles. Propagation constants of the guided modes ... 
Exact relationships between field and dispersion of singlemode fibres in presence of material and linear profile dispersion
(1988)Exact explicit relationships relating the Petermann spot size to the propagation constant and its wavelength derivatives are derived including the effect of material and profile dispersion. An explicit expression for the ... 
Simple technique to estimate spot sizes from far fields of singlemode fibres
(1988)Accurate estimates of two characteristic spot sizes, W rms and Wp, based on measurements of farfield angles &thetas;3 dB and &thetas;40 dB made on two singlemode fibres of widely differing refractive index profiles ... 
Numerical analysis of optical fibers using matrix approach
(1988)The authors conduct a numerical analysis of optical fibers characterized by arbitrarily graded, cylindrically symmetric refractive index profiles by transforming them into equivalent planar profiles and using a matrix ...