Journal ArticleDOI
Tolerance Requirements for Dispersion Free Single-Mode Fiber Design: Influence of Geometrical Parameters, Dopant Diffusion, and Axial Dip
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TLDR
In this paper, the dispersion sensitivity to small changes in index-differences, radius, and wavelength is investigated in the case of dispersion free single-mode fibers, and the tolerances on the various parameters can then be deduced: singly and doublyclad structures are compared.Abstract:
The dispersion sensitivity to small changes in index-differences, radius, and wavelength is investigated in the case of dispersion free single-mode fibers. If a minimum bandwidth is required, tolerances on the various parameters can then be deduced: singly- and doubly-clad structures are compared. Constant reference is made to the HE/sub 11/ mode spot-size to relate dispersion properties and attenuation. A nonzero fundamental mode cutoff is shown to induce an enhanced sensitivity to a change in fiber geometrical characteristics. The effect of dopant diffusion and axial dip on dispersion is then considered and conclusions are drawn concerning the use of profiles measured on preforms to predict fiber propagation properties.read more
Citations
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Journal ArticleDOI
Zero dispersion in attenuation optimized doubly clad fibers
TL;DR: In this paper, the optimum inner-cladding depth for a weakly guiding single-mode fiber was determined based on criteria of both sensitivity to bending and fabrication tolerances or by requiring a given mode dispersion behavior over a wide spectral range.
Journal ArticleDOI
Design considerations of dispersion-free dual-mode optical fibers: 1.55 µm wavelength operation
M. Cvijetic,G. Lukatela +1 more
TL;DR: In this paper, a dual-mode optical fiber with a core diameter of 23 μm was proposed, which is much larger than the core diameter for conventional single-mode fibers and can be used for design of broad-band optical fibers.
Patent
Wide band dispersion-controlled fiber
TL;DR: In this article, a wide band dispersion-controlled fiber is considered, which comprises a core forming an optical signal transmission path and having a peak refractive index, and a cladding surrounding the core and having an index lower than the peak this article.
Journal ArticleDOI
W-type fiber design for application in U- and S-band amplifiers by controlling the LP01 mode long wavelength cut-off
TL;DR: In this paper, a passive band-pass filtering scheme was proposed to obtain a net gain in a band-competing system using a W-type fiber waveguide, slicing a shorter wavelength gain band out of a given stimulated emission cross-section.
Journal ArticleDOI
Calculation of parameter tolerances of near‐zero dispersion step‐index fiber for a specified bandwidth
A. Marincic,D. Miletic +1 more
TL;DR: In this paper, the authors present a method for easy calculation of allowed monomode fiber parameter tolerances which guarantee operation around the zero dispersion wavelength, and a statistical method is used to determine the relative tolerances.
References
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Journal ArticleDOI
Weakly guiding fibers.
TL;DR: Simple formulas and functions for the fiber parameters are presented as a help for practical design work that considers the propagation constant, mode delay, the cladding field depth, and the power distribution in the fiber cross section.
Journal ArticleDOI
Loss analysis of single-mode fiber splices
TL;DR: In this paper, the authors consider the possibility that the two fibers of different dimensions are separated in longitudinal direction and are tilted or offset with respect to each other, and the trade-off between slice tolerances with regard to tilt and offset is expressed as an uncertainty principle.
Journal ArticleDOI
Ultimate low-loss single-mode fibre at 1.55 μm
TL;DR: In this article, a very low loss singlemode fiber with a minimum loss of 0.20 dB/km at a wavelength of 1.55 μm is attained; this loss reaches the ultimate lower loss limit of silica-based optical glass fibre.
Journal ArticleDOI
Gaussian approximation of the fundamental modes of graded-index fibers
TL;DR: In this article, a direct numerical integration of the wave equation is used to establish the validity of approximating the fundamental mode of graded-index fibers by a Gaussian function, and the fundamental modes of fibers, whose index profile can be expressed as a power law, are indeed very nearly Gaussian in shape.
Journal ArticleDOI
Modes of optical waveguides
Allan W. Snyder,William R. Young +1 more
TL;DR: In this article, a simple method is presented for finding the modes on those optical waveguides with a cladding refractive index that differs only slightly from the core, and the resulting modal fields and their progagation constants display the polarization properties of the waveguide contained within the ∇ ∊ term of the vector wave equation.
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