Results 251 to 260 of about 2,268,510 (290)

Leaky modes on a dielectric waveguide: orthogonality and excitation

Applied Optics, 1976
Because they are not proper spectral modes, leaky modes do not obey the usual power orthogonality relations for an ideal waveguide. Two methods for circumventing this problem are presented in this paper. One approach is to use the fact that weakly leaky modes are approximately power orthogonal within a restricted region of space to define a new set of ...
R, Sammut, A W, Snyder
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Tunneling leaky modes in a parabolic index fiber

Applied Optics, 1976
Single or close to single tunneling leaky modes have been prism coupled into nominally parabolic index SEL-FOC fibers with effective efficiencies on the order of 10%. The mode parameters fit fairly well to an analytical continuation of the solutions to Gloge and Marcatili's equations for parabolic index fibers.
S, Zemon, D, Fellows
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Leaky modes in optical waveguides

Optical and Quantum Electronics, 1985
Solutions of the scalar wave equation are presented giving, explicitly, the excitation and subsequent attenuation of leaky modes in optical waveguides.
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On leaky modes on a buoyancy interface

Dynamics of Atmospheres and Oceans, 1979
Abstract When the fluid below a buoyancy interface such as the seasonal thermocline in the ocean is stably stratified as it is often, energy radiation by internal waves into regions deep below is possible. In this paper, the dispersion relation for a sharp thermocline separating a well-mixed layer from a weakly but stably stratified fluid below is ...
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Orthogonality Conditions for Leaky Modes

Radiophysics and Quantum Electronics, 2005
We consider various approaches for normalization of leaky modes of open waveguides. General properties of such modes and their relation to continuous-spectrum modes are studied. Applicability of perturbation theory for calculating the shift of mode propagation constants in the case of small variations in the waveguide structure is discussed.
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Leaky modes of nonlinear waveguides

2009 International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory, 2009
The leaky modes of planar waveguides with layered walls, consisting of nonlinear materials, are studied. The behaviour of the propagation coefficients are analyzed by the analytical and numerical techniques. The nonlinearity of the media is shown to change the modal dispersion characteristics.
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On the Excitation of Leaky Modes in Cylindrical Loops

Solar Physics, 2007
The role of leaky waves in the coronal loop oscillations observed by TRACE is not yet clearly understood. In this work, the excitation of fast waves in solar coronal loops modelled as dense plasma cylindrical tubes in a uniform straight magnetic field is investigated.
J. Terradas, J. Andries, M. Goossens
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Leaky bound modes in planar waveguides

1999 IEEE LEOS Annual Meeting Conference Proceedings. LEOS'99. 12th Annual Meeting. IEEE Lasers and Electro-Optics Society 1999 Annual Meeting (Cat. No.99CH37009), 2003
We propose a new and efficient method of analyzing leaky waveguides where we graphically find the extreme reflectivity of a light ray incident from one side of the outermost cladding toward the leaky waveguide. Such a field, called the leaky bound mode by us, is briefly described and numerical examples are presented.
null Shiao-Min Tseng, null Chung-I Lin
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Excitation of leaky modes on multilayer stripline

1996 IEEE MTT-S International Microwave Symposium Digest, 2002
The practical issue of excitation of leaky modes on multilayered stripline structures is analyzed. The excitation is studied by calculating the current on the strip conductor due to a source. The GPOF method is used to investigate the physical meaning of the leaky modes.
C. Di Nallo, F. Mesa, D.R. Jackson
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What Is a Quantized Mode of a Leaky Cavity?

2001
Quantum optics conventionally represents the electromagnetic radiation in a leaky cavity by a normal-modes expansion, as if the cavity were closed and perfect, with the leakage being described by coupling these modes to a reservoir. This phenomenological approach is only a good approximation for stable resonators with very large quality factors.
S.M. Dutra, G. Nienhuis
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