Showing papers on "Coupled mode theory published in 1974"
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01 Jan 1974
TL;DR: The asymmetric slab waveguide weakly guiding optical fibers coupled mode theory applications of the coupled power theory theory of the directional coupler grating-assisted direction couplers approximate and numerical methods nonlinear effects as discussed by the authors.
Abstract: The asymmetric slab waveguide weakly guiding optical fibers coupled mode theory applications of the coupled mode theory coupled power theory theory of the directional coupler grating-assisted direction couplers approximate and numerical methods nonlinear effects.
2,290 citations
TL;DR: It is suggested that aperiodic coupling may be used to realize optical-waveguide reflectors and filters having predetermined spectral-response characteristics and that the frequency dependence of such a coupling process can be controlled through the aperiodicity.
Abstract: Aperiodic distributed-parameter waveguides are considered for use as reflectors and filters in integrated optics. Coupled-mode theory is used to predict the effects on modal propagation of aperiodic perturbations induced in a slab waveguide. In particular, it is shown that aperiodic perturbations can couple forward-traveling bound modes to backward-traveling bound modes; and that the frequency dependence of such a coupling process can be controlled through the aperiodicity. It is suggested that aperiodic coupling may be used to realize optical-waveguide reflectors and filters having predetermined spectral-response characteristics. As examples, the spectral-response characteristics of a narrow band-stop filter, a broadband-stop filter, and a narrow band-pass filter are calculated and presented.
107 citations
TL;DR: In this paper, the wave-vector components in the uniaxial media transverse to the waveguide are shown to have ordinary or extraordinary characteristics, and exact mode-dispersion equations for the hybrid modes are derived.
Abstract: Waveguide mode propagation in optical waveguides containing uniaxial media is investigated. When the optical axis of each uniaxial medium lies in the plane containing the waveguide normal and the propagation direction, waveguide propagation is described by uncoupled TE and TM modes. The phenomenon of wave-front tilt is discussed and exact mode dispersion equations are derived. The experimentally convenient situation of the optic axis lying in the film plane is also analyzed. Here mode coupling between TE and TM polarizations occurs and the propagating modes are hybrid. The wave-vector components in the uniaxial media transverse to the waveguide are shown to have ordinary or extraordinary characteristics. Exact mode-dispersion equations for the hybrid modes are derived and are shown to differ substantially from the TE and TM mode approximations when the latter are near degeneracy.
79 citations
TL;DR: An estimate of the spread of light in the outer-segment layer of the human retina is derived and an approximate result for the lowest-order mode is compared with a result of coupled-mode theory.
Abstract: Some modes of a hexagonal array of parallel identical circular lossless dielectric rods are discussed. The electromagnetic boundary-value problem is solved by use of an expansion of the mode field in circular harmonics. The relation with the guided modes of the single isolated rod is investigated. An approximate result for the lowest-order mode is compared with a result of coupled-mode theory. An estimate of the spread of light in the outer-segment layer of the human retina is derived.
13 citations
TL;DR: In this paper, the power transfer between coupled thin-film optical waveguides is studied with respect to the tuning and the strength of coupling of the guides, and the experimental results show that the ray-optic theory is inadequate for the calculation of the spatial beat frequency of power exchange.
Abstract: The power transfer between coupled thin-film optical waveguides is studied with respect to the tuning and the strength of coupling of the guides. The experimental results show that the ray-optic theory is inadequate for the calculation of the spatial beat frequency of power exchange. When the effective-thickness concept based on phase arguments is introduced in the ray theory, a better agreement with observations is obtained, but it is found that only with the effective-thickness formula derived from energy-flow considerations is the theory in satisfactory agreement with the present measurements.
9 citations
01 Jan 1974
TL;DR: The asymmetric slab waveguide weakly guiding optical fibers coupled mode theory applications of the coupled power theory theory of the directional coupler grating-assisted direction couplers approximate and numerical methods nonlinear effects as discussed by the authors.
Abstract: The asymmetric slab waveguide weakly guiding optical fibers coupled mode theory applications of the coupled mode theory coupled power theory theory of the directional coupler grating-assisted direction couplers approximate and numerical methods nonlinear effects.
3 citations
01 Jan 1974
TL;DR: In this article, the interaction between two waves in nondissipative and dissipative systems is analyzed with the general principles of coupled mode theory, and it is shown that the character of the interaction is determined by the product CI~CU of the coupling coefficients.
Abstract: Absfrocf-The interaction between two waves in nondissipative and dissipative systems is analyzed with the general principles of coupled mode theory. It is shown that the character of the interaction is determined by the product CI~CU of the coupling coefficients. The extreme cases of purely real and purely imaginary values of ClzCtl correspond to the nondissipative and dissipative systems, respectively. The results of the analysis are applied to the case of ac0uat.c amplification. I. INTIZODUCTION