Patent
1989-06-05
1990-10-09
Sikes, William L.
350 9615, G02B 610
Patent
active
049616188
ABSTRACT:
This invention relates to an improved optical communication system having an enhanced wide-core single-mode planar waveguide for transmitting a single-mode light wave in a unique manner. The system is generally made up of light-wave source means, the aforementioned waveguide and receiving means. The waveguide is generally made up of an inhomogeneous wide-core means of block-like configuration and opposed cladding means where one set of opposed sides of the waveguide are provided with the cladding means. The cladding means has a constant permittivity. The core means has an inhomogeneous permittivity profile, a part of which is greater than the cladding means permittivity and another part of which is less than the cladding means permittivity. The analogy of quantum mechanics with optics can provide an algorithm for an equivalent inhomogeneous quantum potential formula of curvilinear shape. This equivalent quantum potential can be computer solved and graphically plotted in relation to a multipole rational function for the transverse reflection coefficient for the intended propagating and radiating modes of the waveguide, all for advantageously determining the width and permittivity profile of the core means. As the result of this width and profile determination, an algorithmic inhomogeneous relative permittivity profile of curvilinear shape of the core means is computer solvable and graphically plottable for indicating the core modal structure and transmission characteristics. One suitable material for the waveguide is LiNbO.sub.3 where the core means thereof is provided with a selective amount of Ti dopant.
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Jordan Arthur K.
Lakshmanasamy S.
Goshorn Elmer E.
Heartney Phan T.
McDonnell Thomas E.
Sikes William L.
The United States of America as represented by the Secretary of
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