Optical waveguides – With optical coupler – Particular coupling structure
Patent
1990-06-01
1992-06-09
Lee, John D.
Optical waveguides
With optical coupler
Particular coupling structure
385 43, 385 96, 385 48, G02B 626
Patent
active
051214520
ABSTRACT:
Fiber optic power splitters having a central fiber and a selected number of surrounding fibers spaced periodically around the central fiber and the method of fabricating such splitters are described. For splitters having between three and five surrounding fibers, the central fiber is made to have a reduced diameter relative to the surrounding fibers so that it contacts each of the surrounding fibers and each of the surrounding fibers, likewise, touches each of its neighboring fibers. For splitters having seven or more surrounding fibers, the diameters of the surrounding fibers are reduced relative to the central fiber so that mutual contact is made among the set of equal diameter surrounding fibers and the central fiber. The equation governing the relative diameters of the central and surrounding fibers, and methods of obtaining uniform diameter reduction in an optical fiber are described. Single-mode splitters made according to these means have relatively low variation of splitting fraction with variations of input optical power wavelength and can be made to distribute optical power input in any fiber among, e.g. three to seventeen outputs according to predeterminable relationships. Of particular practical importance, splitters can be made which split one input into four, eight, twelve, or sixteen equal outputs, having a flattened response over a significant wavelength range.
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Corke Michael
Stowe David W.
Aster Corporation
Lee John D.
Ngo John
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