Glass manufacturing – Processes – Forming product or preform from molten glass
Patent
1976-03-25
1977-07-26
Lindsay, Jr., Robert L.
Glass manufacturing
Processes
Forming product or preform from molten glass
65 12, 65 13, 264 1, 425 76, C03B 3702
Patent
active
040380629
ABSTRACT:
The present invention relates to method and apparatus for fabricating multimode optical fiber waveguides having reduced modal dispersion as a result of deliberate enhancement of mode coupling in the waveguide. The axial alignment and/or the diameter of an optical fiber waveguide is varied by means of one or more modulated heat sources, such as, for example, a microflame jet or CO.sub.2 laser, directed against the fiber waveguide. By controlling the modulation of the heat source, the spatial distribution of the geometrical perturbation pattern can be controlled, thereby producing controlled mode coupling in the fiber waveguide.
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Bell Telephone Laboratories Incorporated
Lindsay, Jr. Robert L.
Pfeifle Erwin W.
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