Patent
1988-09-12
1990-04-10
Sikes, William L.
G02B 626, G02B 642
Patent
active
049154672
ABSTRACT:
An optical fiber coupler is formed by providing a glass tube having a longitudinal aperture. Two contiguous carbon tubes are disposed within the longitudinal aperture which is thereafter collapsed thereon. A glass capillary tube is formed by removing the carbon tubes. The tube can be stretched, overcoated with additional glass, and again stretched to form a precision capillary tube which is severed into coupler-length tubes. Two optical fibers, which are shorter in length than the aperture of a coupler-length tube, are centered in that aperture. The midregion of the resultant assembly is heated and collapsed about central portions of the fibers. The central region of the resultant coupler preform is heated and drawn to reduce the diameter thereof. The end regions of the aperture, which are not diminished in size by the aforementioned processing, function as receptacles into which optical fibers can be inserted to make connection to the coupler.
REFERENCES:
patent: 4679894 (1987-07-01), Pavlath
patent: 4779945 (1988-10-01), Hill et al.
patent: 4786130 (1988-11-01), Georgiou et al.
patent: 4798434 (1989-01-01), Dammann et al.
patent: 4834481 (1989-05-01), Lawson et al.
Corning Incorporated
Sikes William L.
Simmons William J.
Wise Robert E.
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