Method of manufacturing a preform for asymmetrical optical fiber

Details Method of manufacturing a preform for asymmetrical optical fiber Method of manufacturing a preform for asymmetrical optical fiber

1987-06-29

1989-05-30

Schor, Kenneth M.

Glass manufacturing

Processes

Forming product or preform from molten glass

65 421, 65 182, 427163, 427167, C03B 37018

Patent

active

048347868

ABSTRACT:
Disclosed is a method of manufacturing a preform for an asymmetric optical fiber which comprises the steps of (a) fixing plural transparent glass rods involving at least one core-mother rod functioning as the core in said optical fiber in parallel relationship, (b) depositing glass soot around an assembly of said plural parallel fixed glass rods, thereby providing a single porous cladding bearing the predetermined shape, and (c) vitrifying the porous cladding by thermal fusion, thereby providing the entirely integral transparent preform. The above method does not involve any process of perforating a drilled-pore which is needed inevitably in conventional method. Therefore, it is possible to obtain a long preform with high dimensional precision, and to fabricate the optical fiber with low transmission loss.

REFERENCES:
patent: 3637434 (1972-01-01), Nakamura et al.
patent: 3775075 (1973-11-01), Keck et al.
patent: 4062318 (1977-12-01), Ban et al.
patent: 4217027 (1980-08-01), MacChesney et al.
patent: 4359267 (1982-11-01), Appez
patent: 4395270 (1983-07-01), Blankenship et al.
patent: 4428979 (1984-01-01), Nakamura
patent: 4561871 (1985-12-01), Berkey
Fourth International Conference on Integrated Optics and Optical Fiber Communication; Post-Deadline Paper, Technical Digest (Jun. 27-30, 1983).

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