Method of manufacturing a preform for asymmetrical optical...

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

C - Chemistry, Metallurgy

03

B

117/86, 49/8.8

C03B 37/018 (2006.01) C03B 37/014 (2006.01)

Patent

CA 1300886

Abstract of the Disclosure Disclosed is a method of manufacturing a preform for an asymmetric optical fiber which comprises the steps of (a) fixing plural transparent glass rods in- volving 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 trans- parent 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 demensional precision, and to fabricate the optical fiber with low transmission loss.

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