Glass manufacturing – Processes – Forming product or preform from molten glass
Patent
1990-11-06
1991-12-31
Fisher, Richard V.
Glass manufacturing
Processes
Forming product or preform from molten glass
65 32, 65 311, 385115, C03B 2320
Patent
active
050768255
ABSTRACT:
A method for producing an optical multiple fiber unit wherein a multiplicity of optical fibers are fused together with each other and each optical fiber has a core made of pure silica glass and a cladding layer made of silica glass containing a dopant and disposed on the core, by bundling a multiplicity of preforms corresponding to the optical fibers and drawing the bundle at a high temperture using the optical fiber preforms, preforms having a three-layer construction wherein a support layer made of a silica glass having a drawable temperture of at least 1,800.degree. C. is further disposed on the cladding layer, and drawing the bundle of the preforms to give a multiple fiber wherein the support layer of each optical fiber has a thickness of 0.01 to 1 .mu.m, in order to produce a multiple fiber in which the cladding layer of each optical fiber has a sufficient thickness to fulfill the function as a cladding layer and which has an excellent image-transmitting capacity.
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Hayami Hiroyuki
Utsumi Atsushi
Bruckner John J.
Dainichi-Nippon Cables Ltd.
Fisher Richard V.
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