Optical fiber preform

Stock material or miscellaneous articles – Hollow or container type article – Glass – ceramic – or sintered – fused – fired – or calcined metal...

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428 344, 428 345, 428428, 428212, 385124, 385127, A47G 1922, G02B 602, B32B 702, B32B 900

Patent

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059422963

ABSTRACT:
Disclosed is an optical fiber possible to prevent it from increasing an optical loss occurring during fabrication of a single mode fiber preform and extraction thereof and enhance an optical transmission efficiency, a method of producing the same comprising the steps of forming a first quartz tube having a first thermal conductivity, said first quartz tube being used as a clad; depositing a core layer and a clad layer inside said first quartz tube to form a preliminary perform by heating of said fist quartz tube; forming a second quartz tube having a second thermal conductivity lower than said first thermal conductivity; and depositing said second quartz tube to said preliminary preform by heating to produce said optical fiber preform.

REFERENCES:
patent: 4165915 (1979-08-01), Rau et al.
patent: 4772303 (1988-09-01), Kamiya et al.
patent: 4978377 (1990-12-01), Brehm
Optical Fiber Communication, Feb. 20-25, 1994 vol. 4, 1994 Technical Digest Series, Conference Edition.
Heat Transfer, Seventh Edition in Si Units by J.P. Holman, McGraw-Hill Book Company. (pp. 151-155).

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