C - Chemistry – Metallurgy – 03 – B
Patent
C - Chemistry, Metallurgy
03
B
C03B 37/027 (2006.01)
Patent
CA 2683269
A method of manufacturing an optical fiber preform, the method comprising: providing a substantially elongated core preform made out of a core fluorinated glass; providing a substantially elongated and substantially tubular cladding preform made out of a cladding fluorinated glass, the cladding preform defining a bore extending substantially longitudinally therethrough; inserting the core preform into the bore of the cladding preform; fusing the core preform and the cladding preform to each other to produce an intermediate preform; heating the intermediate preform up to a stretching temperature, the stretching temperature being such that the core and cladding fluorinated glasses both have a viscosity of between 10 -7 and 10 -9 Pa s at the stretching temperature; stretching the intermediate preform at the stretching temperature to produce a stretched intermediate preform; and cutting a section of the stretched intermediate preform. Typically, the stretching temperature is between a vitreous transition temperature and a crystallization temperature of the core and cladding glasses.
Saad Mohammed
Tessier Louis
LandOfFree
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