Glass-tube extended-baking process
AssigneeDraka Comteq B.V.
InventorsGuangjun Xu, Larry Zeng, Ivo Flammer, Dennis Robert Simons, Cedric Gonnet, Rob Hubertus Matheus Deckers
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Abstract
Disclosed is a method of heat treating quartz glass deposition tubes at between 900° C. and 1200° C. for at least 115 hours. The resulting deposition tubes are useful in forming optical preforms that can yield optical fibers having reduced added loss.
Claims20
An extended-baking method for improving the optical properties of a glass deposition tube, comprising the step of subjecting the glass deposition tube to heat-treatment at 900° C. or higher under reduced pressure of 100 millitorr or less for at least 115 hours.
A method for improving the optical properties of a glass tube via extended-baking heat treatment, comprising the step of subjecting the glass tube to heat-treatment at 900° C. or higher for at least 125 hours.
A method for improving the optical properties of a glass tube via extended-baking heat treatment, comprising the step of subjecting the glass tube to heat-treatment at about 1000° C. or higher under reduced pressure of between about 1 millitorr and 100 millitorr for at least 115 hours.
Dependencies are inferred from the claim text.