Glass manufacturing – Processes – Forming product or preform from molten glass
Patent
1985-02-15
1986-11-18
Schor, Kenneth M.
Glass manufacturing
Processes
Forming product or preform from molten glass
65 301, 65 32, C03B 3701
Patent
active
046233733
ABSTRACT:
The present invention relates to a technique for infusing and maintaining a gas-in-glass fiber. In the present technique, a length of an optical fiber, e.g., a single mode fiber, is placed in a pressure vessel with the ends of the fiber protruding from the vessel walls through seals. The vessel is then partially or fully filled with a medium, such as a gas or water, and the vessel sealed. In one embodiment, a container, including both the predetermined gas under pressure and a rupture disc in a container wall, is disposed within the vessel. Pressure is then applied to the sealed vessel until the rupture disc implodes and releases the gas for subsequent infusion. In a second embodiment, the predetermined gas is introduced into the vessel from an outside pressurized source until a first predetermined pressure is obtained within the vessel. A predetermined amount of additional pressure from a second pressure source is then supplied to the vessel until a second predetermined pressure is reached in the vessel. Once the final pressure is achieved by either embodiment, the vessel is maintained in this state.
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AT&T Bell Laboratories
Pfeifle Erwin W.
Schor Kenneth M.
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