Manufacturing method of an optical fiber coupler

Details Manufacturing method of an optical fiber coupler Manufacturing method of an optical fiber coupler

1991-08-23

1992-12-15

Lindsay, Robert L.

Glass manufacturing

Processes

Forming product or preform from molten glass

65 43, 385 43, 385 96, C03B 3710, G02B 628

Patent

active

051713454

ABSTRACT:
The present invention provides a manufacturing method for an optical fiber coupler, the optical characteristic of which is less dependent on wavelength. In the manufacturing method, a coupling region is formed by fusion-bonding and extending parts of a plurality of optical fibers arranged to be closely touching each other. At least one of the optical fibers is extended at a speed different from that of the other optical fibers when a low-temperature heat source is applied to soften the optical fibers. When the temperature of the low-temperature heat source is raised to form a high-temperature heat source, the extended parts of the closely touching optical fibers are fusion-bonded. When the temperature of the high-temperature heat source is then lowered to form a low-temperature heat source again, the fusion-bonded part can be extended further. In one embodiment, the fibers are twisted before fusion bonding the fibers.

REFERENCES:
patent: 4798436 (1989-01-01), Mortimore
patent: 4798438 (1989-01-01), Moore et al.

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