Method for connecting optical fibers, and heat treatment...

Details Method for connecting optical fibers, and heat treatment... Method for connecting optical fibers, and heat treatment...

2005-03-15

2005-03-15

Bovernick, Rodney (Department: 2874)

Optical waveguides

With splice

Fusion splicing

Reexamination Certificate

active

06866428

ABSTRACT:
Provided are connection methods and a heat treatment apparatus to be used in the method capable of readily applying heat treatment to a fusion-spliced portion of a connection line which is formed by fusion-splicing optical fibers of different kinds and capable of finishing the heat treatment with no excess or insufficiency.In the connection methods, after fusion-splicing the optical fibers of different kinds having different MFDs, the heat treatment is carried out to match the MFDs. At the same time, a dummy connection line of dummy optical fibers of different kinds is prepared, which is the same combination as the connection line of the optical fibers of different kinds to which the heat treatment is applied. While measuring connection loss in the dummy connection line directly or indirectly, the heat treatment is applied to the dummy connection line as well as the connection line. When a measured value of the connection loss in the dummy connection line lowers below a preset decision value of the time to finish the heat treatment, the heat treatment is finished. It is possible to readily finish the heat treatment at an appropriate timing without giving an excessive or insufficient heat treatment.

REFERENCES:
patent: 5142603 (1992-08-01), Forreste
patent: 6062743 (2000-05-01), Zheng et al.
patent: 6565269 (2003-05-01), Riis et al.
patent: 6705772 (2004-03-01), Nakamura et al.
patent: 2-6908 (1990-01-01), None

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