Optical waveguides – With splice – Fusion splicing
Reexamination Certificate
2005-05-03
2005-05-03
Lee, John R. (Department: 2881)
Optical waveguides
With splice
Fusion splicing
C385S095000, C385S097000, C385S098000
Reexamination Certificate
active
06886998
ABSTRACT:
An object is to provide an optical fiber fusion splicing method in which splice loss can be reduced, and also to provide an arc-heating unit used for heating the fusion spliced part of an optical fiber. The method comprises a process of fusion-splicing together the end faces of two optical fibers and a process of continuously heating the fusion spliced part by arc while moving one pair of electrodes provided opposite to each other across the fusion spliced part. The arc heating process is performed with the operation for decreasing arc temperature. The operation for decreasing arc temperature may be achieved by flowing a gas having a molecular weight greater than the average molecular weight of air into a gas atmosphere in which arc heating is performed, or by adding a modulation to an electric discharge current such that the maximum value becomes equal to or more than an electric current for starting arc discharge and the minimum value becomes more than zero and less than the electric current for starting arc discharge.
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K. Ohzawa, S. Yaguchi, J. Suzuki, N. Kawanishi, and S. Saito, “Development of New Optical Fiber Fusion Splicer for Factory Use,”International Wire&Cable Symposium Proceedings, 1999, pp. 644-649.
Kasuu Osamu
Kayou Shinji
Moriya Tomomi
Nakamura Motonori
Sano Tomomi
Lee John R.
McDermott Will & Emery LLP
Sumitomo Electric Industries Ltd.
Vanore David A.
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