Finisar Corporation

Senlu Xu

Steve Wang

Johnny Zhong

The present invention is directed to a fused coupler having at least two fiber optic cables that have a positive coefficient of thermal expansion. A section of each of the fiber optic cables is placed together and heated until they form a single fused section that acts as a coupler. A jacket having a negative coefficient of thermal expansion, the absolute value of which is approximately equal to the absolute value of the positive coefficient of thermal expansion of the fiber optic cables, is placed around the fused section of the fiber optic cables. The jacket can be manufactured from a ceramic material that is specifically manufactured with a negative coefficient of thermal expansion. A filler material, such as an epoxy resin, is inserted in a gap between the jacket and the fused sections of the fiber optic cables such that the gap is filled in.

Athermal fused coupler package for optical fibers

Coupler packages for providing protection against the elements for fused fiber couplings. The coupler package has an inner and outer cylinder for providing additional buffering against vibration, temperature expansion, corrosion, and water penetration. The double tube structure increases the penetration length for water, while the seals decrease the cross section for water penetration.

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Fremont, CA, United States of America

Senlu Xu