Optical fiber coil and manufacturing method thereof
AssigneeSumitomo Electric Industries, Ltd.
InventorsKenji Tamano, Takashi Fujii
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Abstract
An optical fiber coil of the present invention includes an optical fiber, a storing case which stores the coiled optical fiber therein, and a filler in the storing case. The filler directly comes into contact with the glass portion of the optical fiber or contact with a thin film coating of not more than 1 μm being formed on a surface of the glass portion and having a hydrogen intrusion suppressing function. According to the optical fiber coil of the present invention, since the filler directly comes into contact with the glass portion of the optical fiber, the microbend loss can be further suppressed and the transmission can be stable.
Claims12
An optical fiber coil comprising;
- an optical fiber including a core and a cladding which are made of a glass portion,
- a storing case accommodating said optical fiber which is wound into a coil bundle, and
- a filler filled in the inside of said storing case, wherein said filler is filled in said storing case in a state that said filler directly comes into contact with said glass portion or in a state that said filler directly comes into contact with a thin film coating of not more than 1 μm being formed on a surface of said glass portion and having a hydrogen intrusion suppressing function.
A method of manufacturing an optical fiber coil comprising;
- a coiling step for forming an optical fiber having a resin coating layer on a periphery of a glass portion including a core and a cladding into a coil bundle,
- a coating layer removing step for removing said resin coating layer from said optical fiber formed into a coil bundle,
- a storing step for storing said optical fiber from which said resin coating layer is removed into a storing case, and
- a filling step for filling a filler into said storing case.
Dependencies are inferred from the claim text.