Seikoh Giken Co., Ltd.

Tsuguo Sato

Mitsuo Takahashi

In an optical fiber ferrule assembly, a bare optical fiber, an end coating of which is removed, is inserted and fixed into the central hole of a ferrule body. By setting the distance between a boundary point at which the bare optical fiber is fixed at the rear end of the ferrule body and a next point at which the bare optical fiber is fixed to a fixing member which is formed integrally with the ferrule body via a coating of an optical fiber core to the range of 0.5 to 6 mm, more preferably, to the range of 1 to 4 mm, stress concentration at the boundary point at which the bare optical fiber is bonded and the point at which the optical fiber core is fixed cab be reduced.

Optical fiber ferrule assembly and optical module and optical connector using the same

An optical attenuator includes a holding sleeve, a pair of ferrules inserted into and fixed to the holding sleeve such that the ferrules oppose each other at base ends thereof at a predetermined distance between each base end, and an attenuating fiber inserted into and fixed to the pair of ferrules such that ends of the attenuating fiber are exposed. The optical attenuator is also provided with an opening in the holding sleeve so as to communicate with the outside. A filler is supplied into the sleeve through the opening.

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Soka, Japan

Tsuguo Sato