Optical fiber junction devices

Details Optical fiber junction devices Optical fiber junction devices

G - Physics

02

B

88/97.34

G02B 6/36 (2006.01) G02B 6/26 (2006.01) G02B 6/38 (2006.01) G02B 6/44 (2006.01)

Patent

CA 1267801

OPTICAL FIBER JUNCTION DEVICES Abstract of the Disclosure A pair of optical fiber terminating members or plugs, each comprising a precision ground frusto-conical plastic body are inserted into a precision molded seating member having correspondingly shaped frusto-conical recesses, the recesses opposed and coaxial. A transmission path is formed between optical fibers terminated at the plugs. The cores of fibers terminated at the plugs are offset from the longitudinal axes of respective plugs. By relatively rotating the plugs about their longitudinal axes, light transmission between a fiber or fibers in one plug and a fiber or fibers in the other plug is varied. The device is implemented as a variable attenuator, as a switch or as a connector. A fiber is positioned within such a plug by forming a passage along the plug, the passage diameter being larger than the diameter of a fiber to be terminated and the passage having a curve along its length. This curve ensures that the resilient fiber, when fed into the passage locates at a particular angular position at which the fiber end is precisely offset from the plug axis. The fiber is fixed in position using an epoxy resin.

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