Optical waveguides – With optical coupler – Particular coupling structure
Patent
1992-06-02
1994-07-12
Lee, John D.
Optical waveguides
With optical coupler
Particular coupling structure
25022724, 356 731, 385 15, G02B 626
Patent
active
053296001
ABSTRACT:
In an optical fiber coupler fabricating process where couplers are successively formed by heating, elongating and cutting a plurality of long optical fibers, light is led into the first end of the fiber, reflected at the second end of the coupler, and the reflected light is monitored by photodetectors. In this manner, an exact splitting ratio can be obtained. Techniques for minimizing measuring errors caused by the inter-reflected-light interference, the inter-Rayleigh-scattering-light interference, and the interference between the reflected light and the Rayleigh scattering light, while exploiting the advantageous feature of the reflection monitor method that the fiber connection work for each fiber coupler fabrication is not required are disclosed.
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Arimoto Kazuhiko
Fukuma Masumi
Sasaoka Eisuke
Suganuma Hiroshi
Takimoto Hiroaki
Lee John D.
Sumiden Opcom Ltd.
Sumitomo Electric Industries Ltd.
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