Optical waveguides – With optical coupler – Particular coupling structure
Patent
1991-11-27
1992-12-08
Lee, John D.
Optical waveguides
With optical coupler
Particular coupling structure
385 24, 385 42, 359127, G02B 628
Patent
active
051704510
ABSTRACT:
In an optical coupler of this invention, second and third single mode optical fibers are arranged to be parallel with each other with a first single mode optical fiber intervening therebetween, and a region in which the second and third optical fibers are linearly symmetrical with each other about the first optical fiber as the center is distribution-coupled. The coupling length of distributed coupling is set such that when the first and second light waves having a wavelength .lambda.1 and a wavelength .lambda.2 different from the wavelength .lambda.1 are incident on one port of the first optical fiber, the first light wave is emitted from the other port of the first optical fiber and the second light wave is emitted from the second and third optical fibers.
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Heartney Phan T.
Kabushiki Kaisha Toshiba
Lee John D.
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