Optical waveguide circulator

Details Optical waveguide circulator Optical waveguide circulator

1997-06-03

1999-03-16

Lee, John D.

Optical waveguides

With optical coupler

Particular coupling structure

385 27, 385 32, 385 45, 385 46, G02B 610, G02B 626

Patent

active

058839917

ABSTRACT:
There are provided a first optical waveguide having a first curved portion, a second optical waveguide having a second curved portion that extends along and is disposed inside the first curved portion, a third optical waveguide having a third curved portion, an end portion of the third curved portion being connected to both end portions of the first and second curved portions. Further provided are light output means disposed at an end portion of the first optical waveguide which is opposite the end portion of the first curved portion, for receiving light outputted from the first optical waveguide, light input means disposed at an end portion of the second optical waveguide which is opposite the end portion of the second curved portion, for introducing light into the second optical waveguide, light input/output means disposed at an end portion of the third optical waveguide which is opposite to the end portion of the third curved portion, for introducing light into the third optical waveguide and for receiving light outputted from the third optical waveguide. This optical waveguide circulator is suitable for miniaturization and is also suitable for mass production because it does not require any expensive individual parts.

REFERENCES:
patent: 4378951 (1983-04-01), Nago
patent: 4482202 (1984-11-01), Nagao
patent: 4859014 (1989-08-01), Schmitt et al.
patent: 4978189 (1990-12-01), Blonder et al.
patent: 5018814 (1991-05-01), Jannson et al.
patent: 5400418 (1995-03-01), Pearson et al.
patent: 5574596 (1996-11-01), Cheng
"Verification of Waveguide-Type Optical Circulator Operation", Electronics Letters, vol. 26, No. 3, pp. 199-200, Feb. 1990.

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