Optical non-reciprocal circuit of waveguide type

Details Optical non-reciprocal circuit of waveguide type Optical non-reciprocal circuit of waveguide type

1994-08-09

1995-06-27

Healy, Brian

Optical waveguides

Integrated optical circuit

385 6, 385 11, 385 37, 385 39, 385 50, 385131, 385132, G02B 612, G02B 610

Patent

active

054286956

ABSTRACT:
An optical non-reciprocal circuit is constituted by a channel waveguide, a planar waveguide, and a diffraction lattice or grating. The channel waveguide is disposed in a planar substrate that is transmissive to optical waves. The planar waveguide is disposed on only one side of a substrate plane divided by the channel waveguide in the substrate plane and having an equivalent refractive index lower than that in the channel waveguide. The diffraction grating provides a spatial periodic change of the refractive index to a guided optical wave of the channel waveguide. The periodicity of the lattice direction, that is, the direction of the wavenumber vector is neither parallel nor perpendicular to the optical transmission direction of the channel waveguide but is given a finite angle. The optical non-reciprocal circuit can be realized by using only an ordinary dielectric material with the circuit being highly productive and low priced and having high performance.

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S. T. Peng et al., "Directional Blazing of Waves Guided by Asymmetrical Dielectric Gratings", Optics Communications, vol. 11, No. 4, Aug. 1974, pp. 405-409.

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