Optical waveguide coupler

Details Optical waveguide coupler Optical waveguide coupler

2005-03-29

2005-03-29

Bovernick, Rodney (Department: 2874)

Optical waveguides

With optical coupler

Particular coupling structure

C385S015000, C385S030000

Reexamination Certificate

active

06873769

ABSTRACT:
An optical waveguide coupler relaxes a phase matching condition and facilitates coupling between an optical waveguide and a resonator. Light in a multimode optical waveguide is coupled directly to a microsphere resonator via evanescent light. Under a nonresonance condition, influence of the microsphere resonator is small, and light propagation through the multimode optical waveguide is not influenced. However, since the intensity of the light stored in the microsphere resonator is high under the resonance condition, even if the coupling efficiency is low, the microsphere resonator outputs light of approximately the same power as that of the light in the multimode optical waveguide. Therefore, a strong coupling condition is always satisfied, and the optical waveguide coupler functions as a filter due to the interference between the light in the multimode optical waveguide and the light that has passed through the microsphere resonator.

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H. Ishikawa et al.: “Observation of a modulation effect caused by a microsphere resonator strongly coupled to a dielectric substrate” Optics Letters, vol. 24, No. 10, pp. 643-645 05/99.

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