Wavelength-tunable optical ring resonators
First Claim
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1. An optical ring resonator apparatus, comprising:
- an optical waveguide ring having a width which adiabatically varies with distance around the optical waveguide ring between a minimum value and a maximum value;
at least one connecting member in contact with the optical waveguide ring at a location proximate to the maximum value of the width of the optical waveguide ring; and
an optical waveguide located near the optical waveguide ring at a location proximate to the minimum value of the width of the optical waveguide ring to couple light between the optical waveguide and the optical waveguide ring.
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Abstract
Optical ring resonator devices are disclosed that can be used for optical filtering, modulation or switching, or for use as photodetectors or sensors. These devices can be formed as microdisk ring resonators, or as open-ring resonators with an optical waveguide having a width that varies adiabatically. Electrical and mechanical connections to the open-ring resonators are made near a maximum width of the optical waveguide to minimize losses and thereby provide a high resonator Q. The ring resonators can be tuned using an integral electrical heater, or an integral semiconductor junction.
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Citations
21 Claims
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1. An optical ring resonator apparatus, comprising:
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an optical waveguide ring having a width which adiabatically varies with distance around the optical waveguide ring between a minimum value and a maximum value; at least one connecting member in contact with the optical waveguide ring at a location proximate to the maximum value of the width of the optical waveguide ring; and an optical waveguide located near the optical waveguide ring at a location proximate to the minimum value of the width of the optical waveguide ring to couple light between the optical waveguide and the optical waveguide ring. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An optical ring resonator apparatus, comprising:
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at least one optical ring resonator supported on a substrate, with each optical ring resonator having a width which adiabatically varies with distance around that optical ring resonator between a minimum value and a maximum value of the width; a pair of electrical contacts located inside of each optical ring resonator, with the pair of electrical contacts being connected to that optical ring resonator at a location proximate to the maximum value of the width thereof; and at least one optical waveguide supported on the substrate outside of the at least one optical ring resonator at a location proximate to the minimum value of the width of the optical ring resonator. - View Dependent Claims (11, 12, 13, 14)
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15. An optical ring resonator apparatus, comprising:
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a substrate; at least one optical waveguide supported on the substrate; an optical ring resonator located adjacent to each optical waveguide to couple light therebetween at a resonant frequency of the optical ring resonator, with the optical ring resonator having a width which adiabatically varies with distance around the optical ring resonator between a minimum value and a maximum value of the width; at least one impurity-doped region located within the optical ring resonator at a location proximate to the maximum value of the width of the optical ring resonator; and a pair of electrical contacts located inside of the optical ring resonator and connected to the at least one impurity-doped region to provide a voltage thereto to vary the resonant frequency of the optical ring resonator. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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Specification