Optical filter having coupled whispering-gallery-mode resonators
First Claim
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1. A device, comprising:
- first and second optical resonators each configured to support whispering gallery modes, wherein said first and said second optical resonators are optically coupled to allow for light coupling from a first whispering gallery mode in said first optical resonator to a second whispering gallery mode in said second optical resonator, and wherein at least one of said first and said second optical resonators is tunable in response to a control signal to change a property of an optical signal passing through said first and said second optical resonators.
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Abstract
Optical filters having at least two coupled whispering-gallery-mode (WGM) optical resonators to produce a second order or higher order filter function with a desired spectral profile. At least one of the coupled WGM optical resonators may be tunable by a control signal to adjust the filtering function.
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Citations
23 Claims
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1. A device, comprising:
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first and second optical resonators each configured to support whispering gallery modes, wherein said first and said second optical resonators are optically coupled to allow for light coupling from a first whispering gallery mode in said first optical resonator to a second whispering gallery mode in said second optical resonator, and wherein at least one of said first and said second optical resonators is tunable in response to a control signal to change a property of an optical signal passing through said first and said second optical resonators. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A method, comprising:
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optically coupling first and second optical resonators via evanescent fields, each optical resonator supporting whispering gallery modes, at least one of the first and the second optical resonators being dynamically tunable to change optical transmission in response to a control signal; and
changing the control signal to adjust optical transmission through both said first and second optical resonators. - View Dependent Claims (21, 22)
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23. A device, comprising:
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first and second optical resonators each configured to support whispering gallery modes, wherein said first and said second optical resonators are optically coupled to allow for light coupling from a first whispering gallery mode in said first optical resonator to a second whispering gallery mode in said second optical resonator, and wherein said first optical resonator is made of an electrooptic material to be tunable in response to a control signal to change a property of an optical signal passing through said first and said second optical resonators, and wherein said second optical resonator is made of a radiation-sensitive material that changes a refractive index when exposed to sensitizing light at a sensitizing wavelength.
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Specification