Voltage controlled tunable single sideband modulators and devices based on electro-optic optical whispering gallery mode resonators
First Claim
Patent Images
1. A device based on a whispering gallery mode optical resonator, comprising:
- a laser that produces continuous wave (CW) laser light at a laser frequency;
an optical resonator structured to include different poled electro-optic domains and to support whispering gallery modes circulating in the optical resonator to effectuate a single sideband (SSB) on only one side of the laser frequency without having a mirror image sideband on the other side of the laser frequency;
an evanescent optical coupler located to couple the laser light from the laser into the optical resonator;
electrodes formed on the optical resonator to include at least one DC bias electrode to receive a DC bias voltage and at lease one RF electrode to receive an RF signal to produce the optical single sideband (SSB); and
a bias control circuit coupled to the DC bias electrode to apply and adjust the DC bias voltage to tune a frequency spacing between the optical single sideband and the laser frequency.
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Abstract
Photonic devices and techniques based on tunable single sideband (SSB) modulation in whispering gallery mode resonators formed of different poled electro-optic domains and to support whispering gallery modes circulating in the optical resonator to effectuate a single sideband (SSB) on only one side of the laser frequency without having a mirror image sideband on the other side of the laser frequency.
113 Citations
16 Claims
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1. A device based on a whispering gallery mode optical resonator, comprising:
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a laser that produces continuous wave (CW) laser light at a laser frequency; an optical resonator structured to include different poled electro-optic domains and to support whispering gallery modes circulating in the optical resonator to effectuate a single sideband (SSB) on only one side of the laser frequency without having a mirror image sideband on the other side of the laser frequency; an evanescent optical coupler located to couple the laser light from the laser into the optical resonator; electrodes formed on the optical resonator to include at least one DC bias electrode to receive a DC bias voltage and at lease one RF electrode to receive an RF signal to produce the optical single sideband (SSB); and a bias control circuit coupled to the DC bias electrode to apply and adjust the DC bias voltage to tune a frequency spacing between the optical single sideband and the laser frequency. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for operating a whispering gallery mode optical resonator, comprising:
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operating a laser to produce continuous wave (CW) laser light at a laser frequency; coupling the laser light into an optical resonator structured to include different poled electro-optic domains and to support whispering gallery modes circulating in the optical resonator to effectuate a single sideband (SSB) on only one side of the laser frequency without having a mirror image sideband on the other side of the laser frequency; applying an RF signal to the optical resonator to produce the optical single sideband (SSB) in the light within the optical resonator; and applying a DC bias voltage to the optical resonator to adjust the DC bias voltage to tune a frequency spacing between the optical single sideband and the laser frequency. - View Dependent Claims (10)
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11. A device based on a whispering gallery mode optical resonator, comprising:
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a laser that produces continuous wave (CW) laser light at a laser frequency; an optical resonator structured to include different poled electro-optic domains and to support whispering gallery modes circulating in the optical resonator to effectuate a single sideband (SSB) on only one side of the laser frequency without having a mirror image sideband on the other side of the laser frequency; a laser locking mechanism that locks the laser to the optical resonator; electrodes formed on the optical resonator to include at least one DC bias electrode to receive a DC bias voltage and at lease one RF electrode to receive a modulation control signal to cause optical modulation in the different poled electro-optic domains to produce the optical single sideband (SSB); an opto-electronic feedback loop that includes an optical part coupled to the optical resonator to receive modulated laser light coupled out of the optical resonator and an electrical part that produces the modulation control signal, and an optical detector coupled between the optical part and the electrical part, the opto-electronic feedback loop feeding the modulation control signal in phase to the RF electrode on the optical resonator; and a bias control circuit coupled to the DC bias electrode to apply and adjust the DC bias voltage to tune a frequency spacing between the optical single sideband and the optical frequency. - View Dependent Claims (12, 13, 14, 15, 16)
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Specification