Optical devices based on optically coupled optical whispering gallery-mode resonators formed on a rod
First Claim
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1. An optical device having an optical whispering gallery mode resonator, comprising:
- an optical resonator that is shaped to include an optical path and supports whispering gallery modes propagating in the optical path and including a selected whispering gallery mode that has a zero electric field at a selected location in the optical path at which electric fields of other whispering gallery modes are not zero; and
an optically absorptive structure formed at the selected location in the optical path of the optical resonator and structured to absorb light of the other whispering gallery modes at the selected location without absorbing light in the selected whispering gallery mode so as to sustain the light in the selected whispering gallery mode as a single optical mode in the optical resonator while suppressing the other whispering gallery modes.
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Abstract
Devices having whispering-gallery-mode (WGM) resonators configured to meet requirements of various applications and facilitate fabrication of such devices.
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Citations
11 Claims
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1. An optical device having an optical whispering gallery mode resonator, comprising:
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an optical resonator that is shaped to include an optical path and supports whispering gallery modes propagating in the optical path and including a selected whispering gallery mode that has a zero electric field at a selected location in the optical path at which electric fields of other whispering gallery modes are not zero; and an optically absorptive structure formed at the selected location in the optical path of the optical resonator and structured to absorb light of the other whispering gallery modes at the selected location without absorbing light in the selected whispering gallery mode so as to sustain the light in the selected whispering gallery mode as a single optical mode in the optical resonator while suppressing the other whispering gallery modes. - View Dependent Claims (2, 3, 4)
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5. A method for maintaining a single optical mode in an optical resonator, comprising:
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providing an optical resonator that is shaped to include an optical path and supports whispering gallery modes propagating in the optical path and including a selected whispering gallery mode that has a zero electric field at a selected location in the optical path at which electric fields of other whispering gallery modes are not zero; and attenuating light at the selected location in the optical path of the optical resonator to suppress light of the other whispering gallery modes at the selected location without attenuating light in the selected whispering gallery mode so as render the selected whispering gallery mode to be a single optical mode present in the optical resonator. - View Dependent Claims (6, 7, 8)
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9. An optical device having an optical whispering gallery mode resonator, comprising:
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an optical resonator that is shaped to include a circular optical path and supports whispering gallery modes propagating in an optical path and including a selected whispering gallery mode that has a zero electric field at a selected location in the optical path at which electric fields of other whispering gallery modes are not zero; and an optical coupler located outside the optical resonator near the selected location in the optical path of the optical resonator to be in evanescently coupling with whispering gallery modes at the selected location to suppress electric fields of other whispering gallery modes at the selected location to render the selected whispering gallery mode to be a single optical mode present in the optical resonator. - View Dependent Claims (10, 11)
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Specification