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US 11,079,232 B2Granted
Device comprising a ring optical resonator
AssigneeSTMicroelectronics S.r.l.
InventorsAntonio Fincato, Enrico Stefano Temporiti Milani, Maurizio Zuffada, Angelica Simbula
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Abstract
A device includes an optical resonator having four ports including a first port, a second port, a third port, and a fourth port. A first electronic circuit is configured to calculate a first information representative of a power difference between optical signals supplied by two of the four ports. A method of operating a device is also disclosed.
Claims20
A device comprising:
- an optical resonator comprising a first port, a second port, a third port, and a fourth port;
- a first electronic circuit configured to calculate a first information representative of a power difference between a second-port optical signal supplied by the second port and a third-port optical signal supplied by the third port, the second-port optical signal and the third-port optical signal originating from a laser source;
- and
- a second electronic circuit configured to calculate a second information representative of a power difference between a first-port optical signal supplied by the first port and a fourth-port optical signal supplied by the fourth port, the first-port optical signal and the fourth-port optical signal originating from the laser source, the second information being used to control a resonance wavelength of the optical resonator so that the power difference between the first-port optical signal and the fourth-port optical signal is zero at a wavelength of the laser source.
1 more element
A device comprising:
- an optical resonator comprising a first port, a second port, a third port, and a fourth port;
- a laser source linked to the first port and the second port;
- a first electronic circuit configured to calculate a first information representative of a power difference between a second-port optical signal supplied by the second port and a third-port optical signal supplied by the third port, the second-port optical signal and the third-port optical signal originating from the laser source;
- and
- a second electronic circuit configured to calculate a second information representative of a power difference between a first-port optical signal supplied by the first port and a fourth-port optical signal supplied by the fourth port, the first-port optical signal and the fourth-port optical signal originating from the laser source, the second information being used to control a resonance wavelength of the optical resonator so that the power difference between the first-port optical signal and the fourth-port optical signal is zero at a wavelength of the laser source.
2 more elements
A method for determining a rotation speed of a device that includes an optical resonator comprising a first port, a second port, a third port, and a fourth port, the method comprising:
- transmitting an initial optical signal from a laser source to the first port;
- directing a first part of the initial optical signal to the third port via a first ring waveguide to produce a third-port optical signal;
- directing a second part of the initial optical signal to the second port via a second waveguide to produce a second-port optical signal;
- calculating a first information representative of a power difference between the second-port optical signal and the third-port optical signal;
- determining the rotation speed of the device with respect to a central axis of the first ring waveguide based on the first information transmitting a second initial optical signal from the laser source to the second port;
- directing a first part of the second initial optical signal to the fourth port via the first ring waveguide to produce a fourth-port optical signal;
- directing a second part of the second initial optical signal to the first port via the second waveguide to produce a first-port optical signal;
- and
- calculating a second information representative of a power difference between the fourth-port optical signal and the first-port optical signal;
- and
- using the second information to control a resonance wavelength of the optical resonator so that the power difference between the first-port optical signal and the fourth-port optical signal is zero at a wavelength of the laser source.
8 more elements
A device comprising:
- an optical resonator comprising:
- a first port being configured to receive an initial optical signal from a laser source and direct a first part of the initial optical signal to a third port via a first ring waveguide to produce a third-port signal and direct a second part of the initial optical signal to a second port via a second waveguide to produce a second-port signal;
- the second port being configured to receive a second initial optical signal from the laser source and direct a first part of the second initial optical signal to a fourth port via the first ring waveguide to produce a fourth-port signal and direct a second part of the second initial optical signal to the first port via the second waveguide to produce a first-port signal;
- and
- a first electronic circuit configured to calculate a first information representative of a power difference between the second-port signal and the third-port signal and being configured to determine from the first information an angular speed of the optical resonator with respect to a first axis of the first ring waveguide;
- and
- a second electronic circuit configured to calculate a second information representative of a power difference between the first-port signal and the fourth-port signal and being configured to supply a control signal based on the second information to the first ring waveguide to vary a resonance wavelength of the first ring waveguide so that the power difference between the first-port signal and the fourth-port signal is zero at a wavelength of the laser source.
4 more elements
Dependencies are inferred from the claim text.