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US 12,769,159 B2Granted
Balun-based differential optical modulator
AssigneeHyperLight Corporation
InventorsLingfei Zhao, Jeffrey Cole Holzgrafe, Christian Reimer, Mian Zhang, Sean P. Anderson
Life of this patent
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Abstract
A photonics device is described. The photonics device includes an optical device and a balun. The optical device includes a waveguide and a signal electrode. The waveguide includes a lithium-containing electro-optic material. The signal electrode varies the electric field at the waveguide. The balun is configured to convert a differential input signal to a single-ended output signal. The balun is connected to the signal electrode and provides the signal electrode with the single-ended output signal.
Claims17
A photonics device, comprising:
- an optical device including:
- a waveguide including a lithium-containing electro-optic material;
- and
- a signal electrode that varies an electric field at the waveguide;
- a balun configured to convert a differential input signal to a single-ended output signal, the balun being connected to the signal electrode and providing the signal electrode with the single-ended output signal, the differential input signal including a positive signal and a negative signal, the balun further including:
- a first input configured to receive the positive signal;
- a second input configured to receive the negative signal;
- a first output coupled to the signal electrode and providing the positive signal to the signal electrode;
- and
- a second output coupled with a plurality of ground electrodes of the optical device, the second output providing the negative signal to the plurality of ground electrodes.
7 more elements
A photonics integrated circuit (PIC), comprising:
- an optical modulator including:
- a waveguide including a lithium-containing electro-optic material;
- and
- a signal electrode that varies an electric field for the waveguide, the optical modulator being a traveling wave modulator;
- and
- a balun having a plurality of inputs and being configured to convert a differential input signal to a single-ended output signal, the balun receiving the differential input signal at the plurality of inputs, being connected to the signal electrode, and providing the signal electrode with the single-ended output signal, the differential input signal including a positive signal and a negative signal, the plurality of inputs receiving the positive signal and the negative signal, the balun further including:
- a first output coupled to the signal electrode and providing the positive signal to the signal electrode;
- and
- a second output coupled with a plurality of ground electrodes of the optical modulator, the second output providing the negative signal to the plurality of ground electrodes.
6 more elements
A method, comprising:
- providing an optical device including a waveguide and a signal electrode, the waveguide including a lithium-containing electro-optic material;
- and
- providing a balun configured to convert a differential input signal to a single-ended output signal, the balun being connected to the signal electrode and providing the signal electrode with the single-ended output signal, the differential input signal including a positive signal and a negative signal, the balun further including a first input configured to receive the positive signal, a second input configured to receive the negative signal, a first output coupled to the signal electrode and providing the positive signal to the signal electrode, and a second output coupled with a plurality of ground electrodes of the optical device, the second output providing the negative signal to the plurality of ground electrodes, wherein the providing the balun further includes:
- providing a first metallization layer including the signal electrode, the first input, the second input, and the plurality of ground electrodes;
- providing a plurality of conductive vias for the signal electrode and the first output;
- and
- providing a second metallization layer coupling the first output with the signal electrode through the plurality of conductive vias.
4 more elements
Dependencies are inferred from the claim text.