High speed optical receiver system
AssigneeTaiwan Semiconductor Manufacturing Company, Ltd.
InventorsChih-Tsung Shih, Chia-Ming Hung, Chi-Yuan Shih
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Abstract
Some implementations described herein provide an optical receiver system. The optical receiver system includes optical circuitry that may include a phase shifter device, a demultiplexer device, a power combiner device, and/or a power splitter device. Different combinations of such devices within the optical circuitry may balance and/or reduce photocurrents within the photodiode device to improve a performance (e.g., a bandwidth) of the optical receiver system relative to another optical receiver system that does not include the optical circuitry.
Claims20
An optical receiver system, comprising:
- a first phase shifter configured to receive first incident light;
- a second phase shifter configured to receive second incident light;
- a demultiplexer coupled with a first output of the first phase shifter and a second output of the second phase shifter;
- a first power splitter, coupled with the first output of the first phase shifter, having a first controllable power splitting ratio;
- and
- a second power splitter, coupled with the second output of the first phase shifter, having a second controllable power splitting ratio;
- and
- a photodiode coupled with the first power splitter and the second power splitter.
An optical receiver system, comprising:
- a demultiplexer;
- a phase shifter coupled with the demultiplexer;
- a power combiner, wherein:
- at least one input of the demultiplexer connects with an output of a two-dimensional grating coupler, and
- at least one input of the phase shifter connects with an output of the demultiplexer, and
- at least one input of the power combiner connects with an output of the phase shifter;
- a power splitter, wherein at least one input of the power splitter connects with an output of the power combiner;
- and
- a photodiode coupled with the power splitter.
A method, comprising:
- receiving, by an optical circuit between a two-dimensional grating coupler and a photodiode, first incident light and second incident light, wherein the first incident light and the second incident light include light waves of multiple wavelengths;
- transmitting the first incident light and the second incident light through respective phase shifters;
- transmitting outputs from the respective phase shifters to a demultiplexer;
- transmitting an output of a first wavelength from the demultiplexer through a first power splitter having a first controllable power splitting ratio;
- transmitting an output of a second wavelength from the demultiplexer through a second power splitter having a second controllable power splitting ratio;
- providing, by the photodiode to a transimpedance amplifier, electrical currents based on respective time-fixed photocurrents;
- and
- converting, by the transimpedance amplifier, the electrical currents to an output voltage that is used by an optical communication system.
Dependencies are inferred from the claim text.