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Patent US10379420
Issued 2019-08-13
Clock Generation For A Photonic Quantum Computer To Convert Electrical Pulses Into A Plurality Of Clock Signals
A system for generating clock signals for a photonic quantum computing system includes a pump photon source configured to generate a plurality of pump photon pulses at a first repetition rate, a waveguide optically coupled to the pump photon source, and a photon-pair source optically coupled to the first waveguide. The system also includes a photodetector optically coupled to the photon-pair source and configured to generate a plurality of electrical pulses in response to detection of at least a portion of the plurality of pump photon pulses at the first repetition rate and a clock generator coupled to the photodetector and configured to convert the plurality of electrical pulses into a plurality of clock signals at the first repetition rate.
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- 1. A system for generating clock signals for a photonic quantum computing system disposed inside a cryostat, the system comprising:
a pump photon source disposed outside the cryostat, the pump photon source configured to generate a plurality of pump photon pulses at a first repetition rate; a waveguide optically coupled to the pump photon source; a photon-pair source disposed inside the cryostat and optically coupled to the waveguide, the photon-pair source configured to: receive the plurality of pump photon pulses via the waveguide; convert a first portion of each of a subset of the plurality of pump photon pulses into a photon pair; output the photon pairs converted from the subset of the plurality of pump photon pulses; and output a second portion of each pump photon pulse of the plurality of pump photon pulses; a photodetector disposed inside the cryostat and configured to: receive the second portion of each pump photon pulse of the plurality of pump photon pulses; and generate a plurality of electrical pulses by converting the second portion of each pump photon pulse of the plurality of pump photon pulses into a respective electrical pulse of the plurality of electrical pulses; and a clock generator disposed inside the cryostat and electrically coupled to the photodetector, the clock generator configured to convert the plurality of electrical pulses generated by the photodetector into a plurality of clock signals at the first repetition rate.
- 4. A system for generating clock signals for a photonic quantum computing system, the system comprising:
a pump photon source configured to generate a plurality of pump photon pulses at a first repetition rate; a waveguide optically coupled to the pump photon source; a photon-pair source optically coupled to the waveguide; a photodetector optically coupled to the photon-pair source and configured to generate a plurality of electrical pulses in response to detection of at least a portion of the plurality of pump photon pulses at the first repetition rate; and a clock generator coupled to the photodetector and configured to convert the plurality of electrical pulses into a plurality of clock signals at the first repetition rate.
