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US 11,803,098 B2Granted
High-brightness quantum source based on multi-wavelength combination via arrayed Type-0 ppKTP crystal and method of generating entangled photon pairs
AssigneeAgency for Defense Development
InventorsYong Sup Ihn, Dongkyu Kim, Kyungdeuk Park, Dohoon Lim
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Abstract
A quantum source includes: a quantum source generator dividing a pump beam into a plurality of channels and generating a plurality of signals and a plurality of idlers using nonlinear crystals respectively located optical paths of the plurality of channels; and an entangled photon pair combiner outputting an enhanced signal by combining the plurality of signals and outputting an enhanced idler by combining the plurality of idlers.
Claims15
A quantum source comprising:
- a quantum source generator dividing a pump beam into a plurality of channels and generating a plurality of signals and a plurality of idlers using nonlinear crystals respectively located optical paths of the plurality of channels;
- and
- an entangled photon pair combiner outputting an enhanced signal by combining the plurality of signals and outputting an enhanced idler by combining the plurality of idlers,
- wherein as the respective nonlinear crystals of the plurality of channels are adjusted to different temperatures, the plurality of signals have different wavelengths and the plurality of idlers have different wavelengths.
1 more element
A quantum source comprising:
- a first channel unit including a first nonlinear crystal controlled to have a first temperature and generating a signal and an idler of a first channel by injecting a pump beam to the first nonlinear crystal;
- a second channel unit including a second nonlinear crystal controlled to have a second temperature and generating a signal and an idler of a second channel by injecting a pump beam to the second nonlinear crystal;
- a signal combiner combining the signal of the first channel and the signal of the second channel;
- and
- an idler combiner combining the idler of the first channel and the idler of the second channel.
2 more elements
A method of generating entangled photon pairs, the method comprising:
- dividing a pump beam into a plurality of channels;
- adjusting nonlinear crystals respectively located in optical paths of the plurality of channels to different temperatures;
- separating signals and idlers for each of a plurality of channels from photon pairs generated by the nonlinear crystals respectively located in the plurality of channels;
- and
- generating an enhanced signal by combining the signals for each of the plurality of channels, and generating an enhanced idler by combining the idlers for each of the plurality of channels.
2 more elements
Dependencies are inferred from the claim text.