Quantum key distribution device capable of being configured with multiple protocols
US11522689B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 26, 2022 |
| Grant date | Dec 6, 2022 |
| Priority date | — |
| Expiry date | Jan 26, 2042 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/70
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
The present invention relates to the field of quantum communication, especially a quantum key distribution device that can be configured with multiple protocols. It uses the simplified Faraday-Michelson interference ring in combination with the intensity modulator to perform timestamp encoding in a chopping manner. The phase modulation is completed with a Sagnac ring device composed of a single-polarization phase modulator, a polarization beam splitter and a Faraday rotator, so as to achieve the purpose of composite encoding and decoding, thus realizing a quantum key distribution device which can be configured with multiple protocols and multiple decoy state schemes. This device can be compatible with multiple protocols including BB84 protocol, the reference frame-independent protocol, the six-state protocol and SARG protocol and is characterized with polarization-independent phase modulation and low system complexity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.