Quantum key distribution system
US11700115B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 8, 2022 |
| Grant date | Jul 11, 2023 |
| Priority date | — |
| Expiry date | Jun 8, 2042 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/70
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An optical transmitter for quantum key distribution includes a plurality of spatially separated light sources configured to emit a light signal with the same wavelength. Each light source emits a light signal with a unique encoding. A beam combiner receives the light signals from the plurality of light sources and combines the received light signals into a combined light signal. A spatial filter is optically coupled to the beam combiner and includes an aperture that receives the combined light signal and emits a filtered light signal. The aperture has an aperture diameter less than or equal to the specified wavelength. A collimator is optically coupled to the spatial filter and receives the filtered light signal and emits a collimated light signal. An output aperture receives the collimated light signal and outputs the collimated light signal as an output light signal towards an optical receiver.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.