Method and device for synchronizing high-speed quantum key generation system
US11212012B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 5, 2019 |
| Grant date | Dec 28, 2021 |
| Priority date | — |
| Expiry date | Dec 5, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L9/12
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
The present application provides a method and a device for synchronizing a high-speed quantum key generation system, wherein the method comprises: a sender aligns first light pulse of signal light with that of synchronization light, and controls the signal light not to emit light during N consecutive periods within each period Tt of the synchronization light; a receiver performs time measurement on received signal light pulse, the signal light emits light at the remaining corresponding positions except the N consecutive non-emitting positions in each period Tt, the emitting positions can join the statistical process of T1i and T2i, the statistical time is reduced by several orders of magnitude relative to the existing method of only sending single signal light pulse, and the statistical process can be completed in a few hundred milliseconds or even shorter. Therefore, the method of the present application has the features of low hardware processor consumption and short statistical time, can obviously improve the time consumption required in the system synchronization process and reduce the time required for establishing links of a communication system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.