Method and apparatus for correcting polarization distortion of faraday rotating mirror in plug-and-play quantum key distribution system
US12284273B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 11, 2020 |
| Grant date | Apr 22, 2025 |
| Priority date | — |
| Expiry date | Feb 21, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W12/0431
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Provided is a method and device for correcting an error in a communication system, the method including: transmitting, to another device, data encrypted based on key information. The key information is obtained by: incident a detection pulse on a variable Faraday rotating mirror and a reference pulse on a first mirror, respectively, wherein the detection pulse and the reference pulse are pulses branched from a test pulse; generating a first current in a balanced photodetector (BPD) based on a first component obtained as the detection pulse is reflected from the variable Faraday rotating mirror and a second component obtained as the reference pulse is reflected from the first mirror; converting the first current into a second current; incident the second current on the variable Faraday rotating mirror; and correcting the error in the variable Faraday rotating mirror based on the incident second current.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.