Two-way QKD system with active compensation
US7606371B2 · kind B2 · utility
3Cited by
7References
16Claims
0Family size
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Key dates
| Filing date | Jun 25, 2004 |
| Grant date | Oct 20, 2009 |
| Priority date | — |
| Expiry date | Aug 14, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L9/0852
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A two-way actively stabilized QKD system that utilizes control signals and quantum signals is disclosed. Because the quantum signals do not traverse the same optical path through the system, signal collisions in the phase modulator are avoided. This allows the system to have a higher transmission rate than a two-way system in which the quantum signals traverse the same optical path. Also, the active stabilization process, which is based on maintaining a fixed relationship between an intensity ratio of interfered control signals, is greatly simplified by having the interferometer loops located all in one QKD station.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.