Resources Contact Us Home
Active stabilization of a one-way QKD system

Image Number 13 for United States Patent #7587049.

A one-way stabilized QKD system (10) that utilizes a control signal (CS) and a quantum signal (QS) that travel the same path through the system from a first QKD station (Alice) to a second QKD station (Bob). The control signal is detected at Bob and used to stabilize Bob's side of the interferometer against phase variations. The system also includes a polarization control stage (200) that controls (e.g., scrambles) the polarization of the photons entering Bob. The combination of the polarization control and the active phase stabilization of the interferometer at Bob's end allows for the stable operation of the interferometer when used as part of a one-way QKD system.

  Recently Added Patents
System and method for a driver circuit with a referenced control signal
Author signatures for legal purposes
Memory with separate read and write paths
Power supply device
Prioritizing application data for transmission in a wireless user device
Direct mode adapter based shortcut for FCoE data transfer
Semiconductor device and method of manufacturing the same
  Randomly Featured Patents
Apparatus for a tangible interface
Voltage stable positive temperature coefficient of resistance crosslinked compositions
Hierarchical data collection network supporting packetized voice communications among wireless terminals and telephones
High resolution image source
Lock arm protection structure for connectors
Holder for an abrasive surface
Address transition detection in a synchronous design
High density LSI package for logic circuits
Thermal imaging measurement of lateral diffusivity and non-invasive material defect detection
Method for accessing a non-volatile memory via a volatile memory interface