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
Dye-sensitized solar cell, dye-sensitized solar cell module, and coating liquid for forming electrolyte layer
Listing recommendation using generation of a user-specific query in a network-based commerce system
Touchscreen with extended conductive pattern
Inverter, NAND gate, and NOR gate
Method and device for accessing the documentation of an aircraft according to alarms generated therein
Semiconductor device including multi-chip
Toner cartridge
  Randomly Featured Patents
Air ring for the production of blown film
Process for making pictorial reproductions
Chell-and-tube heat exchanger for heating viscous fluids
Warp-stitched multilayer papermaker's fabrics
Removal of gaseous hydrides
Pistol cocking assistive device
Mesh network remote control device
Utility box insert
Movable barrier operator and transmitter with imminent barrier moving notification
Lactic acid processing; methods; arrangements; and, product