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4 August 2003 Path-length control in an interferometric QKD link
Brig B. Elliott, Oleksiy Pikalo, John Schlafer, Greg Troxel
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Proceedings Volume 5105, Quantum Information and Computation; (2003) https://doi.org/10.1117/12.487541
Event: AeroSense 2003, 2003, Orlando, Florida, United States
Abstract
We describe a phase-encoded quantum key distribution system the uses continuous control of receiver-interferometer path length to maintain alignment with the transmitter. In this fiber-based system, a small number of training frames are sent over the quantum channel that allow the receiver to compensate for drift in the transmitter and receiver interferometers due to slow changes in temperature. The system is self-starting after disruption and can maintain a quantum bit error rate of less than 7% for phase drift rates of 0.5 deg/sec. The control system design is described and measured system data is compared with simulations.
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Brig B. Elliott, Oleksiy Pikalo, John Schlafer, and Greg Troxel "Path-length control in an interferometric QKD link", Proc. SPIE 5105, Quantum Information and Computation, (4 August 2003); https://doi.org/10.1117/12.487541
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Cited by 12 scholarly publications and 1 patent.
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KEYWORDS
Error analysis
Interferometers
Quantum communications
Quantum key distribution
Phase shifts
Control systems
Sensors
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