Title :
Experimental Demonstration of a Detection-Time-Bin-Shift Polarization Encoding Quantum Key Distribution System
Author :
Ma, Lijun ; Chang, Tiejun ; Mink, Alan ; Slattery, Oliver ; Hershman, Barry ; Tang, Xiao
Author_Institution :
Adv. Network Technol. Div., Nat. Inst. of Stand. & Technol., Gaithersburg, MD
fDate :
6/1/2008 12:00:00 AM
Abstract :
Detection-time-bin-shift (DTBS) is a scheme that uses time division multiplexing of a single photon detector between two photon bases in a quantum key distribution (QKD) system. This scheme can simplify the structure of a QKD system, reduce its cost and overcome the security problems caused by the dead-time induced self-correlation and the unbalanced characteristics of detectors. In this paper, we introduce an improved DTBS scheme and implement it based on our previously developed conventional fiber-based QKD system using the B92 protocol. Our DTBS QKD system generates sifted keys at a rate of more than 1 Mbit/s with a quantum bit error rate (QBER) lower than 2% over 1.1 km of fiber.
Keywords :
error statistics; quantum cryptography; time division multiplexing; detection-time-bin-shift polarization encoding quantum key distribution system; quantum bit error rate; quantum cryptography; single photon detector; time division multiplexing; Costs; Detectors; Encoding; NIST; Optical coupling; Optical fiber couplers; Optical fiber polarization; Protocols; Security; Vertical cavity surface emitting lasers;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2008.080237
