Characterization of a single-photon detector at 1.55 ㎛ operated with an active hold-off technique for quantum key distribution
- Characterization of a single-photon detector at 1.55 ㎛ operated with an active hold-off technique for quantum key distribution
- 보우지드; Jun-Bum Park; 김세민; Sean Kwak; 문성욱
- Avalanche photodiode; Single-photon detector; Quantum key distribution; Raw key creation rate; Quantum bit error rate
- Issue Date
- Current applied physics
- VOL 11, NO 3, 903-908
- To better understand how the active hold-off technique in single-photon detectors (SPDs) based on
InGaAs/InP avalanche photodiodes (APDs) enhances the performance of a quantum key distribution
(QKD) system based on the BB84 protocol, we have evaluated the dependence of the raw key creation
rate (Rraw) as well as the quantum bit error rate (QBER) on the number of active hold-off gates. The
results of our analysis reveal that at 10 MHz repetition rate of the gate, by holding-off 200 gate pulses
immediately following an avalanche event, the afterpulse contribution to the QBER drops down to 2.35%
without noticeable decrease in the Rraw.
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