[6a-PA4-1~6] 3.10 Optical quantum physics and technologies

[6a-PA4-1] Requirement for Modulation Accuracy in IM/DD-QKD

〇Naoki Yamamori¹, Kyo Inoue¹ (1.Osaka Univ.)

Keywords:quantum cryptography, quantum key distribution, intensity modulation quantum key distribution

We have studied intensity modulation and direct detection quantum key distribution (IM/DD-QKD). In which, slightly binary intensity-modulated pulses are sent from a transmitter, and a receiver creates key bits from the directly detected intensity. We previously evaluated the system performance of this scheme assuming an ideal transmitter. However, a practical transmitter has limited modulation accuracy. This study evaluates the dependence of the IM/DD-QKD system performance on the modulation accuracy.