Emulation of up-conversion based quantum key distribution scheme using active pump-controlled basis selection and adaptive thresholding

OPTICS COMMUNICATIONS

卷:475

Article

Lee, Kim F.¹  Reilly, Daniel R.¹  Moraw, Paul¹  Kanter, Gregory S.¹ 

[1] NuCrypt LLC, Evanston, IL 60201 USA

关键词: Quantum key distribution;    Differential-phase-shift QKD;    Free space optical communications;    Single photon detector;   

DOI  :  10.1016/j.optcom.2020.126258

来源: Elsevier

【 摘 要 】

We emulate a method for quantum key distribution (QKD) that employs up-conversion detection. The scheme uses differential quadrature phase shift modulation and actively chooses the measurement basis by applying a dynamic phase-shift on the pump of the up-conversion interaction. The QKD rate of the quantum-hacking resistant system over an emulated 7.5 km marine-like turbulent channel is evaluated including the impact of thresholding the received data so as to ignore signals that are below a tolerable signal-to-noise ratio. The emulated system is well suited to operate over marine free space optical links coupled to single mode fiber.

【 授权许可】

Free