[CThA7E] Quantum Communication and Quantum Information Processing

[CThA7E-03] 20-GHz quantum key distribution using Mach-Zehnder intensity modulation and low jitter superconducting single photon detectors

*Atsushi Taniguchi¹, Yasuyuki Sanari¹, Hirokazu Takahashi¹, Kazuaki Obana¹, Hideki Nishizawa¹, Koichi Takasugi¹, Hsin-Pin Lo², Takuya Ikuta², Toshimori Honjo², Hiroki Takesue² (1. NTT Network Innovation Labs., NTT Corp. (Japan), 2. NTT Basic Research Labs., NTT Corp. (Japan))

[Presentation Style] Onsite

We report the first 20-GHz clocked QKD using Mach-Zehnder intensity modulation and low jitter superconducting single photon detectors. A 41.8 kbps secure key rate was achieved with 23 dB channel loss by optical attenuation.