Two-photon Comb with Wavelength Conversion for Long-distance Quantum Communication
Kazuya Niizeki, Daisuke Yoshida, Ko Ito, Ippei Nakamura, Nobuyuki Takei, Kotaro Okamura, Mingyang Zheng, Xiu-Ping Xie, Tomoyuki Horikiri · 2020
We demonstrate two-photon comb (TPC) technique and wavelength conversion. TPC consists of telecom entangled photon pairs with narrow linewidth and two-photon coincidence after conversion was observed. 20-km distribution was also achieved aiming at quantum internet.