Quantum key distribution at 1550 nm using a pulse heralded single photon source
Alexandre Soujaeff, Tsuyoshi Nishioka, Toshio Hasegawa, Shigeki Takeuchi, Toyohiro Tsurumaru, Keiji Sasaki, Mitsuru Matsui · Optics Express · 2007
Quantum key distribution with pulsed heralded single photon source was performed over 40 km of fiber for the first time to our knowledge. QBER was measured to be 4.23% suggesting security against unconditional attack.