An experimental quantum cryptography using balanced homodyne detection over a 1 km optical fiber
Ryo Namiki, T. Konishi, H. Yanianaka, T. Mihirogi, Takuya Hirano · 2002
We report an experimental quantum cryptography using balanced homodyne detection over a 1 km optical fiber. In this scheme we can measure the distribution of the quadrature amplitudes of the weak coherent pulse.