Polarization states encoded by phase modulation for high bit rate quantum key distribution

摘要

We present implementation of quantum cryptography with polarization code by wave-guide type phase modulator. At four different low input voltages of the phase modulator, coder encodes pulses into four different polarization states, 45 degrees, 135 degrees linearly polarized or right, left circle polarized, while the decoder serves as the complementary polarizers. (c) 2006 Elsevier B.V. All rights reserved.