POLARIZATION-INSENSITIVE ONE WAY QUANTUM KEY RECEIVER, TRANSMITTER/RECEIVER SYSTEM

摘要

The present invention relates to a quantum cryptography receiving and transmitting and receiving apparatus, the interferometer and the polarization fluctuation of the optical pulse signal relates to the quantum cryptography receiving and transmitting and receiving apparatus for generating a high speed by the quantum cryptography key without the phase fluctuation. The quantum cryptography receiving apparatus according to the invention for this purpose receives the optical pulse signal, the polarization-independent optical phase modulator for modulating the phase of the optical pulses to the output signal without being affected by the state of polarization of the optical pulse signal; An asymmetric Mach-Zehnder (Mach-Zehnder) interferometer for the polarization-independent optical phase modulator outputs the interference signals from the received optical pulse portion; And a photon detector for detecting the received optical pulse signal from the asymmetric MZI. Thereby, there is an advantage to the polarization fluctuation and the quantum cryptography communication at a high speed without being affected by the phase fluctuation of the interferometer of the optical pulse signal.