POLARIZATION CODING QUANTUM CRYPTOGRAPHY SYSTEM

摘要

PURPOSE: A polarization coding quantum cryptography system is provided to secure stable motion characteristics. CONSTITUTION: A light source(100) generates a signal beam. A quantum channel is used as the path of transmitting the signal beam to a receiver. A light path selecting device(200) is arranged between the light source and quantum channel. The light path selecting device transmits the signal beam to one among a plurality of movement path. A path dependence polarization selection unit(300) is arranged between the light path selecting device and quantum channel.