Integrated waveguide polarization orthogonal rotation reflection device and quantum key distribution system

Abstract

The invention provides an integrated waveguide polarization orthogonal rotation reflection device and a quantum key distribution system. The apparatus comprises: an apparatus body; the invention discloses an integrated waveguide polarization beam splitting rotating device, wherein the polarization beam splitter comprises a first port, a second port and a third port, and is configured to perform polarization beam splitting on one path of input optical pulse input through the first port into a first path of optical pulse and a second path of optical pulse output through the second port and the third port, and rotate one of the polarization states, so that the polarization states of the two paths of optical pulses are the same after rotation; the integrated waveguide transmission light path is arranged between the second port and the third port; and a transmitter configured to transmit an optical pulse output from any one of the second and third ports back to the other of the second and third ports, the polarization beam splitting rotation device is further configured to combine the first and second paths of optical pulses and output the combined optical pulses through the first portafter receiving the first and second paths of optical pulses returned through the integrated waveguide transmission optical path. The integrated waveguide polarization orthogonal rotation reflection device can improve the reliability and stability of the system.

Description

technical field [0001] The present invention relates to the technical field of optical transmission secure communication, in particular to an integrated waveguide polarization orthogonal rotation reflection device, an integrated waveguide codec device including the integrated waveguide polarization orthogonal rotation reflection device and a corresponding quantum key distribution system. Background technique [0002] Quantum secure communication technology is a frontier hot field combining quantum physics and information science. Based on the quantum key distribution technology and the principle of one-time pad cryptography, quantum secure communication can realize the secure transmission of information in open channels. Quantum key distribution is based on physical principles such as the Heisenberg uncertainty relation in quantum mechanics and the quantum non-cloning theorem. It can safely share keys among users and detect potential eavesdropping behaviors. It can be applie...

AI Technical Summary

Problems solved by technology

[0005] The main purpose of the present invention is to propose an integrated waveguide polarization orthogonal rotation reflection device, an integrated waveguide codec device based on the integrated waveguide polarization orthogonal rotation reflection device, and a quantum key distribution system base

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