A test system for quantum light source single photon of a QKD device

Abstract

The application provides a kind of QKD equipment quantum light source single photon testing system, contain QKD sending end, 2 QKD receiving end, optical switch and control end, control end gives sending end-first receiving end and sending end-second receiving end branch path intersection point optical switch of sending end, open split light mode, and generate a random sequence, issue to first and second receiving end as measurement base selection sequence, give first and second receiving end command, shield error correction module and security enhancement module, let QKD sending end start sending quantum light, open key distribution process, after a period of key distribution, collect the key sequence of first and second receiving end respectively, calculate key consistency coefficient, the lower the key consistency coefficient, the better the single photon of quantum light source, the single photon of sending end quantum light source is judged by the key consistency coefficient of actual measurement.The application can effectively utilize the existing resources of QKD equipment to effectively detect the single photon of QKD system.

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