Synchronous method of quantum key distribution system
A technology of quantum key distribution and synchronizing light, which is applied in the synchronization field of quantum key distribution system, can solve the problems such as the limitation of rate increase, restrict the operating frequency of QKD system, etc., and achieve the effect of improving the bit rate
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[0022] The present invention will be described in detail below in conjunction with the drawings.
[0023] figure 1 It is a schematic diagram of the synchronization method of the quantum key distribution system of the present invention. Taking 100kHz synchronization signal and 20MHz signal light as an example, the specific working steps of the present invention are as follows:
[0024] 1. The sender sends 100kHz synchronization light and 20MHz signal light, both of which are transmitted in the same optical fiber;
[0025] 2. After the synchronous light undergoes photoelectric conversion (photoelectric tube in this embodiment), a 100kHz synchronous electric signal is generated;
[0026] 3. The 100kHz synchronous electrical signal is multiplied by a low-jitter frequency multiplier (phase-locked loop in this embodiment) to a 20MHz synchronous electrical signal, and then output through the delay module as the gate control signal of the receiver's single photon detector;
[0027] 4. The 20MH...
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