Synchronization method and device applied to quantum key distribution system and distribution system
A quantum key distribution and synchronization device technology, applied to synchronization devices and key distribution, can solve the problems of multi-occupancy and realization efficiency, achieve considerable economic benefits, high realization efficiency, and save devices
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Embodiment 1
[0062] Such as image 3 As shown, in this embodiment, the system used in the quantum key distribution method includes a laser, an optical fiber, and a single-photon detector, and the laser is connected to the single-photon detector through an optical fiber. Compared with the existing synchronization scheme that uses wavelength synchronization light different from quantum signal light, this scheme does not need to use synchronization light laser, PIN tube detector and WDM device, which simplifies the system installation.
[0063] see Figure 4 As shown, the emission scheme of the transmitting end of the above-mentioned system is as follows: the laser follows a fixed frequency f 1 Emit strong light ① and ②, within the time interval between two strong lights ① and ②, according to the fixed frequency f 2 emit quantum signal light. where f 2 >>f 1 . The system starts to work, first sends a strong light, and numbers the strong light sent. A group of quantum signal lights behi...
Embodiment 2
[0079]This embodiment provides a synchronization device, including a laser arranged at the transmitting end of the quantum key distribution system, an optical fiber and a detector arranged at the receiving end of the quantum key distribution system. The difference from Embodiment 1 is that the detector includes Two: PIN tube detectors and single photon detectors.
[0080] The light-emitting scheme of the transmitting end of the synchronization device is as in the first embodiment, and the detection scheme of the receiving end of the system is different from the first embodiment, that is, the PIN tube detector is used to detect the strong light, and the single-photon detector is used to detect the quantum signal light. That is, the hardware structure and connection method of the receiving end can be the same as the synchronization device of the existing quantum key distribution system.
[0081] In the above two embodiments, at least one transmitter at the transmitting end of th...
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