Two-way Quantum Time Synchronization Method Based on Frequency Entanglement Light Source
A time synchronization and entanglement source technology, applied in photonic quantum communication, time division multiplexing system, electrical components, etc., can solve problems that affect measurement accuracy and cannot overcome time fluctuations in optical fiber links
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[0011] The present invention will be further described below in conjunction with the accompanying drawings and embodiments, and the present invention includes but not limited to the following embodiments.
[0012] The present invention provides a two-way quantum time synchronization technology based on frequency entanglement light source, its principle is as follows figure 1 As shown, it includes three parts: preparation, transmission and detection of entangled light source.
[0013] The invention adopts 780nm laser to pump PPKTP crystal to spontaneously convert parameters to generate frequency entanglement source, and this technology is very mature in the field of quantum optics.
[0014] A and B are connected by an optical fiber of length l. The No. 1 entanglement source and the No. 2 entanglement source are located in A and B respectively, and the same wavelength of pump light and nonlinear medium are used to ensure that the wavelength distribution of the generated entangl...
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