Research Of Measuring Technology Based On Quantum Navigation And Position

The technology of navigation and positioning plays an important rolein national economy and military security. For today’s society, informationtechnology and international competition are developed more and morerapidly, the demand for a higher precision becomes stronger. Based ontraditional laser source and intensity distribution of light field, thedevelopment of classical navigation and positioning technology is limited,and the measurable maximum length and precision cannot be furtherimproved by the repetition of light pulses. Following with the developmentof quantum theory and application, the second-order coherence ofentangled photon pairs has aroused a growing interest recently. Theadvantage of second-order coherence has attracted more and moreattention, particularly in ranging, positioning, clock synchronization andquantum imaging.In current theories and experiments, the schemes of ranging and clocksynchronization based on second-order coherence of entangled source, hasbeen witnessed having enhanced precision, one can reach to Heisenberglimit, which it can only approach shot noise limit by traditionalmeasurement. In the experimental investigation shows, the competitiveadvantage in time correlation can be well applied in many situations suchas the optical time domain reflectometry, ranging, positioning, and clocksynchronization.This dissertation focuses on the the second-order coherence ofentanglement, covering the technology of clock synchronization and ranging in navigation and position field. The main work is as follows.1.Propose a distance ranging based on quantum entanglement. Inpresent quantum theories entangled source has been proved tohaving great correlation features and higher precision in quantummeasurement application. Because of great features of entanglementsecond order coherence, we propose a scheme of distance rangingwith a capability of high accuracy and powerful anti-jamming. Aranging experiment is present to measure a1043.3-m-long distanceusing entangled source produced by the spontaneous parametricdown conversion(SPDC) of nonlinear crystal, the optimizationresults show a precision of200m. In addition, the influence ofjamming noise on the ranging scheme is studied.2.Propose a clock synchronization based on ultra-bright quantumentanglement. The ultra-bright entanglement is produced by theSPDC process of PPKTP crystal in the clock synchronizationscheme, due to the immature technology of squeezed state andmultipath entanglement. We propose a clock synchronizationscheme based on entangled great correlation features and Einsteinsynchronization protocol and analyze the key parameter of precision,deviation in the proof-of-principle experiment, and achieve ahigh-precision result of clock synchronization.