Research On The High Precision Time-frequency Transfer Technology Based On Laser

With the optical clocks and the emergence of femtosecond optical frequency comb,the time and frequency technology has developed rapidly.All these have higher requirements for the high precision time frequency transfer technique.The traditional satellite-based microwave-frequency transfer technology has not been able to satisfy the high accuracy of frequency transfer.The laser based time-frequency transfer technology has great potential.It has become a research hotspot in the field of time and frequency transfer in recent years.In this paper,from the point of view of the high precision laser time andfrequency transfer,we carried out the following work: first of all,systematically studied the theory of related evaluation index in the time and frequency transfer,the theoreticalresearch of frequency and time representationin the frequency transferstability and the transformation relationship;This paper also introducedseveral laser detection technologies in the time and frequency transfer andthe principle of phase noise compensation method in the fiber optical frequency transfer;Then carried on simple analysis,modeling and simulation experiment to the factors which influence space time and frequency transfer: phase noise of frequency source,photoelectric detection noise and space pointing error noise;Finally,weintroduced the detailed fiber optical frequency transfer experimental scheme based on the back and forth phase noise compensation method around 10 km laboratory fiber and results: in the 3 m fiber withoutphase noise compensation experiment,the relative frequency transferstability（ADEV）are 2.13×10^-15/s and 2.55×10^-16/10⁴ s,in the 3m fiber phase noise compensation experiment,the relative frequency transfer stability are 3.79×10^-16/s and 8.29×10^-19/10⁴s;The relative frequency transfer stability of 10 km fiber without phase noise compensation experiment is 2.10×10^-14/s and 9.39×10^-15/10⁴ s,and the relative frequency transfer stability of 10 km fiberphase noise compensation experiment is 3.84×10^-16/s and 5.39×10^-18/4000 s.