摘要
With the improvement of the accuracy of atomic frequency standard and satellite navigation,the high-resolution phase comparison method is necessary.Using the phase synchronous detection principle,a super-high resolution phase comparison method between frequency standards is proposed based on the greatest common factor frequency,phase group processing and a common frequency source and so on.This method is mainly dependent on the stability of the common frequency standard and its frequency.The ±1 count error can be eliminated effectively.Therefore,higher than 1 ps resolution can be easily reached with a simple instrument.Experimental results show higher than 10-15/h precision can be obtained in the long-term frequency standard comparison and the measuring precision can reach 10-17 for several days of comparison.
作者
于建国
周渭
杜保强
董绍锋
范巧燕
YU Jian-Guo;ZHOU Wei;DU Bao-Qiang;DONG Shao-Feng;FAN Qiao-Yan(Department of Measurement and Instrument,Xidian University,Xi’an 710071;School of Electric and Information Engineering,Zhengzhou University of Light Industry,Zhengzhou 450002)
基金
Supported by the National Natural Science Foundation of China under Grant Nos 10978017 and 60772135
the Open Fund of Key Laboratory of Time and Frequency Primary Standards(CAS)
the Postdoctoral Foundation of China under No 94469
the Basic and Advanced Technology Research Foundation of Hennan Province under Grant No 122300410169
the Fundamental Research Funds for the Central Universities.
