A high-precision optical fiber time synchronization method based on optical fiber frequency transfer
A fiber optic frequency and time synchronization technology, applied in time division multiplexing systems, multiplexing system selection devices, electrical components, etc., can solve the problems of application limitations, poor stability of time signals, etc., and achieve high accuracy , high stability effect
Active Publication Date: 2018-06-05
NAT TIME SERVICE CENT CHINESE ACAD OF SCI
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However, if the stability of the time signal is poor, even if it has high accuracy, its application will be greatly limited, especially in occasions with high real-time requirements
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[0023] According to the application requirements of optical fiber time synchronization technology, the present invention proposes a high-precision optical fiber time synchronization method based on optical fiber frequency transmission, which uses optical fiber frequency transmission to realize the phase stability of the frequency signal at the transmitting end and the receiving end; uses the frequency signal to generate the time signal; The time signal is calibrated using fiber optic time synchronization. The frequency signal obtained by the optical fiber frequency transmission method at the receiving end has the advantage of high stability, which can eliminate the noise and temperature drift of the optical fiber link in real time; the time signal obtained by the optical fiber time synchronization method at the receiving end has the advantage of high accuracy, which can accurately Realize time synchronization accurately; the high-precision optical fiber time synchronization met...
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The invention discloses a high-precision optical fiber time synchronization method based on optical fiber frequency transfer. The high-precision optical fiber time synchronization method comprises the steps of implementing frequency signal phase stabilization for a transmitting end and a receiving end by employing the optical fiber frequency transfer; generating a time signal by employing a frequency signal; and performing calibration on the time signal by employing optical fiber time synchronization. The frequency signal obtained by the optical fiber frequency transfer method at the receiving end has the advantage of high stability, so noise and temperature drift of an optical fiber link can be eliminated in real time; as the time signal obtained by the optical fiber time synchronization method at the receiving end has the advantage of high accuracy, time synchronization can be implemented accurately; and the high-precision optical fiber time synchronization method based on the optical fiber frequency transfer combines with the advantages of the high stability of the optical fiber frequency transfer and the high accuracy of the optical fiber time synchronization method, so the high stability and the high accuracy for the time synchronization are implemented.
Description
technical field [0001] The invention belongs to the technical field of timing synchronization and relates to a time synchronization method, in particular to a high-precision optical fiber time synchronization method based on optical fiber frequency transmission. Background technique [0002] In the fields of aerospace, radar synchronization, cutting-edge weapon control, high-speed communication, and deep space exploration, high requirements are placed on the accuracy and stability of time synchronization. The current long-wave timing can only achieve synchronization accuracy of microseconds, satellite common viewing can only achieve synchronization accuracy of nanosecond level, and even the expensive satellite two-way comparison method can only achieve synchronization accuracy of hundreds of picoseconds. The optical fiber time synchronization method can achieve a synchronization accuracy of one hundred picoseconds, and the equipment price is much lower than the satellite two...
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IPC IPC(8): H04J3/06H04J3/16H04Q11/00
CPCH04J3/0617H04J3/1611H04Q11/0062H04Q2011/0045
Inventor 陈法喜赵侃刘涛张首刚周旭
Owner NAT TIME SERVICE CENT CHINESE ACAD OF SCI