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Bidirectional optical-fiber time-frequency synchronization method and system of second pulse signal taming

A time-frequency synchronization, second pulse technology, applied in time division multiplexing systems, optical fiber transmission, bidirectional transmission and other directions, can solve the problems of low synchronization accuracy and stability, and cannot suppress link noise, and achieve synchronization accuracy and High stability and the effect of suppressing link noise

Inactive Publication Date: 2019-03-01
BEIJING INST OF RADIO METROLOGY & MEASUREMENT
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Problems solved by technology

[0003] This application proposes a fiber optic two-way time-frequency synchronization method and system tamed by a second pulse signal, which solves the problems that the existing technology cannot suppress link noise, and the synchronization accuracy and stability are not high

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[0018] In order to make the purpose, technical solution and advantages of the present application clearer, the technical solution of the present application will be clearly and completely described below in conjunction with specific embodiments of the present application and corresponding drawings. Apparently, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

[0019] In recent years, time-frequency transfer technology based on optical fiber links has experienced vigorous and rapid development. Through the 1840km optical fiber link, the researchers achieved a second-level relative stability of the laser carrier frequency of 2×10 -15 precise synchronization; in a short 50km optical fiber link, the second-lev...

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Abstract

The application discloses a bidirectional optical-fiber time-frequency synchronization method and system of second pulse signal taming. The method includes the steps of: establishing a bidirectional optical-fiber synchronization link between a master station and a slave station; carrying out coarse synchronization of laser second pulse signals of the master station and the slave station; measuringtime intervals of a local pulse and a received pulse in the master station and the slave station; sending information, which includes time intervals and time stamps of the master station, by the master station to the slave station; and taking one half of a value of difference between time intervals of the master station and the slave station of the same measurement time as clock difference of themaster station and the slave station. The application also provides the system used for the above method. Compared with existing optical-fiber link-based time-frequency synchronization methods, the method of the application has the advantages that link noises can be suppressed, and synchronization accuracy and stability are high.

Description

technical field [0001] The invention relates to the field of time-frequency synchronization based on optical fiber links, in particular to an optical fiber two-way time-frequency synchronization method and system tamed by pulse-per-second signals. Background technique [0002] In recent years, time-frequency transfer technology based on optical fiber links has experienced vigorous and rapid development. Through the 1840km optical fiber link, the researchers achieved a second-level relative stability of the laser carrier frequency of 2×10 -15 precise synchronization; in a short 50km optical fiber link, the second-level relative stability of laser carrier frequency synchronization can reach 2×10 -17 , has surpassed the stability of some optical atomic clocks. It can be seen that the time-frequency synchronization technology based on optical fiber links has excellent performance indicators in terms of synchronization distance and synchronization stability. However, it should...

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Application Information

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IPC IPC(8): H04B10/25H04J3/06H04J3/16
CPCH04B10/2589H04J3/0617H04J3/1676
Inventor 杨宏雷王海峰王学运王宏博易航张升康
Owner BEIJING INST OF RADIO METROLOGY & MEASUREMENT
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