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High-accuracy distributed optical fibre time synchronization system

A time synchronization system, distributed optical fiber technology, applied in time division multiplexing systems, electrical components, multiplexing communications, etc., can solve maintenance, management difficulties, instability and other problems, and achieve easy management and maintenance. Effect

Active Publication Date: 2014-05-21
SHANGHAI JIAO TONG UNIV
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Problems solved by technology

However, the electrical distributor requires optical / electrical / optical conversion and electrical processing, and is an active device, which will not only introduce additional instability, but also be difficult to maintain and manage

Method used

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Embodiment Construction

[0029] A specific implementation example of the present invention is given below in conjunction with the accompanying drawings. This embodiment is carried out on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific work flow are given, but the protection scope of the present invention is not limited to the following embodiments.

[0030] figure 1 It is a schematic structural diagram of an embodiment of a high-precision distributed optical fiber bidirectional time synchronization system of the present invention, as shown in the figure, wherein an optical splitter and an optical fiber form a 1×N passive optical distribution network 2 . The optical fiber time synchronization center 1 is located at the combiner end of the passive optical distribution network 2 . N optical fiber time synchronization units 3 are respectively located at N branch ends of the passive optical distribution network 2 . The system completes t...

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Abstract

The invention discloses a high-accuracy distributed optical fibre time synchronization system. The high-accuracy distributed optical fibre time synchronization system comprises an optical fibre time synchronization centre, a passive light distribution network and a plurality of optical fibre time synchronization units, wherein the optical fibre time synchronization centre is located at the combining end of the passive light distribution network, and each of the optical fibre time synchronization units is located at each branching end of the passive light distribution network. According to the high-accuracy distributed optical fibre time synchronization system disclosed by the invention, point-to-multipoint connection and connection control are realized by the passive light distribution network and a time division multiple access technology, and high-accuracy time comparison among points is realized by virtue of a bidirectional time comparison method, thus realizing high-accuracy distributed time synchronization.

Description

technical field [0001] The invention relates to the technology of optical fiber time-frequency transmission, in particular to a high-precision distributed optical fiber two-way time comparison system. Background technique [0002] High-precision time synchronization technology has important application value in the fields of satellite navigation, aerospace, deep space exploration, geological surveying and mapping, communication, power transmission, scientific research and measurement. At present, traditional high-precision time synchronization technologies mainly include GPS common view and satellite dual time comparison. The equipment required by the GPS common view method is relatively simple and low in cost, but the accuracy is difficult to reach the nanosecond level. Satellite two-way time comparison can achieve high-precision time synchronization, which can reach the sub-nanosecond level, but requires the use of dedicated satellite communication links. Due to the poor...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04J3/06H04J3/16
Inventor 胡亮吴龟灵江少平陈建平
Owner SHANGHAI JIAO TONG UNIV
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