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Double-fiber double-loop-back time delay deviation estimation compensation method in optical fiber time transmission

A technology of time transfer and loopback delay, applied in time division multiplexing systems, electrical components, multiplex communication, etc., to eliminate the influence of optical fiber time synchronization accuracy, improve optical fiber time transfer accuracy, and eliminate unmeasurable Effect

Active Publication Date: 2021-01-08
NAVAL UNIV OF ENG PLA
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Problems solved by technology

Therefore, it is only suitable for testing under normal temperature conditions in the laboratory, and further analysis is required for the actual laid optical fiber

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  • Double-fiber double-loop-back time delay deviation estimation compensation method in optical fiber time transmission
  • Double-fiber double-loop-back time delay deviation estimation compensation method in optical fiber time transmission
  • Double-fiber double-loop-back time delay deviation estimation compensation method in optical fiber time transmission

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Embodiment Construction

[0040] The present invention will be further described below in conjunction with accompanying drawing:

[0041] Such as figure 1Shown: the present invention comprises master and slave two timing station points, master timing station comprises: clock source, laser transmitter, wavelength division multiplexing module, time interval counter, optical detector, and slave timing station comprises: clock, laser transmitter , wavelength division multiplexing module, time interval counter, optical detector, delay compensation module; the laser transmitter is used to convert the time signal into an optical signal; the wavelength division multiplexing module is used to modulate the time signal to two different wavelengths and send it to In the optical fiber link, the input end of the transmitting channel is connected to the output end of the laser transmitter, and the output end of the transmitting channel is used to connect with the optical fiber link; the output end of the receiving ch...

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Abstract

The invention discloses a double-fiber double-loop-back time delay deviation estimation compensation method in optical fiber time transmission. The method comprises the following steps: acquiring measured values TIC1, TIC2 and TIC3 through three time measurement modules; calculating a one-way time delay value tau 1 from the master station to the slave station according to the obtained time delay value and time delay ratio relation; the obtained time delay value tau 1 compensates a slave station clock in a slave station time delay compensation module to realize master-slave station time synchronization; and repeating the above steps to obtain the real-time value of tau 1, thereby realizing real-time time synchronization of the master station and the slave station. According to the method, the influence of environment temperature change on the optical fiber time synchronization precision can be eliminated, the influence that the optical fiber length of an existing network cannot be measured and the optical fiber length is affected by temperature change can be eliminated, the time delay deviation of a time signal during transmission in an optical fiber link can be accurately measured,real-time automatic compensation can be realized, and the optical fiber time transmission precision can be improved.

Description

technical field [0001] The invention relates to the technical field of optical fiber time service synchronization, in particular to a method for estimating and compensating for a dual-fiber double-loop time delay deviation in optical fiber time transfer. Background technique [0002] With the continuous breakthrough of high-precision frequency standard technology, the current atomic frequency standard with the highest precision has reached 10 -16 order of magnitude, the second stability and day stability of the optical clock have reached 10 -16 and 10 -18 Time has become the physical quantity with the highest measurement accuracy among the seven international basic units. With the continuous improvement of time synchronization accuracy and stability requirements in scientific research, navigation and positioning, aerospace, power transmission, military security and other fields, how to transmit high-precision time-frequency information to each client has become an importan...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04J3/06
CPCH04J3/0638H04J3/0682
Inventor 李方能陈丁吴苗许江宁何泓洋梁益丰于燕婷
Owner NAVAL UNIV OF ENG PLA
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