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High-precision optical fiber time-frequency transmission system and method compatible with Ethernet

A technology of time-frequency transmission and Ethernet, which is applied in optical fiber transmission, transmission system, electromagnetic wave transmission system, etc., can solve the problems of poor frequency transmission stability, etc., and achieve the goal of improving compatibility, broadening application fields, and improving frequency transmission performance Effect

Active Publication Date: 2022-03-08
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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Problems solved by technology

[0005] In order to overcome the deficiencies of the above existing technologies, in the time-frequency transmission technology for Ethernet, due to the influence of high-speed serial transceiver or serial-to-parallel conversion chip clock recovery noise, clock tree noise in FPGA, DDMTD measurement noise, etc., the frequency transmission is stable The present invention proposes a high-precision optical fiber time-frequency transmission system and method compatible with Ethernet. The Ethernet digital coded signal is used as a carrier, mixed with a high-precision analog frequency signal, and the same wavelength is transmitted in an optical fiber link, effectively The frequency transmission performance is improved without breaking the original Ethernet data, which broadens the application field

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  • High-precision optical fiber time-frequency transmission system and method compatible with Ethernet
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  • High-precision optical fiber time-frequency transmission system and method compatible with Ethernet

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Embodiment Construction

[0034] The following is a detailed description of the embodiments of the present invention: this embodiment is implemented on the premise of the technical solution of the present invention, and provides detailed implementation methods and specific operation processes. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these all belong to the protection scope of the present invention.

[0035] figure 1 It is the structural diagram of embodiment 1. As shown in the figure, it includes a time / frequency source 1, a first terminal 2, an optical fiber link 3, a second terminal 4, and a time / frequency output 5. The first terminal 2 is composed of the first Ethernet time synchronization unit 2- 2. The first frequency synchronization unit 2-3, the first mixing / separation unit 2-4, the second terminal 4 is composed of the second Ethernet time synchronization unit (4-2), the sec...

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Abstract

A high-precision optical fiber time-frequency transmission system and method compatible with Ethernet, the system includes a time / frequency source, a first end machine, an optical fiber link, a second end machine and a time / frequency output; the time / frequency source and The first terminal is connected to the second terminal through an optical fiber link, and the second terminal is connected to the time / frequency output. The present invention uses the Ethernet digital signal as the carrier, and the high-precision frequency signal as the modulation signal to mix the digital signal. While improving the frequency transmission performance, the original Ethernet data and network topology structure are not damaged, and the high-precision time is greatly improved. The compatibility of the frequency transmission system also has the characteristics of simple structure and low cost, which broadens the application field.

Description

technical field [0001] The invention relates to the technical field of optical fiber time-frequency transmission and measurement and control, in particular to a high-precision optical fiber time-frequency transmission system and method that integrates time transmission based on Ethernet digital coding and high-precision analog frequency transmission. Background technique [0002] Time frequency is the cornerstone of human activities and information interaction. It is also the highest measurement accuracy of all physical quantities and the only physical quantity that can be transmitted and calibrated over long distances around the world. High-precision time-frequency transmission fully supports social and economic activities and cutting-edge scientific research. , national defense and military operations and other aspects of modern society. Using laser as the carrier of the time-frequency signal and optical fiber as the transmission medium can achieve the highest precision lo...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/2575H04B10/548
CPCH04B10/2575H04B10/548
Inventor 鲁湛程楠蔡海文桂友珍刘雷
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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