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Cascade optical fiber microwave frequency transmission system and transmission method

A microwave frequency and transmission system technology, applied in optical fiber transmission, transmission system, optical fiber radio, etc., can solve the problems of increasing system complexity and reducing system reliability, and achieves a simple structure, high reliability, and improved phase compensation bandwidth. Effect

Active Publication Date: 2022-03-08
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the relay end of this solution adds a set of transceiver equipment, which greatly increases the complexity of the system and reduces the reliability of the system.

Method used

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  • Cascade optical fiber microwave frequency transmission system and transmission method
  • Cascade optical fiber microwave frequency transmission system and transmission method
  • Cascade optical fiber microwave frequency transmission system and transmission method

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Embodiment Construction

[0049] Below in conjunction with embodiment and accompanying drawing, the present invention will be further described, and present embodiment is carried out on the premise of technical solution of the present invention, has provided detailed implementation mode and and specific work flow, but protection scope of the present invention is not limited to the following the described embodiment.

[0050] Please see first figure 1 , figure 1 It is the cascaded optical fiber microwave frequency transmission system of the present invention, including a local terminal 1, a first optical fiber link 2, a relay site 3, a second optical fiber link 4 and a user end 5:

[0051] The local terminal 1 is composed of a frequency multiplier 1-1, a first signal conversion module 1-2, a first electrical filter 1-3, a first electro-optical modulator module 1-4, and a first photoelectric receiving module 1-5 Composed of the first optical wavelength division multiplexer 1-6, the input end of the fre...

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Abstract

The invention relates to a cascade optical fiber microwave frequency transmission system and transmission method, and the device comprises a local end, a first optical fiber link, a relay station, a second optical fiber link and a user end, the relay station is used for obtaining phase noise introduced by the first optical fiber link and the second optical fiber link at the same time; phase noise introduced by the asynchronous source of the first optical fiber link and phase noise introduced by the second optical fiber link are compensated at the same time through a phase compensation unit of the relay station, so that the user side and the relay side can obtain microwave signals with stable phases, and long-distance optical fiber microwave frequency transmission is achieved. The structure of the cascade microwave frequency transmission system is simplified, the loop bandwidth of the system is effectively improved, and in addition, the system has the advantages of being low in ground noise, simple in structure and high in reliability.

Description

technical field [0001] The invention relates to optical fiber time and frequency transmission, in particular to a cascade optical fiber microwave frequency transmission system and transmission method. Background technique [0002] High-precision, long-distance microwave frequency transmission has important applications in satellite navigation, radio astronomy, precision metrology, and high-precision clock comparison. In recent years, with the continuous improvement of the performance of the atomic frequency standard, its performance has been improved by an order of magnitude every 7-10 years. Currently, the best microwave frequency references based on cesium atomic clocks have long-term instability in the range of 10 -16 order of magnitude, and the frequency transfer based on satellite links is unable to meet the current needs of many fields due to the influence of atmospheric channels. [0003] Due to its low loss, large bandwidth, and immunity to electromagnetic interfer...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/29H04B10/2575H04B15/00
CPCH04B10/29H04B10/2575H04B15/00
Inventor 胡亮李奇吴龟灵刘娇陈建平
Owner SHANGHAI JIAO TONG UNIV
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