Cascaded optical frequency transfer device and method

A frequency transmission and optical technology, applied in multi-level optical transmission, optical transmission system, optical fiber transmission, etc., can solve problems such as system reliability degradation

Active Publication Date: 2021-08-13
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, both the relay station and the front and back links of this scheme need phase-locked modules, which easily leads to a decrease in the reliability of the system

Method used

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  • Cascaded optical frequency transfer device and method
  • Cascaded optical frequency transfer device and method
  • Cascaded optical frequency transfer device and method

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Embodiment Construction

[0034] 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.

[0035] see figure 1 , figure 1 It is a schematic structural diagram of Embodiment 1 of the cascaded optical frequency transmission device of the present invention. It can be seen from the figure that the cascaded optical frequency transmission device of the present invention includes a local terminal 1, a first optical fiber link 2, a cascading station 3, a second Optical fiber link 4 and user terminal 5;

[0036] The local terminal 1 is composed of a first Y-type optical coupler 10, a first acousto-optic frequency shifter 11, a first radio frequency source 12 and a first Faraday rotati...

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PUM

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Abstract

The invention discloses a cascaded optical frequency transfer device and method, and the device comprises a local end, a first optical fiber link, a cascading station, a second optical fiber link and a user side, wherein the cascading station obtains the phase noise introduced by the first optical fiber link and the second optical fiber link at the same time; and a cascading station phase compensation unit compensates for the phase noise introduced by the first optical fiber link and the second optical fiber link at the same time, so that the user side obtains an optical frequency signal with a stable phase, and cascaded optical frequency transfer is realized. The phase compensation bandwidth can be effectively improved through the cascaded optical fiber link, the noise of the system is effectively reduced, and in addition, the system has the advantages of being 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 cascaded optical frequency transmission device and transmission method. Background technique [0002] With the rapid development of cold atom technology, optical atomic clocks, including optical ion clocks and optical lattice clocks, have developed rapidly, and their accuracy is close to 10 -19 At least one order of magnitude higher than the existing microwave atomic clocks, it has become a strong contender for the next generation of time-frequency benchmarks. At present, a variety of time-frequency transmission methods have been developed, among which the most widely used satellite-based space-based frequency transmission can only achieve 10 -15 / day frequency transmission stability. In addition to the time-frequency transmission method based on space-based satellites, the optical frequency transmission technology based on fiber-optic links has been proved man...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/2507H04B10/29
CPCH04B10/2507H04B10/29H04B2210/256H04B2210/003
Inventor 胡亮吴龟灵陈建平
Owner SHANGHAI JIAO TONG UNIV
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