Cascaded optical frequency transfer device and transfer 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: 2022-05-17
SHANGHAI JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
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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 transfer method
  • Cascaded optical frequency transfer device and transfer method
  • Cascaded optical frequency transfer device and transfer 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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Abstract

A cascaded optical frequency transfer device and transfer method, the device includes a local end, a first optical fiber link, a cascading station, a second optical fiber link and a user end, and the cascading station of the present invention simultaneously obtains the first optical fiber link and the phase noise introduced by the second optical fiber link, and simultaneously compensate the phase noise introduced by the first optical fiber link and the second optical fiber link through the phase compensation unit of the cascaded station, so that the user end can obtain a phase-stable optical frequency signal, realizing Cascaded optical frequency transfer. The invention can effectively increase the bandwidth of phase compensation by cascading optical fiber links, effectively reduce the noise floor of the system, and has the characteristics of simple system structure and high 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 Patents(China)
IPC IPC(8): H04B10/2507H04B10/29
CPCH04B10/2507H04B10/29H04B2210/256H04B2210/003
Inventor 胡亮吴龟灵陈建平
Owner SHANGHAI JIAOTONG UNIV
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