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A distributed optical fiber broadband phase-stable transmission distribution system and method based on loop topology

A distributed optical fiber and phase-stable transmission technology, which is applied in optical fiber transmission, transmission system, electromagnetic wave transmission system, etc., can solve the problems of large distributed transmission system, complex control, and deterioration of transmission frequency signal frequency/phase, etc., to avoid system Large size, phase stability, and performance-enhancing effects

Active Publication Date: 2021-06-08
THE 44TH INST OF CHINA ELECTRONICS TECH GROUP CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

High-precision optical fiber frequency stable phase transmission is faced with the problem that the transmission delay of the optical fiber link changes with factors such as temperature, stress, vibration, and transmission wavelength, which deteriorates the frequency / phase of the transmitted frequency signal; in the distributed frequency phase stable transmission system , and there is no guarantee that each user node can achieve phase synchronization / consistent frequency signal reception
For distributed frequency-stable transmission, a commonly used method is to operate multiple sets of point-to-point frequency-stable transmission systems independently, but as the number of distributed nodes increases, the entire distributed transmission system will become larger and larger, and the control will become more and more complicated

Method used

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  • A distributed optical fiber broadband phase-stable transmission distribution system and method based on loop topology
  • A distributed optical fiber broadband phase-stable transmission distribution system and method based on loop topology
  • A distributed optical fiber broadband phase-stable transmission distribution system and method based on loop topology

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Embodiment 1

[0053] Such as figure 1 As shown, it is a structural schematic diagram of a preferred embodiment of the distributed optical fiber broadband phase-stable transmission and distribution system based on the loop topology of the present invention. The transmission system includes a broadband frequency source 1, an optical fiber frequency phase-stable transmission unit 2, N user units 3 connected in series and M optical amplification units 4 connected in series, and the optical fiber frequency phase-stable transmission unit 2 has a first port , a second port and a third port, the output end of the broadband frequency source 1 is connected to the first port of the optical fiber frequency phase-stable transmission unit 2, and the second port of the optical fiber frequency phase-stable transmission unit 2 passes through N users in sequence The unit 3 and M optical amplification units 4 are connected to the third port of the optical fiber frequency phase-stable transmission unit 2, and ...

Embodiment 2

[0072] Such as Figure 4 As shown, it is a flow chart of the distributed optical fiber broadband phase-stable transmission distribution method based on the loop topology of the present invention, which specifically includes the following steps:

[0073] In this embodiment, the wavelength of the reference frequency signal transmitted from the second port of the optical fiber frequency phase-stable transmission unit 2 to the optical fiber loop is 1551.72 nm, and is transmitted from the third port of the optical fiber frequency phase-stable transmission unit 2 to The wavelength of the broadband signal in the optical fiber loop is 1550.12nm, the wavelength of the reference frequency signal is 1548.52nm, the broadband signal to be transmitted is any bandwidth frequency signal between 10-18GHz, and the frequency of the reference frequency signal is 1GHz. The coupling ratio of the 2×2 optical coupler used in the subscriber unit 3 is 20:80.

[0074] S1: The broadband frequency source...

Embodiment 3

[0114] Embodiment three such as Figure 4 As shown, it is a flow chart of the distributed optical fiber broadband phase-stable transmission distribution method based on the loop topology of the present invention, which specifically includes the following steps:

[0115] The difference between this embodiment and Embodiment 2 is that the broadband signal sent by the broadband frequency source in this embodiment is a pulse frequency sweep signal, and its working principle is the same as that of Embodiment 2. The difference is that the second embodiment implements broadband phase-stable transmission through phase measurement, and this embodiment implements broadband phase-stable transmission through delay measurement. In this embodiment, the wavelength of the reference frequency signal transmitted from the second port of the optical fiber frequency phase-stable transmission unit 2 to the optical fiber loop is 1551.72 nm, and is transmitted by the third port of the optical fiber f...

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Abstract

The invention discloses a distributed optical fiber broadband frequency stable phase transmission distribution system and method based on a loop topology, comprising a broadband frequency source, an optical fiber frequency stable phase transmission unit, N subscriber units and M optical amplification units. The phase-stable transmission unit, N subscriber units and M optical amplifier units are connected by optical fibers to form a single-fiber bidirectional serial loop topology path. The influence of environmental factors such as temperature on optoelectronic devices can also effectively avoid the disadvantages of large size and complex control of the optical fiber frequency stable phase transmission unit system when the number of distributed nodes increases.

Description

technical field [0001] The invention relates to the technical field of optical fiber broadband transmission, in particular to a distributed optical fiber broadband phase-stable transmission distribution system and method based on a loop topology. Background technique [0002] High-precision frequency signals have important application value in the fields of satellite navigation, aerospace, deep space exploration, reconnaissance and early warning. Optical fiber transmission has the advantages of low loss, large capacity, large bandwidth, high speed, high stability, safety and reliability, and has been widely used in the communication field. Fiber-based frequency transmission is an effective way to achieve higher-precision frequency transmission and distribution, and continues to promote the development of microwave photonics related fields. High-precision optical fiber frequency stable phase transmission is faced with the problem that the transmission delay of the optical fi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/25H04B10/2575H04B10/40
CPCH04B10/25H04B10/25755H04B10/40
Inventor 张浩
Owner THE 44TH INST OF CHINA ELECTRONICS TECH GROUP CORP
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