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Submarine optical cable disturbance monitoring system based on remote pump amplifier and operation method

A submarine optical cable, pump amplifier technology, applied in transmission systems, electromagnetic wave transmission systems, electrical components and other directions, can solve problems such as the inability to meet disturbance monitoring, and achieve the effect of easy popularization and application

Pending Publication Date: 2019-11-19
NO 34 RES INST OF CHINA ELECTRONICS TECH GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Unable to meet the disturbance monitoring of ultra-long spans over 200km without electrical relay submarine optical cables

Method used

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  • Submarine optical cable disturbance monitoring system based on remote pump amplifier and operation method
  • Submarine optical cable disturbance monitoring system based on remote pump amplifier and operation method
  • Submarine optical cable disturbance monitoring system based on remote pump amplifier and operation method

Examples

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Effect test

Embodiment 1

[0037] Embodiment 1 of the operation method of the submarine optical cable disturbance monitoring system based on the remote pump amplifier adopts the above-mentioned embodiment of the submarine optical cable disturbance monitoring system based on the remote pump amplifier, as follows figure 1 As shown, in this example, the detection light signal generated by the detection light source is transmitted along the first section of downlink transmission fiber 1, and the back Rayleigh scattering signal generated by the detection light signal in the first section of downlink transmission fiber 1 is transmitted along the first section of downlink transmission fiber 1. It is transmitted to the first fiber optic interferometer with a fiber optic mirror, interferes with the local signal of the first fiber optic interferometer, and outputs the first segment of disturbance monitoring signal directly connected to the first sampling module, and the first sampling module outputs digital samplin...

Embodiment 2

[0040] Embodiment 2 of the operation method of the submarine optical cable disturbance monitoring system based on the remote pump amplifier adopts the above-mentioned embodiment of the submarine optical cable disturbance monitoring system based on the remote pump amplifier, and is respectively arranged at both ends of the submarine optical cable such as figure 2 As shown, the monitoring system on the left end is the same as figure 1 It is the same as shown, and the monitoring system at the opposite end, that is, the right end is as follows image 3 As shown, it is also the same system as the embodiment of the above-mentioned submarine optical cable disturbance monitoring system based on the remote pump amplifier. In this example, the first section of downlink transmission fiber 1 at the left end and the first section of downlink transmission fiber 11 at the opposite end are each an optical fiber of a submarine optical cable, and the second section of downlink transmission fib...

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Abstract

The invention relates to a submarine optical cable disturbance monitoring system based on a remote pump amplifier and an operation method. A detection light source of the submarine optical cable disturbance monitoring system is connected with the starting end of a first section of downlink transmission optical fiber provided with a first optical fiber interferometer, and interference output is connected into a first sampling module. A detection optical signal is amplified by a remote pump amplifier and then connected to a second section of downlink transmission optical fiber provided with a second optical fiber interferometer, and interference output is sent to a monitoring signal transmission optical fiber through an isolator and is sent back to a second sampling module after passing through the amplifier, and two sampling modules are both connected to a demodulation module. According to the operation method, backward Rayleigh scattering signals generated on a first section downlink transmission optical fiber and a second section downlink transmission optical fiber are respectively transmitted back to a first optical fiber interferometer and a second optical fiber interferometer,and disturbed disturbance monitoring signals respectively obtain sampling data at a first sampling module and a second sampling module and are transmitted to demodulation equipment to analyze and early warn safety states of a first section submarine cable and a second section submarine cable. For the submarine optical cable disturbance monitoring system, the single-end detection distance of the submarine cable reaches 200 km, and the distance measurement and distance measurement at the two ends reach 400 km, and physical safety real-time monitoring of the long-span electric-relay-free submarine optical cable is achieved.

Description

technical field [0001] The invention relates to a distributed optical fiber sensing system, in particular to a submarine optical cable disturbance monitoring system based on a remote pump amplifier and an operation method for long-span physical safety monitoring. Background technique [0002] Submarine optical cable is a communication transmission cable laid on the seabed and is an important part of the Internet and other underwater optical networks. However, submarine optical cables are easily damaged, such as earthquakes, ship anchors and fishing nets, etc. may damage submarine optical cables, and may even be damaged by humans. At present, relay submarine optical cables generally use COTDR (Coherent Detection OTDR Coherent Detection Optical Time Domain Reflectometer, OTDR Optical Time Domain Reflectometer, Optical Time Domain Reflectometer) to realize the health detection of the optical fiber link, which has the ability to check the amplifiers on the entire optical fiber l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/071
CPCH04B10/071
Inventor 岳耀笠赵灏欧阳竑唐超付益童章伟
Owner NO 34 RES INST OF CHINA ELECTRONICS TECH GRP