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Transmission method and system applied to ultra-long-span optical fiber communication

A technology of optical fiber communication and transmission method, which is applied in the field of transmission method and system of ultra-long-span optical fiber communication, which can solve problems such as signal distortion and signal influence, and achieve the effect of extending distance and reducing bit error rate

Active Publication Date: 2020-07-28
国网新疆电力有限公司信息通信公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention provides a transmission method and system applied to ultra-long-span optical fiber communication, which overcomes the above-mentioned deficiencies in the prior art, and can effectively solve the problem that the existing transmission system applied to ultra-long-span optical fiber communication exists in the front-end transmission link The noise introduced by the Raman pump light affects the signal, causing the signal to reach the receiver to be distorted

Method used

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  • Transmission method and system applied to ultra-long-span optical fiber communication
  • Transmission method and system applied to ultra-long-span optical fiber communication
  • Transmission method and system applied to ultra-long-span optical fiber communication

Examples

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Effect test

Embodiment 1

[0046] Example 1: As attached figure 1 , 2 As shown in, 3, and 4, the transmission method applied to ultra-long span optical fiber communication includes the following steps:

[0047] The first step: the signal transmitter transmits the signal light to the front-end Raman amplification module, and then enters the second step;

[0048] Step 2: The transmission process of signal light in the front-end Raman amplification module is as follows:

[0049] (1) The front-end Raman amplifier module includes a first forward Raman pump structure, a first transmission fiber, and a first backward Raman pump structure. The first forward Raman pump structure provides the same signal power transmission direction The forward second-order Raman pump light, the signal light and the forward second-order Raman pump light are coupled to the first transmission fiber for transmission;

[0050] (2) Place a first reflecting device on the front side of the wavelength division multiplexer in the first rearward R...

Embodiment 2

[0067] Example 2: As attached figure 1 , 2 As shown in, 3, and 4, the transmission system for ultra-long-span fiber communication includes a signal transmitter, a front-end Raman amplifier module, a second transmission fiber, a middle amplifier module, a fourth transmission fiber, and a back-end Raman amplifier module ; The front-end Raman amplification module includes a first forward Raman pump structure, a first transmission fiber and a first backward Raman pump structure, the first backward Raman pump structure includes a first reflection device and a wavelength division complex The middle amplifier module includes the first optical fiber amplifier, the third transmission fiber and the second optical fiber amplifier; the rear Raman amplifier module includes the second forward Raman pump structure, the fifth transmission fiber and the second backward Raman A pumping structure, the second backward Raman pumping structure includes a second reflecting device and a wavelength divi...

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Abstract

The invention relates to the technical field of the optical fiber communication, and is a transmission method and system applied to ultra-long cross-optical fiber communication. The transmission method comprises the following steps: step one, a signal transmitter transmits signal light to a front-end Raman amplification module; step two, the signal light is transmitted in the front-end Raman amplification module; step three, the signal light enters a middle amplifier module through a second transmission optical fiber, and the signal light is transmitted in the middle amplifier module; step four, the signal light is transmitted in a back-end Raman amplification module; and step five, the signal light is output the a signal receiver from the second backward Raman amplification structure, andreduces the data on the signal light. A backward one-order Raman pump light is produced by using the two-order Raman pump light and the feedback effect formed by using Rayleigh scattering in the reflecting device and the transmission optical fiber, thereby indirectly providing the gain for the signal; the spontaneous radiation caused by the pump source and the relative strength noise are restrained, the bit error rate of a receiving end signal is reduced, and the single-span transmission distance is prolonged.

Description

Technical field [0001] The invention relates to the technical field of optical fiber communication, and is a transmission method and system applied to ultra-long cross-fiber communication. Background technique [0002] With the development of optical fiber communication technology, optical fiber transmission systems that require single-span non-electric relays have longer and longer distances and higher and higher transmission rates. In this case, the general transmission structure adopts the forward first-order Raman light to directly amplify, after transmitting through one end of the optical fiber, it is concentratedly amplified by the optical fiber amplifier, and then through one end of the transmitting optical fiber, it is amplified by the second optical fiber amplifier. The backward first-order Raman light is directly amplified. Among them, the difference between the wavelength of the pump light used in the first-order Raman amplification and the wavelength of the signal li...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/25H04B10/2507H04B10/572H01S3/067H01S3/30
CPCH01S3/06754H01S3/302H04B10/2507H04B10/2589H04B10/572
Inventor 周文婷赵明君崔力民王鑫李路民曾山陈建新侯建明宋广磊张海波张玮
Owner 国网新疆电力有限公司信息通信公司