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A single-span long-distance wdm line optical fiber transmission system

A fiber optic transmission and long-distance technology, applied in the field of optical information transmission, can solve the problems of unsatisfactory ultra-long single-span optical information transmission and limited transmission distance of single-span systems, and achieve extended line transmission distance, high gain, and improved OSNR performance effect

Active Publication Date: 2019-06-25
FENGHUO COMM SCI & TECH CO LTD
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AI Technical Summary

Problems solved by technology

However, the transmission distance of the single-span system realized by the backward bypass first-order remote pump amplification technology is limited, and it cannot meet the optical information transmission of ultra-long single-span distance.

Method used

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  • A single-span long-distance wdm line optical fiber transmission system
  • A single-span long-distance wdm line optical fiber transmission system
  • A single-span long-distance wdm line optical fiber transmission system

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specific Embodiment approach

[0029] according to figure 2 Build a WDM system with a single-channel rate of 100Gbit / s for ultra-long single-span transmission system configuration. The sending end of the terminal equipment adopts 5 optical channels with a channel interval of 100Ghz, and the channel frequencies are 193.00Thz, 192.90Thz, 192.80Thz, 192.70Tz, 192.60Tz, and the corresponding wavelength bands of these frequency points in the C-band The amplified noise figure is relatively low, and higher optical transmission performance OSNR can be obtained. The single-channel rate of these five optical signals is 100Gbit / s, and the PM-QPSK modulation format based on coherent reception is adopted without dispersion compensation, and its super-strong FEC error correction code adopts a combination of 7% hard decision and 13% soft decision It has a very strong error correction capability for sudden large errors, and can correct the bit error rate of 2.4E-2 to below 1E-13. The originator uses the multiplexer to c...

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Abstract

The invention discloses a single-span long distance WDM line fiber transmission system, and relates to the optical information transmission technical field; the single-span long distance WDM line fiber transmission system comprises the following units from an optical signal sending end to a receiving end: a forward high rating raman amplifier, a forward bidirectional remote pump gain unit, a backward high rating raman amplifier, and a backward bidirectional remote pump gain unit; the single-span long distance WDM line fiber transmission system also comprises two bidirectional bypass second order remote pump pumping, wherein one bidirectional bypass second order remote pump pumping outputs pumping lights to the forward bidirectional remote pump gain unit, and the other bidirectional bypass second order remote pump pumping outputs pumping lights to the backward bidirectional remote pump gain unit. The WDM line fiber transmission system OSNR performance can be improved, and the WDM system is suitable for line super long single-span distance optical information transmission.

Description

technical field [0001] The invention relates to the technical field of optical information transmission, in particular to a single-span long-distance WDM line optical fiber transmission system. Background technique [0002] In order to solve the internal communication problems in some developed areas, it is necessary to build direct optical fiber transmission routes between large cities to improve communication efficiency, or when it is applied on coastal islands, or when it is applied in swamps, deserts, and forests, it is necessary to use single-span ultra-long High rate WDM system for long distances. According to domestic industry standards on WDM systems, WDM systems with a transmission distance of less than 1000km are called conventional long-distance transmission systems, WDM systems with a transmission distance of 1000-2000km are called sub-extra long-distance The WDM system is called an Ultra Long Haul (ULH) system. [0003] At present, the long-distance transmissi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/25H04B10/291
CPCH04B10/25H04B10/2916
Inventor 黄艳琼龚浩敏梅亮
Owner FENGHUO COMM SCI & TECH CO LTD
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