Single-span long distance WDM line fiber transmission system

An optical fiber transmission, long-distance technology, applied in the field of optical information transmission, can solve the problems of inability to meet the ultra-long single-span distance optical information transmission, limited single-span system transmission distance, etc., to extend the line transmission distance, high gain, and improve OSNR. performance effect

Active Publication Date: 2017-10-24
FENGHUO COMM SCI & TECH CO LTD
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Problems solved by technology

However, the transmission distance of the single-span system realized by the backward bypass first-order remote pump ampli

Method used

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  • Single-span long distance WDM line fiber transmission system
  • Single-span long distance WDM line fiber transmission system
  • Single-span long distance WDM line fiber transmission system

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specific Embodiment approach

[0029] according to figure 2 Set up a WDM system with a single channel rate of 100Gbit / s and a long single-span transmission system configuration. The originating end of the terminal equipment uses 5 optical channels with a channel spacing of 100Ghz. The channel frequency points are respectively 193.00Thz, 192.90Thz, 192.80Thz, 192.70Thz, 192.60Thz, and the wavelength bands corresponding to 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 5 optical signals is 100Gbit / s, and the PM-QPSK modulation format based on coherent reception is adopted, without dispersion compensation, and its super FEC error correction coding adopts a combination of 7% hard decision and 13% soft decision In this way, it has a strong ability to correct sudden large errors and can correct the error rate of 2.4E-2 to below 1E-13. The transmitter uses a multiplexer to multip...

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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 big cities to improve communication efficiency, or when used in coastal islands, or in swamps, deserts, and forests, single-span ultra-long sections need to be used High-speed WDM system for distance. According to the domestic industry standards for WDM systems, WDM systems with a transmission distance of less than 1000km are called conventional long-distance transmission systems, and WDM systems with a transmission distance of 1000-2000km are called sub-ultra-long transmission (ELH) systems, and those with a transmission distance greater than 2000km The WDM system is called the Ultra Long Distance Transmissi...

Claims

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Application Information

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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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