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Dispersion compensation process of DWDM system

A technology of dispersion compensation and dispersion compensation fiber, applied in the field of dispersion compensation

Inactive Publication Date: 2012-12-05
ZTE CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011]d) Divide optical signals into groups and perform dispersion compensation separately. The device is relatively complicated and the flexibility is not good

Method used

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  • Dispersion compensation process of DWDM system
  • Dispersion compensation process of DWDM system

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Embodiment Construction

[0022] The present invention adopts the optical fiber grating with large dispersion value as the dispersion compensation element, and the minimum dispersion value can be less than -2000 ps / nm. The advantage is that the insertion loss is small, about 4dB. At the same time, its dispersion slope is the same as that of the G.652, G.653 and G.655 optical fibers to be compensated. Due to its large dispersion value and small insertion loss, it can solve the problem of large number of dispersion compensation optical fiber modules and amplifiers in the system, high system cost and signal-to-noise ratio after transmission when using dispersion compensation optical fiber modules for dispersion compensation. low problem. While reducing the cost of the system, the signal-to-noise ratio after system transmission is improved, and the transmission performance of the system is improved. In addition, since its dispersion slope is the same as that of the optical fiber to be compensated, the re...

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Abstract

The invention relates to a dispersion compensation method of dense wavelength division multiplexing system. The method comprises the following concrete steps: step 1, the kind of dispersion compensation fiber grating is determined according to the operating wavelength range, the fiber type and the parameters. Step 2, the dispersion numeral value and dispersion number of the dispersion compensation fiber grating are determined according to the length of multiplex section and sub multiplex section and the dispersion tolerance of light source. Step 3, the position of the dispersion compensation fiber grating is determined according to the insertion loss and the number of the dispersion compensation fiber grating and the insertion loss of line fiber. Compared with the traditional art, the method of the invention decreases the number of the dispersion compensation fiber modules and amplifiers in the dense wavelength division multiplexing system and reduces the cost of system due to the useof the dispersion compensation fiber grating to make dispersion compensation. Simultaneously, the method considers the compensation of dispersion slope and improves the transmission performance of system.

Description

technical field [0001] The present invention relates to the dispersion compensation of the dense wavelength division multiplexing system, in particular to the dispersion compensation of the dense wavelength division multiplexing system using G.652 optical fiber, G.653 optical fiber and G.655 optical fiber with a signal rate of 10Gb / s and 40Gb / s compensate. Background technique [0002] In a high-speed dense wavelength division multiplexing system, when the signal rate is 10Gb / s and above, the dispersion tolerance of the laser is very small, and the dispersion-limited distance is relatively short. For signals with a rate of 10Gb / s, the transmission distance in G.652 optical fiber is generally less than 80 kilometers. When the transmission distance is long, the cumulative dispersion introduced by the line fiber is greater than the dispersion tolerance of the laser, and the transmission performance of the system gradually deteriorates with the increase of the transmission dist...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04J14/02G02B6/34
Inventor 李红军
Owner ZTE CORP