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Estimation apparatus and method for optimum dispersion compensation of long-distance WDM system

A dispersion compensation and evaluation device technology, which is applied in the transmission system, wavelength division multiplexing system, and elimination of distortion/dispersion, etc., can solve the problems of limited residual dispersion test accuracy and difficult theoretical calculation of dispersion compensation, which are factors affecting the dispersion compensation effect. Achieve the effect of saving operation and improving technical level

Inactive Publication Date: 2011-10-26
ZTE CORP
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Problems solved by technology

[0018] The purpose of the present invention is to provide an evaluation device and method for optimal dispersion compensation of a long-distance WDM system, which mainly solves the problem that the theoretical calculation of dispersion compensation in the existing method is difficult to take into account various factors that affect the dispersion compensation effect and the residual dispersion test. Technical issues with limited precision to achieve the evaluation of optimal dispersion compensation of the system

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  • Estimation apparatus and method for optimum dispersion compensation of long-distance WDM system
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  • Estimation apparatus and method for optimum dispersion compensation of long-distance WDM system

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Embodiment Construction

[0043] see figure 2 , which is a structural block diagram of an evaluation device for optimal dispersion compensation of a long-distance WDM system according to the present invention. As shown in the figure: it consists of adjustable dispersion compensation module A, adjustable attenuation unit B, optical power monitoring unit C, bit error testing unit D and management control and data processing center E: where:

[0044] The adjustable chromatic dispersion compensation module A receives commands from the management control and data processing center to adjust the additional chromatic dispersion of the multiplexing section of the system;

[0045] The adjustable attenuation unit B receives commands from the management control and data processing center to adjust the input optical power of the OTU line side;

[0046] The optical power monitoring unit C monitors the input optical power of the OTU line side, and reports to the management control and data processing center;

[0...

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Abstract

This invention provides a best evaluation device for the dispersion compensation of a long distance WDM system composed of an adjustable dispersion compensation module, an adjustable attenuation unit, an optical power monitor unit, an error code test unit and a management and control and data process center, in which, after the device is accessed into the WDM system, it can realize the best evaluation to dispersion compensation of the long distance WDM system.

Description

Technical field: [0001] The invention relates to the evaluation of optimal dispersion compensation in the field of optical communication, and relates to an evaluation device and method for optimal dispersion compensation of a long-distance WDM (Wavelength Division Multiplexing, wavelength division multiplexing technology) system. Background technique: [0002] In recent years, with the rapid development of WDM technology in the direction of high-speed, ultra-long, and high-density, the problem of dispersion compensation in WDM systems is very prominent. For example, the typical dispersion tolerance of 10Gb / s electro-absorption modulated NRZ signal is 800-1000ps / nm, while the typical dispersion tolerance of 40Gb / s is only 60ps / nm. The dispersion tolerance of the system is very small. Accurate dispersion compensation needs to be considered for distance transmission. Dispersion compensation methods are divided into pre-compensation, line compensation, and post-compensation acc...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/18H04J14/02H04B10/075H04B10/2513
Inventor 沈百林
Owner ZTE CORP