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Electrical domain dispersion compensation method based on dispersion curve in WDM network

A technology of dispersion curve and equalization method, which is applied in the field of EDC receiver equipment and channel dispersion equalization, and can solve problems such as rising costs

Inactive Publication Date: 2009-06-03
BEIJING UNIV OF POSTS & TELECOMM
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AI Technical Summary

Problems solved by technology

Single-channel electrical dispersion equalization can save 30% of the cost, but in the case of multiple channels, if single-channel equalization is used, the cost will gradually increase with the number of opened channels

Method used

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  • Electrical domain dispersion compensation method based on dispersion curve in WDM network
  • Electrical domain dispersion compensation method based on dispersion curve in WDM network
  • Electrical domain dispersion compensation method based on dispersion curve in WDM network

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Embodiment Construction

[0005] The purpose of the present invention can be achieved in the following ways.

[0006] The design concept of the present invention can be summed up as: two points and one line, dynamic adjustment. That is: dynamically equalize the dispersion of two channels in the WDM system, and estimate the dispersion values ​​of the remaining channels according to the obtained two dispersion values, so as to realize dynamic equalization of all channels.

[0007] The specific technical scheme is as follows:

[0008] plan 1:

[0009] The receiver of the invention adopts EDC technology to equalize channel dispersion. For a WDM system with N(1, 2, . . . , N-1, N) channels, the receiver dynamically equalizes the first channel and the Nth channel. For the remaining channels, use the look-up table method to obtain indirect dynamic equalization.

[0010] Scenario 2:

[0011] The receiver of the invention adopts EDC technology to equalize channel dispersion. For a WDM system with N(1, 2, ...

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Abstract

The invention relates to an electrical domain dispersion compensation method based on dispersion curves in the WDM network. Electronic dispersion compensation (EDC) technology belongs to a technology that the dispersion problem of optical transmission is treated by mature digital signal processing method. In the WDM system, a traditional one-to-one EDC equalizer is adopted. As more channels are used, the cost of the system is increased gradually; and in aspect of deployment, due to an EDC module, the difficulty of design is increased. TP-EDC receiver provided by the invention avoids the disadvantages. The receiver has function of all of the channels of dynamic equilibrium WDM system. The implementation method is simple, and the deployment is flexible. The method is applicable for the construction of brand new network and the interconnection between new and old optical-fiber networks. The method is also applicable in the environment of crossing a plurality of optical fibers. Due to the key technology of the method, the method is applicable in ROADM network environment, and the method can effectively solve the residual dispersion problem.

Description

technical field [0001] The invention belongs to a dispersion equalization method in the field of optical fiber communication, especially a channel dispersion equalization method for unifying multiple wavelengths (multi-channels) in the electrical domain, and according to this method, an EDC receiver is designed Equipment: Two-Point EDC (Two-Point EDC, TP-EDC). Background technique [0002] At present, the wavelength division multiplexing optical network has begun to be commercially used on a large scale. For the dispersion accumulated in optical fiber transmission, there are many types of equalizers, and the present invention mainly relates to electronic dispersion compensation (EDC). Dispersion compensating fiber and chirped fiber grating are technologies with a high degree of commercialization. However, the DCM based on DCF has a large volume. Not only does DCF have a large loss, but also its dispersion cannot be adjusted. In addition, the problem of slope compensation h...

Claims

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Application Information

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IPC IPC(8): H04B10/18H04J14/02H04B10/2525
Inventor 乔耀军项飞纪越峰
Owner BEIJING UNIV OF POSTS & TELECOMM
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