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An Adaptive Dispersion Compensation Method

A dispersion compensation and self-adaptive technology, applied in the field of optical communication, can solve the problems of rough adjustment and insufficient comprehensiveness, and achieve the effect of ensuring reliable transmission and improving intelligence

Inactive Publication Date: 2011-11-30
ZTE CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The patent considers more carefully, but it is still not comprehensive enough. Once an alarm occurs, it is inappropriate to perform rough adjustment.
In addition, it does not involve how to perform fine-tuning, whether to exclude local optimal traps, etc.

Method used

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Embodiment Construction

[0030] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0031] Such as figure 2 Shown is the flowchart of the method of the present invention, specifically comprises the following steps:

[0032] Step 1: Coarse dispersion adjustment. Coarsely adjust the dispersion of the tunable dispersion compensator, and at the same time check whether the bit error count is valid, if so, go to the next step; otherwise, continue to roughly adjust the dispersion of the tunable dispersion compensator;

[0033] This step is suitable to be carried out at the initial stage of dispersion adjustment, and each time the dispersion adjustment amount is relatively large, the purpose is to quickly find the effective state of the error count of the forward error correction unit. Generally, the dispersion adjustment range of the dispersion compensator is above 1000 ps / nm, so the interval of the coarse dispersion adjustment in this step is s...

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Abstract

The invention relates to a self-adaptive chromatic dispersion compensation method used for a wavelength-division multiplex system. The method comprises the following steps: firstly, coarse adjustment is carried out to the chromatic dispersion of an adjustable chromatic dispersion compensator, and the situation that whether error code counting is efficient or not is detected simultaneously; if the error code counting is efficient, the performance optimization of a receiver is prohibited; fine adjustment is carried out to the chromatic dispersion of the adjustable chromatic dispersion compensator, and the situation that whether the error code rate is smaller than a set threshold value or not is detected simultaneously; if the error code rate is smaller than the set threshold value, the performance of the receiver is optimized after the fine adjustment of the chromatic dispersion of the adjustable chromatic dispersion compensator is completed every time, and chromatic dispersion is optimized; and finally, the performance of the receiver is optimized. By the invention, the defect of falling into local optimization when the chromatic dispersion of a system is adjusted is overcome, coordination processing is carried out to the adjustment of the chromatic dispersion of the system and the optimization of the receiver, the change of the chromatic dispersion of the system can be tracked, the chromatic dispersion can be dynamically adjusted, the self-adaptive chromatic dispersion compensation of the residual chromatic dispersion of a passage in a high-speed optical communication system is completed, the intelligence of the self-adaptive chromatic dispersion compensation is greatly enhanced, and the reliable transmission of a wavelength-division system is ensured.

Description

technical field [0001] The invention relates to the field of optical communication, in particular to an adaptive dispersion compensation method for a wavelength division multiplexing system. Background technique [0002] The 10Gb / s wavelength division multiplexing system does not need to configure the tunable dispersion compensator, but the 40Gb / s wavelength division multiplexing system has a small dispersion tolerance, and the tunable dispersion compensator becomes one of the key components of the system transmission. ITU-T Recommendation G.667, "Characteristics of adaptive chromatic dispersioncompensators", provides methods for adaptive dispersion compensation, including single-channel adaptive dispersion compensation and multi-channel adaptive dispersion compensation for wavelength division multiplexing systems, such as figure 1 , is a schematic block diagram of single-channel adaptive dispersion compensation for a wavelength division multiplexing system. The receiver pro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/18H04J14/02H04B10/2525
Inventor 沈百林李红军
Owner ZTE CORP
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