Fast self-adaptive dispersion compensation method in 40Gbps DWDM (dense wavelength division multiplexing) system

A dispersion compensation and self-adaptive technology, applied in transmission systems, electromagnetic wave transmission systems, electrical components, etc., can solve problems such as local optimum, low efficiency, and long time consumption, so as to improve efficiency, reduce time, and avoid local optimum Effect
CN103188017AActive Publication Date: 2013-07-03FENGHUO COMM SCI & TECH CO LTD
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Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
FENGHUO COMM SCI & TECH CO LTD
Publication Date
2013-07-03

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Abstract

The invention relates to a fast self-adaptive dispersion compensation method in a 40Gbps DWDM (dense wavelength division multiplexing) system. The fast self-adaptive dispersion compensation method specifically comprises the following steps: step A) delaying coarse regulation of an interferometer DLI (delay line interferometer) by an OTU (optical transport unit) receiver; step B) performing dispersion coarse regulation through a dichotomic method; step C) performing fine regulation through a TDC (time-to-digital converter); step D): optimizing the DLI through the receiver; and step E) monitoring through the TDC, judging whether dispersion changes or not by FEC (forward error control) error correction counting or warning and entering step B) or C) if the dispersion changes. According to the method disclosed by the invention, a coarse regulation point is fast found by using the dichotomic method, the optimal dispersion is found by adopting a mid-point method after entering the fine regulation step, the dispersion compensation time is effectively reduced, the efficiency is improved, and the defects of local optimization can be simultaneously avoided.
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Description

technical field

[0001] The invention relates to a 40Gbit / s DWDM long-distance transmission system, in particular to a fast adaptive dispersion compensation method in the 40Gbps DWDM system. In particular, it refers to the fast adaptive dispersion compensation method for a single channel in a 40Gbps DWDM system. Background technique

[0002] At present, with the rapid development of broadband networks, the demand for massive data services has led to the development and research of various low-cost, high-speed optical fiber transmission systems. The optical fiber transmission network is experiencing from 10Gb / s system to With the leap from 40Gb / s system to 100Gb / s system, the transmission distance is also greatly increased. The impact of fiber dispersion on the transmission performance of DWDM (Dense Wavelength Division Multiplexing, Dense Wavelength Division Multiplexing) system is becoming more and more serious, which mainly limits The transmission distance of the system. ...

Claims

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