Dynamic gain balancing method and optical transmission system therewith

A dynamic gain and transmission system technology, applied in the field of optical transmission system, can solve the problems of deteriorating WDM system OSNR performance, limiting system target transmission distance, etc.

Inactive Publication Date: 2004-04-21
FENGHUO COMM SCI & TECH CO LTD
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Problems solved by technology

The introduction of lossy components degrades the OSNR performance of the

Method used

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  • Dynamic gain balancing method and optical transmission system therewith
  • Dynamic gain balancing method and optical transmission system therewith
  • Dynamic gain balancing method and optical transmission system therewith

Examples

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Embodiment Construction

[0031] figure 1 A preferred embodiment of a lossless dynamic gain equalizer (LF-DGE) is shown. Essentially, it is a multi-wavelength Raman pump module that works in reverse pumping mode. It has no amplification itself, nor does it have a gain equalization function. Only together with the transmission fiber in front of it can a complete distributed Raman amplifier be formed. Plays the role of Dynamic Gain Equalization (DGE) by dynamically changing the gain spectrum of the amplifier.

[0032] Lossless Dynamic Gain Equalizer (LF-DGE) module 100 consists of LF-DGE control circuit 10, multi-wavelength pump laser array 20, pumping / signal multiplexer 30, and input / output interface of optical signal and electrical signal input / output interface, etc.

[0033] The function of the LF-DGE control circuit 10 is to control the output power of each pump laser in the multi-wavelength pump laser array 20 and exchange information with an optical performance monitor (OPM). Based on the data...

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Abstract

A method protecting wavelength channel used in denseness wavelength division multiplex system of multiway multiplex system and its device, the feature is: in the dense wavelength division multiplex system, the multiplexer (MUX) adds and connects appending multiplexer, the outputting light signal of the multiplex ( MUX ) and the output of backup optics turnable unit (OTU) combine to output through the appending multiplexer, the appending multiplexer and relevant demultiplexer (DEMUX) take optics turnable unit (OTU) as backup protecting unit for system wavelength channel, the above statement demultiplexer ( DEMUX ) can add and connect appending demultiplexer to receive the signal from appending multiplexer, the appending multiplexer and appending demultiplexer take the optics turnable unit (OTU) as backup protecting unit for system wavelength channel. This invention has high utilization for wavelength resources.

Description

technical field [0001] The present invention relates to an optical transmission system, more specifically, a lossless dynamic gain equalization and channel power equalization method for the optical transmission system and a wavelength division multiplexing (WDM) optical transmission system using the method. Background technique [0002] With the explosive growth of telecommunication services, especially data services represented by IP, people's demand for telecommunication transmission capacity is increasing day by day. Currently, wavelength division multiplexing (WDM) technology is usually used to achieve rapid network expansion. Wavelength division multiplexing (WDM) technology is actually a multi-channel optical transmission technology, that is, each light of different wavelengths carries a channel with a specific bit rate, and then multiplexes them into an optical signal in a single optical fiber transmission. When receiving, use the optical wave splitting device to dem...

Claims

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Application Information

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IPC IPC(8): H04J14/02
Inventor 刘贤炳杨铸张强谢秋红席申娥夏珣
Owner FENGHUO COMM SCI & TECH CO LTD
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