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    • 125. 发明授权
    • Raman amplification method, Raman amplification pumping unit, and WDM optical communication system
    • 拉曼放大法,拉曼放大泵浦单元和WDM光通信系统
    • US07075710B2
    • 2006-07-11
    • US10358144
    • 2003-02-05
    • Masayuki Inoue
    • Masayuki Inoue
    • H04B10/12H01S3/00
    • H01S3/302H01S3/094096H01S3/1312
    • This invention provides a Raman amplification method and the like having a structure which can properly adjust a pumping light power in accordance with a loss change in signal light and can easily flatten a gain spectrum. In the Raman amplification method according to this invention, part of Raman-amplified propagating light is branched by an optical branching device. Of the branched propagating light, at least light components having two predetermined wavelengths are demultiplexed by an optical demultiplexer. The powers of the light components having the two wavelengths are detected. The amounts of loss changes in the light components having the two wavelengths and the slope of an approximate line representing the correlation between the wavelength and the amount of loss change are obtained on the basis of these powers. The optical power of each pumping channel output from an associated one of a plurality of pumping light sources included in a Raman amplification pumping unit is adjusted on the basis of the amount of loss change and the slope of the approximate line.
    • 本发明提供一种拉曼放大方法等,其结构可以根据信号光的损耗变化适当地调节抽运光功率,并且可以容易地使增益光谱平坦化。 在根据本发明的拉曼放大方法中,部分拉曼放大的传播光被光分支器件分支。 在分支传播光中,至少具有两个预定波长的光分量被光解复用器解复用。 检测具有两个波长的光分量的功率。 基于这些功率获得具有两个波长的光分量中的损耗变化量和表示波长与损耗变化量之间的相关性的近似线的斜率。 基于损耗变化量和近似线的斜率来调整从包括在拉曼放大泵送单元中的多个泵浦光源中的相关联的一个泵浦光源输出的每个泵浦通道的光功率。