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1. 发明授权

US07006280B2 Multi-stage filtered optical amplifier 有权
标题翻译：多级滤波光放大器
公开(公告)号：US07006280B2
公开(公告)日：2006-02-28
申请号：US10726458
申请日：2003-12-03
申请人： Kao-Yang Huang , John R. Costelloe , Richard Williams
发明人： Kao-Yang Huang , John R. Costelloe , Richard Williams
IPC分类号： H04B10/12
CPC分类号： H01S3/06754 , H01S3/10023 , H01S2301/04
摘要： A multistage amplifier is disclosed for amplifying light over a wavelength band. A first and second span of amplifying fiber are optically coupled and a gain flattening filter (GFF) in-line with one of two spans of amplifying fiber is provided for attenuating certain wavelengths of amplified light. A first gain spectral response of the first and second spans of amplifying fiber including the GFF are measured over the wavelength band, and the shape of a ripple that oscillates as a function of wavelength in the form of a plurality of peaks or maxima and valleys in the form of minima occur at a plurality of different wavelengths, each different wavelength corresponding to a different channel. A second filter is provided finishing or compensating filter having a second spectral response that has a second plurality of peaks in the form of maxima and valleys in the form of minima is provided. The second filter is designed so that the second spectral response is absent at least 50% of four most predominant peaks or valleys at channels where peaks or valleys, respectively, were present in the first spectral response. The maximum ripple amplitude in the second spectral response is less than a maximum ripple amplitude in the first gain spectral response. This arrangement lessens unwanted effects of systematic error occurring when filters having similar ripple responses with wavelength are cascaded.
摘要翻译：公开了一种用于在波长带上放大光的多级放大器。放大光纤的第一和第二跨度是光学耦合的，并且提供与两个放大光纤的跨距之一成对的增益平坦化滤光器（GFF），用于衰减某些波长的放大光。在波长带上测量包括GFF的放大光纤的第一和第二跨度的第一增益光谱响应，以及以多个峰值或最大值和谷值形式的波长的函数振荡的纹波的形状最小的形式出现在多个不同的波长处，每个不同的波长对应于不同的通道。提供了第二滤光器，其具有第二光谱响应的精加工或补偿滤光器，所述第二光谱响应具有以最小值形式的最大值和谷值形式的第二多个峰值。第二个滤光片被设计成使得第二光谱响应在第一光谱响应中分别存在峰或谷的通道处不存在四个最主要的峰或谷中的至少50％。第二光谱响应中的最大纹波幅度小于第一增益光谱响应中的最大纹波幅度。当具有波长相似的波纹响应的滤波器级联时，这种布置减少了发生的系统误差的不期望的影响。

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