用计算机控制扫描法写入的低偏振模色散 (PMD <1 2ps)切趾啁啾光纤光栅级联补偿了 4× 10Gbps在G 6 5 2光纤上传输 6 40km的色散 ,功率代价不大于 1 5dB ,光栅引入的损耗小于 4dB ,并研究了光源波动时系统功率代价的变化 .实验表明总的功率代价不与光栅组的数目或光栅组数目的平方根成比例关系 ,为长距离无中继在G 6 5 2光纤传输用光栅补偿色散提供了实验依据 ,光栅的时延纹波不是各组单个光栅纹波的简单叠加 ,而是与光栅的位置及EDFA增益有关 . Low Polarization Mode Dispersion (PMD <12 psps) Written by Computer-Controlled Scanning The apodized chirped fiber gratings cascade compensates for the dispersion of 4 x 10 Gbps over 6 6 km on a G 6 5 2 fiber with a power penalty of no more than 15 dB , The loss introduced by the grating is less than 4dB and the variation of system power cost when the light source fluctuates is studied.The experiment shows that the total power cost is not proportional to the number of grating groups or the square root of the grating group number, 6 5 2 Optical transmission grating compensation Dispersion provides an experimental basis, the grating delay ripple is not a simple stack of individual grating ripple, but with the grating position and EDFA gain related.