论文部分内容阅读
导出了光信噪比与光节点数量 ,掺铒光纤放大器 (EDFA)噪声系数 ,增益的关系公式 ,并分析了光节点数目与EDFA特性参数的关系。分析表明 ,当光节点中EDFAs设置成输入EDFA补偿节点损耗 ,输出EDFA补偿光纤损耗的工作方式时 ,要保持光信号的信噪比不低于 2 0dB ,则光节点数目最多为 19左右 ,改善EDFA的噪声系数对提高光节点数目的作用不大 ;如降低光节点内部损耗 ,优化两个EDFA的增益 ,可以最大程度地提高网络节点规模 ,网络节点数最大可达 5 6。
The relationship between the optical signal-to-noise ratio and the number of optical nodes, the noise figure and the gain of an erbium-doped fiber amplifier (EDFA) is derived. The relationship between the number of optical nodes and the EDFA parameters is also analyzed. Analysis shows that when the optical node EDFAs set to enter EDFA compensation node loss, output EDFA fiber loss compensation work, to maintain the optical signal to noise ratio of not less than 20dB, then the number of optical nodes up to about 19, to improve The noise figure of EDFA has little effect on increasing the number of optical nodes. For example, reducing the internal loss of optical nodes and optimizing the gain of the two EDFA can maximize the size of network nodes and the maximum number of network nodes is 56.