Optimization of Equalizer Spacing Period in Multispan Fiber-Optic Lines

被引：0
|
作者：
Gorbashova, M. A. [1 ,2 ]
Starykh, D. D. [1 ]
Nanii, O. E. [1 ,3 ]
Treshchikov, V. N. [1 ,4 ]
Chebykin, I. P. [1 ,2 ]
机构：
[1] Sci & Tech Ctr T8, Moscow 107076, Russia
[2] Natl Res Univ, Moscow Inst Phys & Technol, Dolgoprudnyi 141701, Moscow Oblast, Russia
[3] Lomonosov Moscow State Univ, Fac Phys, Moscow 119991, Russia
[4] T8 LLC, Moscow 107076, Russia
来源：
BULLETIN OF THE LEBEDEV PHYSICS INSTITUTE | 2023年 / 50卷 / SUPPL 10期
关键词：
fiber-optic communication lines (FOCLs); erbium-doped fiber amplifier (EDFA); gain ripple; ripple penalty; equalizer; FOCL optimization;
D O I：
10.3103/S1068335623220025
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We study statistics of signal power spectrum ripple in a chain of erbium-doped fiber amplifiers (EDFAs). It is found that allowance for the statistical properties of EDFA gain ripple can markedly increase the accuracy of estimating the magnitude of spectrum ripple of a multichannel signal (by 4 dB in a chain of five EDFAs). By analyzing the simulation results for various configurations of fiber-optic communication lines (FOCLs), an optimal equalizer spacing period is estimated. It is shown that the signal quality deterioration in a FOCL caused by the EDFA gain ripple depends on the number of spans between devices flattening the signal spectrum, and on statistical characteristics of gain spectrum ripple of the used EDFAs; however it is practically independent of the number of spectrum equalizing sections, signal parameters, and span length. The simulation results are used to construct a model for calculating the penalty from accumulated EDFA ripple. An algorithm is proposed for estimating the penalty, applicable for an arbitrary FOCL configuration with known statistics of EDFA accumulation ripple.
引用
收藏
页码：S1146 / S1155
页数：10
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