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Optimal Bandwidth for Distributed Multi-Pump Raman Amplifier Based on Hybrid Genetic Algorithm 下载免费PDF全文
Based on a hybrid genetic algorithm, the bandwidth for distributed multi-pump Raman amplifier (DMRA) is optimized. Optimal results show that signal bandwidth △γ can be evidently broadened by means of increasing the number of pumps, △γ decreases with the increase of Raman gain and with the improvement of flatness property, and the hybrid erbium-doped fibre amplifier and DMRA can availably overcome the weakness of pure DMRA. 相似文献
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The effect of distributed Raman amplification (DRA) on the optical signal to noise ratio (OSNR) of an all optical network (AON) is examined by analyzing two types of node isolated principal (NIP). Based on the parameters used in calculation, it is found that in the first case of NIP, the OSNR of a signal passing through such AON can be improved by about 8 dB compared with no DRA. Whereas in the second case of NIP, the OSNR of the signal can be reduced by 11 dB. This kind of phenomena is analyzed and attributed to the dependence of noise figure of amplification system on the way of the active amplification utilization. 相似文献
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Optimal Design of Dual-Pump Fibre-Optical Parametric Amplifiers with Dispersion Fluctuations Based on Hybrid Genetic Algorithm 下载免费PDF全文
Solutions of dual-pump fibre-optical parametric amplifiers (DP-FOPAs) with dispersion fluctuations are derived by using a matrix operator. Based on these solutions and a hybrid genetic algorithm, we have optimized threesection DP-FOPAs to increase the signal band and improve the gain uniformity. The optimizations demonstrate that when dispersion fluctuations are taken into account, the 44-nm signal band with the 0.37-dB ripple and over 14.8-dB gain can be obtained from the three-section DP-FOPA, instead of the lowest gain of -13dB with the ripple of more than 15dB from the single-section DP-FOPA. 相似文献
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应用马赫-曾德尔调制器的光微波链路建模 总被引:3,自引:4,他引:3
在考虑马赫-曾德尔调制器(MZM)的消光比、双臂驱动不平衡度等非理想特性参量对其进行细致的理论建模的基础上,建立了包括光源、双臂驱动马赫-曾德尔调制器、光传输模块、光电探测器的基本光微波链路模型,并得到双边带调制(DSB)和单边带调制(SSB)链路的全阶解析响应结果,着重分析不同调制方式下马赫-曾德尔调制器对光微波链路幅度和相位(延时)性能的影响。理论计算和数值仿真结果表明,对双边带调制链路,消光比和双臂驱动不平衡度影响链路的幅频特性而不影响相位特性,对单边带调制链路,二者同时影响链路的幅频和相频特性。理论模型和数值结果可为使用马赫-曾德尔调制器的光微波系统如光纤无线电(RoF)和光控微波波束形成网络等提供定性和定量性能分析的基础。 相似文献
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从理论与实验两方面分析了光网络节点设备光信噪比(OSNR)恶化量的测量,导出了单节点设备输出,输入侧光信噪比之差的公式。理论分析表明:节点设备输出,输入侧光信噪比之差值在一般测试条件下不能反映节点设备对光信号的影响,能作为节点设备光信噪比的恶化量来衡量设备对光信号的影响;为使测量结果能反映光节点参数对光信号的综合影响,测试系统应当满足文中给出的增益条件C=1。实验结果支持了理论分析,实验结果表明,对于C=1时光信噪比恶化量为4.5dB的光点设备,当C从3变化与0.16时,其输入、输出侧光信噪比之差从1.8dB变化到11.3dB. 相似文献
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