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In view of dispersion compensating in multiple wavebands at the same time, this paper proposes a novel multi-waveband dispersion compensating fiber (DCF) based on hybrid photonic crystal fiber (PCF). The proposed fiber can compensate multiple wavebands at the same time. The mechanism of the multi-waveband dispersion compensation is analyzed, and the different material-filled structure is discussed numerically. The simulation results show that the multi-waveband DCF can compensate multiple wavelengths at the same time. By a reasonable design, this fiber can replace the multi-dispersion compensating system composed by cascaded multiple devices, and minimize the loads of the system in an efficient way. 相似文献
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由于高压隧洞的常规设计概念在经济上存在不合理性,谢家沟电站高压引水隧洞衬砌结构设计引入了围岩承载的新概念,根据目前国内外水工高压隧洞衬砌结构设计常用的"挪威准则"、"最小地应力准则"和工程类比,谢家沟电站高压引水隧洞可考虑不衬砌,取得了良好的经济效益。谢家沟电站高压引水隧洞衬砌结构设计的概念和方法可供类似工程参考。 相似文献