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Properties of all-solid square-lattice photonic bandgap fibres are studied for the first time to the best of our knowledge. Using the plane-wave expansion method and finite element method, we investigate the mode, effective area, confinement loss and dispersion of such fibres. The simulation results demonstrate that the proposed effective mode area of all-solid square-lattice photonic bandgap fibres is 1.25 times larger than triangular-lattice ones and the confinement loss of the fibres is no more than 0.1 dB/m within the bandgap. 相似文献
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本文介绍Mark-Ⅲ数字波面干涉仪的基本原理、性能以及对实时干涉图的两种处理方法(位相法和ZAPP法)。列举了四组实验数据,给出该仪器在现有环境条件下的实际重复性指标:1.1λ/100p-v(λ=0.6328μm,p-v峰谷值)。并就环境条件的影响及控制、有效提高测量精度发表了一些看法。 相似文献
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