Ghosh Prasenjit, Sarkar Somenath
Appl Opt. 2016 Jan 20;55(3):491-7. doi: 10.1364/AO.55.000491.
Based on a simple but accurate semivectorial solution of Helmholtz's equation by the finite difference method devised with a mode-field convergence technique, we have shown an interesting and significant effect showing an almost ultraflat zero group velocity dispersion in photonic crystal fiber when the holes of the first ring of the fiber are filled with water. Crosschecking our results with earlier results involving a deeply involved multipole method for the central core of photonic crystal fiber filled with water and fused silica, our observation in the case of filling the first ring holes with water reveals potential information in studies of supercontinuum generation.
基于一种通过采用模场收敛技术设计的有限差分法对亥姆霍兹方程进行的简单而精确的半矢量求解，我们展示了一种有趣且重要的效应：当光子晶体光纤第一环的孔被水填充时，该光纤中呈现出几乎超平坦的零群速度色散。通过将我们的结果与早期涉及用于填充水和熔融石英的光子晶体光纤中心芯的复杂多极方法的结果进行交叉核对，我们关于用水填充第一环孔的情况的观察揭示了超连续谱产生研究中的潜在信息。
