Design of high-index broken-ring-based all-solid photonic bandgap fibers
Design of high-index broken-ring-based all-solid photonic bandgap fibers
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高折射率断环全固态光子带隙光纤设计
DOI：
10.7498/aps.60.064212
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发表时间：
2011-06
影响因子：
1
通讯作者：
Wang Ai-Min
中科院分区：
文献类型：
--
作者：
Li Yan-Feng;Hu Xiao-Kun;Wang Ai-Min
设计了基于断环结构的全固光子带隙光纤,其背景材料为熔石英而断环结构由若干掺杂的高折射率介质柱构成.利用平面波展开法得到的态密度图和布洛赫模场分布表明，这种光纤的高阶带隙可以被工程化和展宽。其原理是包层中的高折射率棒的LP模的方位和径向阶数都可以通过断环来控制。研究表明,断环中的介质柱数目决定了受影响最小的一组线偏振模式的最高角向阶数,而带隙宽度受介质柱尺寸影响很大.利用该高阶带隙可以设计出中心波长为800 nm和1550 nm、传输范围分别为488 nm和944 nm的全固态光子带隙光纤，其传输窗口具有典型的正常-零-反常色散特性。
The design of all-solid photonic bandgap fibers based on a high-index broken ring is investigated, where the background material is silica and the broken ring consists of several individual high-index rods. Density of states maps and Bloch mode field distributions obtained by plane wave expansion method show that a high-order bandgap in such fibers can be engineered and broadened. The principle is that both the azimuthal and the radial orders of the LP modes of the high-index rods in the cladding can be controlled by the broken ring. It is demonstrated that the highest azimuthal order of the group of less affected LP modes is determined by the rod number and the bandgap width is largely affected by the rod size. The high-order bandgap can be used to design all-solid photonic bandgap fiber with broad transmission ranges of 488 nm and 944 nm for a center wavelength of 800 nm and 1550 nm, respectively, and the transmission window features the typical normal-zero-anomalous dispersion profile.