Holey fibers for evanescent field devices
Holey fibers for evanescent field devices
复制标题
用于倏逝场器件的多孔光纤
DOI：
10.1109/cleo.1999.834024
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发表时间：
1999
期刊：
影响因子：
--
通讯作者：
P. Bennett
中科院分区：
文献类型：
--
作者：
T. Monro;D. Richardson;P. Bennett
仅提供摘要形式。在多孔光纤（HF）中，包层由沿其长度沿着的孔阵列形成，并且芯仅仅是没有孔。由于纤芯和包层之间的有效体积平均折射率差，HF引导光。这些空穴为利用光与气体和液体通过倏逝场效应的相互作用提供了新的机会。例如，气体中污染物的浓度可以使用当光在一定波长范围内传播通过气体时发生的吸收来确定，并且HF提供了一种替代方案，其自然地提供了极长光程长度的可能性。为了评估高频的倏逝场设备，如气体传感器的适用性，这是至关重要的是要知道的模场与孔的重叠的幅度，在这里，我们提出了我们认为是第一个这样的计算。
Summary form only given. In a holey fiber (HF), the cladding is formed by an array of holes which run along its length, and the core is simply the absence of a hole. HFs guide light because of the effective volume average index difference between the core and the cladding. The holes provide new opportunities for exploiting the interaction of light with gases and liquids through evanescent field effects. For example, the concentration of pollutants in a gas can be determined using the absorption which occurs as light propagates through the gas for a range of wavelengths, and HFs offer an alternative which naturally provide the possibility of extremely long optical path lengths. To assess the suitability of HFs for evanescent field devices such as gas sensors, it is crucial to know the magnitude of the overlap of the modal field with the holes, and here we present what we believe to be the first such calculations.