Pryamikov Andrey D, Biriukov Alexander S, Kosolapov Alexey F, Plotnichenko Victor G, Semjonov Sergei L, Dianov Evgeny M
Fiber Optics Research Center of Russian Academy of Sciences, Moscow, Russia.
Opt Express. 2011 Jan 17;19(2):1441-8. doi: 10.1364/OE.19.001441.
We present a numerical and experimental demonstration of a waveguide regime in a broad band spectral range for the hollow core microstructured optical fibers (HC MOFs) made of silica with a negative curvature of the core boundary. It is shown that HC MOFs with the cladding consisting only of one row of silica capillaries allows to guide light from the near to mid infrared despite of high material losses of silica in this spectral region. Such result can be obtained by a special arrangement of cladding capillaries which leads to a change in the sign of the core boundary curvature. The change in the sign of the core boundary curvature leads to a loss of simplicity of boundary conditions for core modes and to "localization" and limitation of their interaction with the cladding material in space. Such HC MOFs made of different materials can be potential candidates for solving problem of ultra high power transmission including transmission of CO and CO2 laser radiation.
我们给出了一种由具有负曲率芯边界的二氧化硅制成的空心微结构光纤（HC MOF）在宽带光谱范围内波导机制的数值和实验演示。结果表明，仅由一排二氧化硅毛细管组成包层的HC MOF能够在近红外到中红外波段实现光导，尽管二氧化硅在该光谱区域存在较高的材料损耗。这一结果可通过包层毛细管的特殊排列获得，这种排列会导致芯边界曲率符号的改变。芯边界曲率符号的改变导致了芯模边界条件的简单性丧失，并使其与包层材料在空间中的相互作用“局部化”和受到限制。这种由不同材料制成的HC MOF可能是解决超高功率传输问题（包括CO和CO2激光辐射传输）的潜在候选方案。
