Ha Woosung, Lee Sejin, Kim Jongki, Jeong Yoonseob, Oh Kyunghwan, Kobelke Jens, Schuster Kay, Unger Sonja, Schwuchow Anka, Kim Jun Ki
Institute of Physics and Applied Physics, Yonsei University, 262 Seongsanno, Seodaemun-gu, Seoul 120-749, Korea.
Opt Express. 2010 Sep 27;18(20):20918-25. doi: 10.1364/OE.18.020918.
We demonstrate a micro-structured aperture made of a unique hollow triangular-core fiber (HTCF) that consists of a central air hole, a high-index hollow triangular core, and silica cladding for all-fiber novel beam shaping. Detailed fabrication processes to embed a hollow triangular structure into a cylindrical optical fiber are described and unique diffraction patterns out of the HTCF for monochromatic light are analyzed both experimentally and theoretically. Fourier-optic analysis combined with guided mode calculation was pursued to interpret experimental patterns in terms of the beam propagation distance.
我们展示了一种由独特的空心三角形纤芯光纤（HTCF）制成的微结构孔径，该光纤由一个中心气孔、一个高折射率空心三角形纤芯和用于全光纤新型光束整形的二氧化硅包层组成。描述了将空心三角形结构嵌入圆柱形光纤的详细制造工艺，并通过实验和理论分析了HTCF输出的单色光的独特衍射图案。采用傅里叶光学分析与导模计算相结合的方法，根据光束传播距离来解释实验图案。
