Vu Ngoc Hai, Kim Jin-Tae, Kim Eun-Sun, Jung Chang-Hyun, Lee Kyung-Goo, Hwang In-Kag
Department of Physics, Chonnam National University, Buk-gu, Gwangju, South Korea.
Opt Express. 2010 Sep 13;18(19):19456-61. doi: 10.1364/OE.18.019456.
We propose and demonstrate bend-insensitive fibers equipped with higher-order mode strippers. The mode stripper is realized by filling a section of air holes with epoxy to attenuate any higher-order modes that are excited at fiber junctions and are confined by the air holes surrounding the core. We found that the higher-order modes are well suppressed with 5 cm-long epoxy columns. An ultralow bending loss of 0.025 dB/turn at a bend diameter of 10 mm, together with single-modeness, is experimentally demonstrated in a bend-insensitive fiber with six air holes 16 μm in diameter.
我们提出并展示了配备高阶模剥离器的低弯曲敏感性光纤。通过用环氧树脂填充一段气孔来实现模剥离器，以衰减在光纤接头处激发并被纤芯周围的气孔限制的任何高阶模。我们发现，5厘米长的环氧树脂柱能很好地抑制高阶模。在一种具有六个直径为16μm气孔的低弯曲敏感性光纤中，通过实验证明了在弯曲直径为10mm时具有0.025dB/圈的超低弯曲损耗以及单模特性。
