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Ultralow bending loss fibers with higher-order mode strippers
Ngoc Hai Vu1, Jin-Tae Kim, Eun-Sun Kim
1Department of Physics, Chonnam National University, Buk-gu, Gwangju, South Korea.
Abstract:
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.
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