Suppression Method of Cladding Modes in Micro-Structured Fiber Using for FTTH Technology

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Abstract: We propose and demonstrate bendinsensitive 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 5,5 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 diameter.