Photonic crystal fiber design for broadband directional coupling

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A novel design for a broadband directional coupler based on a photonic crystal fiber is investigated numerically. It is shown that suitable index-depressing doping of the core regions in an index-guiding twin-core photonic crystal fiber can stabilize the coupling coefficient between the cores over an extremely broad (octave-spanning) frequency range.
Original languageEnglish
JournalOptics Letters
Issue number21
Pages (from-to)2473-2475
Publication statusPublished - 2004


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