4.6 Article

Optical microfiber coupler for broadband single-mode operation

Journal

OPTICS EXPRESS
Volume 17, Issue 7, Pages 5273-5278

Publisher

OPTICAL SOC AMER
DOI: 10.1364/OE.17.005273

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Funding

  1. Engineering and Physical Sciences Research Council UK (EPSRC)
  2. Royal Society (London, UK)
  3. Korean Government [KRF-2008-357-C00040]
  4. EPSRC [EP/F001134/1] Funding Source: UKRI
  5. Engineering and Physical Sciences Research Council [EP/F001134/1] Funding Source: researchfish

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We present a broadband single-mode bi-conical microfiber coupler (MFC) with a specifically designed transition region that effectively suppresses any higher-order modes present at the input fiber and provides efficient power splitting into the fundamental mode at the two output ports. As a practical example, single-mode 3-dB splitting operation over a broad spectral window (400 similar to 1700 nm) was demonstrated for a very thin taper waist (similar to 1.5 mu m) MFC made from conventional telecom optical fibers. (C) 2009 Optical Society of America

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