Journal of the Optical Society of Korea

  • 제9권4호
  • /
  • Pages.135-139
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  • 2005
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  • 1226-4776(pISSN)
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  • 2093-6885(eISSN)
한국광학회 (Optical Society of Korea)
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Add/drop Filter for CWDM Systems Using Side-coupled Long-period Fiber Gratings

  • Chan Florence Y. M. (Department of Information and Communications Gwangju Institute of Science and Technology (GIST)) ;
  • Kim Myoung Jin (Department of Information and Communications Gwangju Institute of Science and Technology (GIST)) ;
  • Lee Byeong Ha (Department of Information and Communications Gwangju Institute of Science and Technology (GIST))
  • 투고 : 2005.11.23
  • 발행 : 2005.12.01
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초록

We demonstrate a simple and effective wavelength-tunable add/drop filter suitable for coarse wavelength division multiplexing (CWDM) systems. The filter consists of two fibers in contact side by side, with identical long-period fiber gratings (LPG) in each fiber. The LPG couples the power in the fundamental core mode to one of the cladding modes, which is then coupled to the same order cladding mode in the other fiber through evanescent-field coupling between two fibers. Finally, the cladding mode in the second fiber is coupled to its core mode with the help of the other LPG. With an optimal longitudinal offset distance of 10 em, coupling efficiency as high as -1.68 dB and side lobes smaller than -24 dB were experimentally obtained. The experimental results agreed well with the theoretical ones. The operating wavelength of the proposed add/drop filter was tunable by varying the temperature. The temperature sensitivity was measured to be -0.43 nm/$^{\circ}C$.

키워드

참고문헌

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피인용 문헌

  1. Temperature Stabilization of Group Index in Silicon Slotted Photonic Crystal Waveguides vol.15, pp.4, 2011, https://doi.org/10.3807/JOSK.2011.15.4.398