Journal of the Optical Society of Korea

Optical Society of Korea (한국광학회)
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Design of Tunable Flat-top Bandpass Filter Based on Two Long-period Fiber Gratings and Core Mode Blocker

  • Bae, Jin-Ho (Department of Ocean System Engineering, Jeju National University) ;
  • Bae, Jun-Kye (Fiber Access 3 Team, LG-Ericsson CO., Ltd. LG R&D Complex) ;
  • Lee, Sang-Bae (Nanophotonics Research Center, KIST)
  • Received : 2011.03.23
  • Accepted : 2011.05.18
  • Published : 2011.06.25
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Abstract

We propose a tunable flat-top bandpass filter to pass light in a customized wavelength band by using long-period fiber gratings (LPFG) structure. The LPFG structure is composed of a core mode blocker in between two LPFGs. The bandpass spectrum of the proposed structure is obtained in overlapped wavelength band of two LPFGs operating on the same modes. To analyze the properties, we introduce a mathematical matrix model for the structure. We theoretically demonstrate flexibility of the flat-top bandpass filter with various bandwidths.

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References

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