Dynamic Passband Filter using Converging Wave in Volume Holographic Diffraction Grating

부피형 홀로그래픽 회절격자에서 수렴파를 이용한 능동 대역 필터

  • An, Jun-Won (School of Electrical and Electronics Eng., Chungbuk National University) ;
  • Nam, Ki-Won (School of Electrical and Electronics Eng., Chungbuk National University) ;
  • Kim, Nam (School of Electrical and Electronics Eng., Chungbuk National University) ;
  • Lee, Kwon-Yeon (Dept. of Electrical Eng., Sunchon National University) ;
  • Nam, Sang-Sig (ETRI)
  • 안준원 (忠北大學校 電氣電子工學部) ;
  • 남기원 (忠北大學校 電氣電子工學部) ;
  • 김남 (忠北大學校 電氣電子工學部) ;
  • 이권연 (順天大學校 電子工學科) ;
  • 남상식 (韓國電子通信硏究院)
  • Published : 2000.12.01

Abstract

A new dynamic passband filter enable to control the bandwidth using converging readout beam in photorefractive diffraction grating with high-efficiency is proposed and experimentally demonstrated. In this proposed scheme, the 3dB passband of a volume grating in crystal is theoretically predicted and the experimental results are obtained in consistent with our derivation that the bandwidth is controlled from 0.35nm to 3.3nm at the center wavelength of 670. 1nm.

고효율의 광굴절 회절격자에서 수렴되는 판독빔을 이용해 필터 대역폭을 용이하게 제어할 수 있는 새로운 구조의 능동 대역 필터를 제안하고, 광학실험을 통해 응용 가능성을 증명한다. 제시된 구조에서 격자의 파장선택 특성을 이론적으로 예측하였으며, 실험결과 670.1nm의 중심파장을 갖고 $0.35\sim3.3nm$ 범위의 통과대역 제어가 가능한 필터 구성이 가능함을 보였다.

Keywords

References

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