Korean Journal of Optics and Photonics (한국광학회지)

Optical Society of Korea (한국광학회)
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K-domain Linearization Using Fiber Bragg Grating Array Based on Fourier Domain Optical Coherence Tomography

광섬유 브라그 격자를 이용한 퓨리어 영역 광 결맞음 단층 촬영에서의 파수영역 선형화

  • Lee, Byoung-Chang (Department of Physics, Chungnam National University) ;
  • Eom, Tae-Joong (Advanced Photonics Research Institute, Gwangju Institute of Science and Technology) ;
  • Jeon, Min-Yong (Department of Physics, Chungnam National University)
  • 이병창 (충남대학교 자연과학대학 물리학과) ;
  • 엄태중 (광주과학기술원 고등광기술연구소) ;
  • 전민용 (충남대학교 자연과학대학 물리학과)
  • Received : 2010.11.29
  • Accepted : 2011.04.04
  • Published : 2011.04.25
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Abstract

We demonstrate a k-domain linearization using a fiber Bragg grating (FBG) array for Fourier domain optical coherence tomography based on a wavelength swept laser. The k-domain linearization is carried out with an interpolation method using a FBG array with five FBGs. The measured signal-to-noise ratio from the point spread function after k-domain linearization is 12 dB improved over that of without k-domain linearization at the 1 mm depth of the sample. Clear OCT imaging of the slide glass with k-domain linearization could be obtained.

반도체 광 증폭기와 파브리-페롯 가변 필터를 이용한 파장 훑음 레이저 기반 광 결맞음 단층 촬영을 구성하고, 이로부터 선명한 이미징을 얻기 위한 파수 영역 선형화를 구현하였다. 파수 영역 선형화는 5 개의 서로다른 공진 파장을 가진 광섬유 격자로 이루어진 어레이를 이용하여 보간법으로 수행하였다. 샘플단의 1 mm 깊이에서 파수 영역 선형화를 수행한 후 점 분포 함수(point spread function)로부터 측정한 SNR(signal-to-noise ratio)은 12 dB 향상된 값을 얻어냈다. 또한 파수 영역 선형화 전과 후에 대해 슬라이드 글라스를 이용하여 OCT 이미징을 얻어낸 결과 파수 영역 선형화가 매우 잘 되었음을 확인할 수 있었다.

Keywords

References

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