Korean Journal of Optics and Photonics (한국광학회지)

Optical Society of Korea (한국광학회)
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Variable Optical Attenuator based on Side Polished Fiber Technique

측면 연마 광섬유를 이용한 가변 광 감쇠기

  • 구숙영 (청주대학교 정보기술공학부 레이저광정보공학전공) ;
  • 정치섭 (청주대학교 정보기술공학부 레이저광정보공학전공)
  • Published : 2004.06.01
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Abstract

The variable optical attenuator based on side polished fiber technique was experimentally demonstrated. Various combination mixtures of poly(vinylidene fluoride) and poly(methyl methacrylate) have been used as the overlay waveguide materials for the variable optical attenuator application. A controllable amount of optical power can be extracted via evanescent coupling by changing the temperature of the polymer mixture, thereby changing its refractive index. The VOA under test provides a maximum attenuation of 30 ㏈ and an insertion loss of 0.1 ㏈.

측면 연마 광섬유를 이용하여 가변 광 감쇠기를 실험적으로 구현하였다. 오버레이 물질로는 poly(vinylidene fluoride)와 poly (methyl methacrylate) 고분자 혼합체를 사용하였다. 혼합고분자의 온도를 변화시켜 오버레이의 굴절률을 조절하였고, 그로 인한 소산장 결합정도를 변화시켜 광섬유로부터 추출되는 광량을 조절하였다. 삽입손실은 0.1 ㏈ 이하였으며 30㏈이상의 감쇠를 실현하였다.

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References

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