Korean Journal of Optics and Photonics (한국광학회지)

Optical Society of Korea (한국광학회)
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Fabrication of a Multidirectional Side-firing Optical Fiber Tip and Its Numerical Analysis

다방향 조사가 가능한 광섬유 팁 해석 및 제작

  • Jung, Deok (Advanced Photonics Research Institute, Gwangju Institute of Science and Technology) ;
  • Sohn, Ik-Bu (Advanced Photonics Research Institute, Gwangju Institute of Science and Technology) ;
  • Noh, Young-Chul (Advanced Photonics Research Institute, Gwangju Institute of Science and Technology) ;
  • Kim, Jin-Hyeok (Interdisciplinary Program for Photonic Engineering, Chonnam National University) ;
  • Kim, Changhwan (School of Mechanical Engineering, Kyungpook National University) ;
  • Lee, Ho (School of Mechanical Engineering, Kyungpook National University)
  • 정덕 (광주과학기술원 고등광기술연구소) ;
  • 손익부 (광주과학기술원 고등광기술연구소) ;
  • 노영철 (광주과학기술원 고등광기술연구소) ;
  • 김진혁 (전남대학교 광공학협동과정) ;
  • 김창환 (경북대학교 기계공학과) ;
  • 이호 (경북대학교 기계공학과)
  • Received : 2014.03.05
  • Accepted : 2014.07.14
  • Published : 2014.08.25
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Abstract

In this paper, using the value theoretically calculated to emit multidirectionally a beam coming into an optical fiber with diameter of $125{\mu}m$, we modeled and produced a cone-shaped structure at the distal end of the fiber. A numerical simulation was performed for an optical fiber tip in which all incident beams were totally reflected and emitted toward the side, as well as for an optical fiber tip from which the beams could be emitted forward and sideways simultaneously. We produced multidirectional-firing optical fiber tips based on the simulation result and model. Laser fabrication of the optical fiber was done by processing a cone-shaped structure at the distal end of an optical fiber with diameter of $125{\mu}m$ using a femtosecond pulsed laser and polishing the processed surface with a $CO_2$ laser. We also conducted an analysis to compare experimental and simulation results.

본 논문에서는 직경 $125{\mu}m$의 싱글모드 광섬유에 입사된 빔을 다방향으로 방사하기 위하여 이론적으로 계산된 값을 광학설계 프로그램인 LightTools를 이용하여 광섬유 끝단에 원뿔형 구조물을 모델링 하고 입사된 모든 빔이 전반사 되어 측면으로 방사되는 광섬유 팁과, 전방과 측면으로 동시에 방사가 가능한 광섬유 팁에 대해 시뮬레이션을 하였다. 이러한 결과를 가지고 광섬유 끝단에 펨토초 레이저와 $CO_2$ 레이저를 이용하여 원뿔형 구조물을 제작하고 시뮬레이션 결과와 비교 분석하는 연구를 수행하였다.

Keywords

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