A Trench Structure for Low Bending Loss of Bent Optical Waveguides

원형으로 굽은 광도파로의 low bending loss를 위한 trench 구조설계: 원통좌표계 FD-BPM

  • 한영진 (서울시립대학교 전자공학과) ;
  • 김창민 (서울시립대학교 전자공학과)
  • Published : 1995.12.01


Bending losses of bent optical waveguides are calculated by virtue of the finite difference-beam p propagation method in the cylindrical coordinate system. In order to minimize the radiating losses of bent optical waveguides, we apply the trench structure to the bent waveguides and perform the a analysis to keep track of: 1) the influence of curvature radius on the bending loss without the trench, 2) the influence of curvature radius and refractive index difference on the bending loss with the trench, 3) the influence of the trench width on the bending loss.

원통좌표계에서의 FD-BPM(finite difference-beam propagation method)을 이용하여 굽은 광도파로의 bending loss를 계산하였다. Bending loss를 최소화하기 위해 trench구조를 적용하였으며 다음의 세가지 측면에서 해석하였다. 1)trench구조가 없을때 곡률반경에 따른 bending loss, 2)폭과 위치가 일정한 trench구조가 있을때 곡률반경과 굴절율차에 따른 bending loss, 3)trench의 위치가 일정할 때 trench의 폭에 따른 bending loss를 계산하였다.



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