During the laser-assited endoscopic surgery, the laser light is delivered to the deep tissue or the internal organ using a light transmitting delivery system. It is necessary to modify the direction of the light emission at the distal end of fiber tip for some application of in laser-assisted surgery. The homemade diffusing fiber and the forward firing fiber are used for the endoscopic delivery system of the continuous IR laser into the water rich tissue. The beam emission and the laser-assisted ablation and coagulation pattern were compared for two distinctive fiber systems. The diffusing fiber produced cavity and coagulation zone more or less a circular shape, while the forward fiber produced an elongated cavity and coagulation region. The diffusing fiber produced wider and shorter coagulation and cavity zone compared to that of forward-firing fiber

Abstract
 1. 서론
 2. 실험 및 방법
  2.1 광섬유
  2.2 레이저
  2.3 실험 방법
 3. 결과 및 고찰
  3.1 광섬유 에칭 가공 결과
  3.2 생체 조직에 대한 레이저 조사
 4. 결론
 참고문헌

• 이호(경북대학교 기계공학부) | H. Lee