Korean Journal of Optics and Photonics (한국광학회지)

Optical Society of Korea (한국광학회)
권호 표지
DOI QR코드

DOI QR Code

A Short Wavelength Filter Based on Dissimilar Dispersive Property Between a Thermally Expanded Cored Fiber and an External Medium

측면 연마된 열확산 코어 광섬유와 외부 물질의 분산 특성 차이를 이용한 단파장 통과 필터

  • Kim, Kwang-Taek (Department of Optoelectronics, Honam University) ;
  • Lee, Kyu-Hyo (Department of Optoelectronics, Honam University) ;
  • Shin, Eun-Soo (Department of Optoelectronics, Honam University) ;
  • Hwangbo, Seung (Department of Optoelectronics, Honam University) ;
  • Sohn, Kyung-Rak (Division of Radio and information communication Engineering Korea Maritime University) ;
  • Kim, Jeong-Geun (Division of Electrical Communications and Electronic Engineering, Gwangju University) ;
  • Lee, Dong-Ho (School of Electrical Engineering and Computer Science, Kyungpook National University) ;
  • Song, Jae-Won (School of Electrical Engineering and Computer Science, Kyungpook National University)
  • 김광택 (호남대학교 광전자 공학과) ;
  • 이규효 (호남대학교 광전자 공학과) ;
  • 신은수 (호남대학교 광전자 공학과) ;
  • 황보승 (호남대학교 광전자 공학과) ;
  • 손경락 (한국해양대학교 전파정보통신공학부) ;
  • 김정근 (광주대학교 광전자통신 공학과) ;
  • 이동호 (경북대학교 전자전기컴퓨터공학부) ;
  • 송재원 (경북대학교 전자전기컴퓨터공학부)
  • Published : 2005.12.01
Download PDF
⟨ Previous Next ⟩

Abstract

We have demonstrated a fiber short-wavelength filter with a good cut-off property using dissimilar dispersive properties between? a thermally expanded cored fiber and an external medium. Side-polishing is applied to coupling between the fiber and the external medium. The experimental results revealed that the bend edge wavelength can be adjusted by controlling the degree of core expansion. Futhermore, the sharpness of wavelength response? was significantly? improved by employing expanded core fiber instead of a conventional single mode fiber. Tuning range of the band edge wavelength exceeded 400 m based on thermo-optic effect of the external medium.

코어가 확산된 단일모드 광섬유와 외부 물질 사이의 분산 특성의 차이를 이용하여 차단 특성이 우수한 단파장 통과 필터(short-pass filter)를 구현하였다. 두 물질의 결합 방법으로 측면 연마 기법을 도입하였다. 실험 결과 소자의 대역경계 파장(band edge wavelength)은 코어의 확산 정도로 조절이 가능하였다. 일반 통신용 단일 모드 대신에 열확산 코어 확산 광섬유를 도입함으로써 더 예리한 파장응답을 얻을 수 있었다. 열광학 효과를 이용하여 경계 파장을 400nm 이상 가변 할 수 있음을 관측하였다.

Keywords

References

  1. S. Creaney, W. Johnstone, and K. McCallion, 'Continuous-fiber modulator with high-bandwidth coplanar strip electro des,' IEEE Photonics Technol. Lett. vol. 8, no. 3, pp. 355-357, 1996 https://doi.org/10.1109/68.481115
  2. S. M. Tseng and C. L. Chen, 'Low voltage optical fiber switch,' Jpn, J. Appl. Phys, vol. 37, no. IA/B, pp. L42-L45, 1998 https://doi.org/10.1143/JJAP.37.L42
  3. G. Fawcett, W. Johnstone, I. Andonovic, D. J. Bone, T. G. Harvey, N. Carter and T. G. Ryan, 'In-line fiber-optic intensity modulator using electro-optic polymer,' Electron. Lett. vol. 28, no. 11, pp. 985-986, 1992 https://doi.org/10.1049/el:19920626
  4. K. T. Kim, S. Hwang-bo, G. I. Kweon and S. R. Choi, 'Widely tunable filter based on side-polished polarisationmaintaining fibre coupler with thermo-optic polymer overlay,' Electron. Lett. vol. 40, no. 21, pp. 1330-1332, 2004 https://doi.org/10.1049/el:20045463
  5. J. Villatoro, D. Monzon-Hernamdez, and D. L. Moreno, 'In-line tunable band-edge filter based on a single-mode tapered fiber coated with a dispersive material,' IEEE Photon. Technol. Lett. vol. 17, no. 8, pp. 1665-1667, 2005 https://doi.org/10.1109/LPT.2005.851993
  6. N. K. Chen, S. Chi, and S. M. Tseng, 'Wide band tunable filter short-pass filter based on side-polished fiber with dispersive polymer overlay,' Opt. Lett., vol. 29, no. 19, pp. 2219-2221, 2004 https://doi.org/10.1364/OL.29.002219
  7. K. Shiraishi, Y. Aizawa and S. Kawakami, 'Beam expending fiber using thermal diffusion of the dopand,' J. Lightwave Technol. vol. 8, no. 8, pp. 1151-1161, 1990 https://doi.org/10.1109/50.57835
  8. K. Shiraishi, T. Yanagi, and S. Kawakami, 'Light Propagation characteristics in thermally diffused expanded core fibers,' J. Lightwave Technol. vol. 11, no. 10, pp. 15841591, 1993 https://doi.org/10.1109/50.249900
  9. O. Hanaizumi, Y. Aizawa, H. Minamide and S. Kawakami, 'Fabrication of an expended core fiber having MFD of $40\;{\mu}m$m preserving outer diameter,' IEEE Phonic Technol. Lett. vol. 6, no. 7, pp. 842-844. 1994 https://doi.org/10.1109/68.311473
  10. Y. Ohtera, O. Hanaizumi, and S. Kawakami, 'Numerical analysis of eigenmodes and splice losses of themally diffused expanded core fibers,' J. Lightwave Technol. vol. 17, no. 12, pp. 2672-2682
  11. S. M. Tseng and C. L. Chen, 'Side-polished fibers,' Appl. optics vol. 31, no. 18, pp. 3438-3447, 1992 https://doi.org/10.1364/AO.31.003438
  12. T. lzawa and S. Sudo, Optical fibers : Materials and fabrication, KTK Scientific publishers, Tokyo, 1987