DOI QR코드

DOI QR Code

파장가변 필터를 위한 Plane-Concave Fabry-Perot 공진기의 해석

Analysis of the Plane-Concave Fabry-Perot cavity for a tunable filter

  • 예윤해 (경희대학교 전자정보학부 전자공학 전공, 레이저공학 연구소)
  • Yeh YunHae (School of Electronics & Information Engineering and Institute for Laser Engineering Kyung Hee University)
  • 발행 : 2004.12.01

초록

파장가변 필터를 목적으로 plane-concave 거울쌍으로 구성된 Fabry-Perot 공진기에 대한 해석모델을 제안하고, 이를 실제 제작과정에서의 변수 값을 적용하여 해석한 결과를 제시하였다. 공진기의 결합손실과 거울의 손실이 필터의 삽입손실에 가장 큰 변수로 작용하며, plane-concave 거울쌍 구성을 이용하여 finesse가 600, FSR이 57 nm, 삽입손실 (insertion loss)이 3 dB 이하인 필터를 구현하기 위해서는 손실이 0.09% 이하인 거울을 사용하여 공진기의 결합손실이 0.1% 이하가 되도록 오목거울의 곡률반경과 정렬상태를 조절하여야 하는 것으로 밝혀졌다.

We proposed an analysis model for a Fabry-Perot cavity constructed with a plane-mirrored optical fiber and a concave-mirrored one. We presented the analysis results calculated by inserting practical values into the equations derived. The coupling loss of the cavity and the mirror loss are the most important parameters in reducing the insertion loss of the filter. In order to build a filter of finesse 600, FSR 57 nm, and insertion loss < 3 dB, the plane-concave cavity using mirrors of loss < 0.09% should be aligned for the coupling loss to be less than 0.1 %.

키워드

참고문헌

  1. T. Haber, K. Hsu, C. Miller, and Y. Bao, 'Tunable Erbium-doped fiber ring laser precisely locked to the 50-GHz lTU frequency grid,' IEEE Photon. Technol. Lett., vol. 12(11), pp. 1456-1458, 2000 https://doi.org/10.1109/68.887659
  2. C. M. Miller and F. J. Janniello, 'Passively temperature-compensated fibre Fabry-Perot filter and its application in wavelength division multiple access computer network,' Electron. Lett., vol. 26, pp. 2122-2123, 1990 https://doi.org/10.1049/el:19901365
  3. C. G. Askins, M. A. Putnam, G. M. Williams, and E. J. Friebele, 'Stepped-wavelength optical-fiber Bragg grating arrays fabricated in line on a draw tower,' Opt. Lett., vol. 19, pp. 147-149, 1994 https://doi.org/10.1364/OL.19.000147
  4. C. Miller, T. Li, J. Miller, F. Bao, and K. Hsu, 'Multiplexed fiber gratings enhance mechanical sensing,' Laser Focus World, Mar. 1998
  5. P. Tayebati, P. Wang, M. Azimi, L. Maflah and D. Vakhshoori, 'Microelectromechanical tunable filter with stable half symmetric cavity,' Electron. Lett., vol. 34(20), pp. 1967-1968, 1998 https://doi.org/10.1049/el:19981350
  6. J. Stone and L. W. Stulz, 'Pigtailed high-finesse tunable Fabry-Perot interferometers with large, medium and small free spectral ranges,' Electron. Lett., 23(15), pp. 781-783, 1987 https://doi.org/10.1049/el:19870554
  7. M. G. Xu, H. Geiger, J. L. Archambault, L. Reekie, and J. P. Dakin, 'Novel interrogating system for fibre bragg grating sensors using an acousto-optic tunable filter,' Electron. Lett., vol. 29, pp. 1510-1511, 1993 https://doi.org/10.1049/el:19931006
  8. S. Y. Set, B. Dabarsyah, C. S. Goh, K. Katoh, Y. Takushima, K. Kikuchi, Y. Okabe and N. Takeda, 'A widely tunable fiber Bragg grating with a wavelength tunability over 40 nm,' in OFC 2001, Anaheim, California, paper MC4, 2001 https://doi.org/10.1109/OFC.2001.927833
  9. J. B. Clayton, M. A. El, L. J. Freeman, and C. M. Miller, 'Tunable optical filter,' U. S. Patent Office, Pat. No. 5073004, 1991
  10. D. Marcuse and J. Stone, 'Fiber-coupled short Fabry-Perot resonators,' J. Lightwave Technol., vol. 7, pp. 869-877, 1989 https://doi.org/10.1109/50.19128
  11. 예윤해, 윤지욱, 이성필, '파장가변 광섬유 간섭형 필터 연구개발,' 한국광학회지, 제 9권 3호, pp. 15l-155, 1998
  12. 김종호, 예윤해, '광섬유 Fabry-Perot필터에서 광섬유 단면의 모양과 배치에 따른 결합손실 변화,' 한국광학 화지, 제 8권 3호, pp. 230-235, 1997
  13. D. Marcuse and J. Stone, 'Coupling efficiency of front surface and multilayer mirrors as fiber-end reflectors,' J. Lightwave Technol., vol. 7, pp. 377-381, 1989
  14. G. Meltz, W. W. Morey and W. H. Glenn, 'Formation of Bragg gratings in optical by a transverse holographic method,' Opt. Lett., vol. 14, pp. 823-825, 1989 https://doi.org/10.1364/OL.14.000823
  15. A. D. Kersey, T. A. Berkoff, and W. W. Morey, 'Multiplexed fiber Bragg grating strain-sensor system with a fiber Fabry-Perot wavelength filter,' Opt. Lett., vol. 18, 1370-1372, 1993 https://doi.org/10.1364/OL.18.001370