Korean Journal of Optics and Photonics (한국광학회지)

Optical Society of Korea (한국광학회)
권호 표지
DOI QR코드

DOI QR Code

Widely tunable thulium-doped fiber laser anchored on 50-GHz ITU-T grid in S/S＋ band

S/S＋band에서 넓은 파장가변 영역을 가지고 50-GHz ITU-T격자에 맞는 채널을 생성하는 thulium이 첨가된 광섬유 레이저

  • 안성준 (선문대학교 전자정보통신공학부) ;
  • 박철근 (선문대학교 전자정보통신공학부) ;
  • 안승준 (선문대학교 자연과학부 신소재과학부) ;
  • 박종한 (서울대학교 전기컴퓨터공학부) ;
  • 박남규 (서울대학교 전기컴퓨터공학부)
  • Published : 2004.02.01
Download PDF
⟨ Previous Next ⟩

Abstract

We demonstrate an S/S＋band discretely tunable thulium doped fiber laser (TTDFL), anchored on a 50-㎓ ITU-T grid. Investigating the inversion analysis of the thulium doped fiber (TDF) in applying a dual wavelength (1.4 m and 1.5 m) pumping scheme, a laser whose tuning range covers most of the S/S＋band has been obtained. Within the wide 3-㏈ bandwidth of 65.1 nm, the output power of the tunable laser exceeds 6.1 ㏈m with very flat spectral profile and the number of DWDM channels generated is as large as 178. If we increase the subsidiary pump power to 22 ㎽, the bandwidth is expanded up to 66.2 nm. By controlling the temperature of the fine grid filter, we have also shown that the frequency locking capability of the laser can be improved. The laser developed in this work is expected to be utilized as a practical optical source providing reference wavelengths in the S/S＋band.

S/S＋band에서 ITU-T의 50 ㎓격자에 맞는 채널을 가지는 광대역 파장가변 thulium첨가 광섬유레이저(TTDFL)를 개발하였다. 1.4$\mu\textrm{m}$및 $1.5\mu\textrm{m}$두 대역의 광원으로 펌핑되는 thulium첨가 광섬유(TDF)의 반전에 관한 분석을 통해, 대부분의 S/S＋band에서 파장을 가변할 수 있는 레이저를 구현하였다. 이 파장가변 레이저는 65.1nm의 넓은 3-㏈ 대역폭 내에서 6.7㏈m이상의 평탄한 출력 스펙트럼을 보여주었고, 생성된 DWDM채널 수는 178개에 달하였다. 또한 보조 펌프의 출력을 더 높일경우 66.2 nm까지도 대역폭을 넓힐 수 있었고, 공진기 내부 필터의 온도를 조절함으로써 레이저의 주파수를 더욱 안정화 할 수 있음도 보였다. 본 연구에서 개발된 이 레이저는 S/S＋band에서 기준 파장을 제공하는 유용한 광원으로 활용될 수 있다.

Keywords

References

  1. IEEE Photonics Technology Letters v.14 no.9 Demonstration of highly efficient flat-gain L-band EDFAs by incorporating a fiber Bragg grating J.M.Oh;H.B.Choi;D.Lee;S.J.Ahn;S.J.Jung;S.B.Lee https://doi.org/10.1109/LPT.2002.801101
  2. J. Opt. Soc. Korea v.7 no.2 Investigation of amplifying mechanism in an L-band EDFA pumped by a 980 nm pump H.H.Lee;J.M.Oh;B.J.Kim;D.Lee https://doi.org/10.3807/JOSK.2003.7.2.067
  3. Optical Fiber Communication Conference '2001 S-band fiber-optic amplifiers T.Sakamoto
  4. Journal of Selected Topics in Quantum Electronics v.8 no.3 Raman amplifiers for telecommunications M.N.Islam https://doi.org/10.1109/JSTQE.2002.1016358
  5. IEEE Photonics Technology Letters v.13 no.5 Laser-diode-pumped highly-efficient gain-shifted thulium-doped fiber amplifier operating in the 1480-1510-nm band T.Kasamatsu;Y.Yano;T.Ono https://doi.org/10.1109/68.920742
  6. Electronic Letters v.37 48% power conversion efficiency in single pump gain-shifted thulium-doped fiber amplifer F.Roy;F.Leplingard;L.Lorcy;A. Le Sauze;P.Baniel;D.Bayart https://doi.org/10.1049/el:20010672
  7. Electronic Letters v.37 1480-1510 nm band Tm-doped fibre amplifier with high power conversion efficiency of 42% S.Aozasa;H.Masuda;H.Ono;T.Sakamoto;T.Kanamori;Y.Ohishi;M.Shimizu https://doi.org/10.1049/el:20010781
  8. Electronic Letters v.38 Gain-shifted TDFA employing high concentration doping technique with high internal power conversion efficiency of 70% S.Aozasa;H.Masuda;T.Sakamoto;K.Shikano;M.Shimizu https://doi.org/10.1049/el:20020264
  9. Optical Fiber Communication Conference '2003 A Discretely Tunable Erbium-Doped Fiber Ring Laser with 273 Ch. 50 GHz-Spacing ITU-T Grids in C- & L-band Regions H.Ryu;D.Lee;W.Lee;H.Moon;H.Suh
  10. Optical Fiber Communication Conference '2002 Gain excursion & tilt compensation algorithm for TDFA using 1.4 mm/1.5 mm Dual Wavelength pump control W.J.Lee;C.H.Lee;J.Byun;J.Park;N.Park
  11. IEEE Photonics Technology Letters v.14 no.11 Analysis on the Transient Response of 1.4m/1.5m Dual Wavelength Pumped Thulium Doped Fiber Amplifiers J.Byun;P.Kim;W.J.Lee;C.H.Lee;N.Park https://doi.org/10.1109/LPT.2002.803336
  12. Optical Fiber Communication Conference '2003 Comparison of Gain Characteristics of TmDoped Fiber Amplifier by Different Pumping Schemes T.Tamaoka