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


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.


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