Journal of the Institute of Electronics Engineers of Korea SD (대한전자공학회논문지SD)

The Institute of Electronics and Information Engineers (대한전자공학회)
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Ultra-narrow Linewidth FBG Cavity DFB Laser with saturable Absorber

포화흡수체를 이용한 극미세선폭 FBG 공동 DFB 레이저

  • 김준원 (경희대학교 대학부 전자공학과) ;
  • 진용옥 (경희대학교 정보통신대학부) ;
  • 최규남 (텍사스 에이엔엠 대학교 CEMDAS 연구소)
  • Published : 2002.05.01
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Abstract

A novel ultra-narrow linewidth single longtudinal mode DFB semiconductor laser in the extended FBG cavity is proposed. The 3㏈ linewidth of 20KHz was demonstrated by using self-heterodyne measurement set-up with a fiber delay line of 63km. And this linewidth was further compressed to less than 3KHz, which is resolution limited performance, by inserting E $r^{+3}$ doped fiber saturable absorber. This is equivalent to 3㏈ linewidth of 2$\times$10$^{-8}$ nm.

DFB 레이저를 이용하여 긴 FBG 공동에서 극미세선폭 레이저광을 발생시키는 새로운 방법을 제시하였다 63㎞의 광섬유 지연선로를 사용한 자기헤테로다인 측정장치를 사용하여 레이저 선폭을 측정한 결과 3㏈ 선폭으로 20㎑를 얻었다. 이 레이저에 포화흡수체로 Er/sup +3/ 이 도핑된 광섬유를 사용하여 다시 선폭을 압축한 결과 자기헤테로다인 측정장치의 해상도 한계인 3㎑ 이하의 선폭을 얻었다. 이는 2×10/sup -8/㎚의 선폭에 해당한다.

Keywords

References

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