Journal of the Korean Institute of Telematics and Electronics A (전자공학회논문지A)

The Institute of Electronics and Information Engineers (대한전자공학회)
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Comparison of linewidth enhancement factor and differential gain of DFB-LDs with various active layter structures

활성층 구조에 따른 DFB-LD의 선폭확대계수 및 미분이득 비교

  • 박경현 (한국전자통신연구소 화합물반도체 연구부) ;
  • 조호성 (한국전자통신연구소 화합물반도체 연구부) ;
  • 장동훈 (한국전자통신연구소 화합물반도체 연구부) ;
  • 이중기 (한국전자통신연구소 화합물반도체 연구부) ;
  • 김정수 (한국전자통신연구소 화합물반도체 연구부) ;
  • 이승원 (한국전자통신연구소 화합물반도체 연구부) ;
  • 김홍만 (한국전자통신연구소 화합물반도체 연구부) ;
  • 박형무 (한국전자통신연구소 화합물반도체 연구부)
  • Published : 1995.08.01
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Abstract

Linwidth enhancement factor .alpha., linwidth, chirping and differential gain characteristics were measured and compared for each DFB-LDs containing active layers composed of bulk, MQW, and S-MQW, respectively. .alpha. of 6, 4 and 3.2 and chirping measured under 2.5Gbps modulation of 1.29nm, 0.67nm and 0.48nm were given for DFB-LDs of bulk, MQW and S-MQW active layers, respectively. And S-MQW has the largest differential gin of 2.4*10$^{-15}$ cm$^{2}$ (S-MQW) compared to the of 5.4*10$^{-16}$ cm$^{2}$(bulk) and 8.6*10$^{-16}$ cm$^{2}$(MQW). Linewidth enhancement facter .alpha. of less than 2 is expected with p-type modulation doped S-MQW DFB-LD.

Keywords