High-power single-mode operation in DFB and FP lasers using diffused quantum-well structure

Siu Fung Yu, C. W. Lo, E. Herbert Li

Research output: Journal article publicationJournal articleAcademic researchpeer-review

12 Citations (Scopus)


Distributed feedback (DFB) and Fabry-Perot (FP) semiconductor lasers with step and periodic interdiffusion quantum-well structures are proposed for high-power single-longitudinal-mode operation. It is shown that the phase-adjustment region formed by the diffusion step (i.e., step change in optical gain and refractive index) counteracts the influence of spatial hole burning, especially for DFB lasers with large coupling-length products biased at high injection current. Forthermore. it is found that with careful design of the diffusion grating (i.e., grating period and amount of diffusion extent) of FP lasers, side-mode suppression ratio can be enhanced and threshold current density can be minimized to a satisfied level.
Original languageEnglish
Pages (from-to)999-1008
Number of pages10
JournalIEEE Journal of Quantum Electronics
Issue number6
Publication statusPublished - 1 Jun 1997
Externally publishedYes


  • Annealing
  • Diffusion processes
  • Distributed feedback lasers
  • Fabry-Perot resonators
  • Laser modes
  • Quantum wells
  • Semiconductor device modeling
  • Semiconductor lasers

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


Dive into the research topics of 'High-power single-mode operation in DFB and FP lasers using diffused quantum-well structure'. Together they form a unique fingerprint.

Cite this