Proposed enhancement of side-mode suppression ratio in λ/4 shifted distributed feedback lasers with nonuniform diffused quantum wells

Siu Fung Yu, E. Herbert Li

Research output: Journal article publicationJournal articleAcademic researchpeer-review

9 Citations (Scopus)


An enhancement of the side mode suppression ratio, by utilizing interdiffused quantum wells, of a λ/4 shifted distributed feedback laser is demonstrated theoretically. It is found that by introducing a diffusion step along the longitudinal direction of the quantum-well active region, the suppression ratio can be improved significantly for large κL (>2.6) devices. The maximum power for single longitudinal mode operation is increased by more than 50 mW.
Original languageEnglish
Pages (from-to)482-484
Number of pages3
JournalIEEE Photonics Technology Letters
Issue number4
Publication statusPublished - 1 Apr 1996
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering

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