Linewidth Enhancement in Distributed-Feedback Semiconductor Lasers

Research output: Contribution to journalArticlepeer-review

30 Scopus citations


It is demonstrated that the linewidth enhancement in distributed-feedback (DFB) laser diodes can differ significantly from (1 + α2), where a is Henry's linewidth enhancement factor. The influence of the relevant laser parameters, the detuning of the gain peak wavelength, a π/2 phase shift and a reflecting end facet on the linewidth enhancement is discussed with respect to an improved DFB laser design.

Original languageEnglish
Pages (from-to)569-571
Number of pages3
JournalElectronics Letters
Issue number9
StatePublished - 1990
Externally publishedYes


  • Lasers and laser applications
  • Optical communications


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