Linewidth and Alpha-Factor of Detuned-Loaded DBR Lasers

Jean Marc Verdiell, Uziel Koren, Thomas L. Koch

Research output: Contribution to journalArticlepeer-review

17 Scopus citations


We report measurements of the α-factor and linewidth of DBR lasers fabricated with weak grating constants. Such devices exhibit detuned-loading effects and the measured values depend strongly on the tuning current of the Bragg section, α-factor behavior is found to agree with earlier theoretical predictions. Linewidth behavior is shown to be dominated by carrier shot noise in the tuning section. A theoretical analysis of the DBR laser is outlined including detuned loading and carrier shot noise effect.

Original languageEnglish (US)
Pages (from-to)302-305
Number of pages4
JournalIEEE Photonics Technology Letters
Issue number4
StatePublished - Apr 1992

ASJC Scopus subject areas

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


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