The Sidemode-Suppression Ratio of a Tunable DBR Laser

S. L. Woodward, I. M.I. Habbab, T. L. Koch, U. Koren

Research output: Contribution to journalArticle

15 Scopus citations

Abstract

We investigate, both experimentally and theoretically, how the sidemode-suppression ratio (SMSR) of a multisection multiple-quantum-well distributed-Bragg-reflector (MQW-DBR) laser varies with tuning current. We find that as the tuning current is adjusted the wavelength and the SMSR vary, with the peak SMSR ∞ 43 dB. The output power also varies with tuning current, and we can find when the laser is near a mode hop by examination of the light versus tuning current curve. This implies that we can adjust the tuning current so that the laser frequency is near the center of the Bragg band without measuring the SMSR. Our measurements are in good agreement with theory.

Original languageEnglish (US)
Pages (from-to)854-856
Number of pages3
JournalIEEE Photonics Technology Letters
Volume2
Issue number12
DOIs
StatePublished - Dec 1990
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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