A Control Loop Which Ensures High Side-Mode-Suppression Ratio in a Tunable DBR Laser

S. L. Woodward, T. L. Koch, U. Koren

Research output: Contribution to journalArticle

17 Scopus citations

Abstract

We present a control loop which ensures single-mode operation of a tunable distributed-Bragg-reflector (DBR) laser. This control loop uses no external optics. The error signal is derived from an integrated detector which measures the light transmitted through the Bragg section. Using this signal to control the current to the Bragg section, the laser is tuned to where the side-mode-suppression ratio is high. This guarantees that the laser will remain single-mode, even when modulated. This servo will find application in wavelength-division-multiplexed (WDM) systems.

Original languageEnglish (US)
Pages (from-to)417-419
Number of pages3
JournalIEEE Photonics Technology Letters
Volume4
Issue number5
DOIs
StatePublished - May 1992
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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