Design and characteristics of DBR-laser-based environmental sensors

Yuri Beregovski, Oliver Hennig, Mahmoud Fallahi, Francisco Guzman, Rosalie Clemens, Sergio Mendes, Nasser Peyghambarian

Research output: Contribution to journalArticle

10 Scopus citations

Abstract

This paper reports on the development of a new laser-based chemical sensor. The optical sensor is based on the modification of the resonant cavity of a distributed-Bragg-reflector (DBR) laser. Part of the cavity (phase section and/or DBR grating) is covered by a sensitive layer that changes its refractive index as a result of interaction with a given chemical. This produces the change of optical cavity length, resulting in the lasing frequency shift. The results of modeling and preliminary experiments proving the concept of chemical sensing are presented.

Original languageEnglish (US)
Pages (from-to)116-124
Number of pages9
JournalSensors and Actuators, B: Chemical
Volume53
Issue number1-2
DOIs
StatePublished - Nov 26 1998

Keywords

  • Chemical sensors
  • DBR lasers
  • Environmental monitoring
  • External cavity

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Instrumentation
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Electrical and Electronic Engineering
  • Materials Chemistry

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