Optical sensor for NO2 gas detection using an external cavity diode laser

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


In this paper, an external cavity diode laser (ECDL) in Littrow configuration with narrowband emission is presented. The laser system is based on a commercially available GaN Fabry-Perot laser diode. Longitudinal mode selection is performed using a reflective holographic grating. Tuning range over 3.4 nm is achieved with a short linewidth of 0.02 nm at the rated current. The ECDL system is integrated into an optical sensor for remote detection of nitrogen dioxide (NO2) gas.

Original languageEnglish
Title of host publicationOptical Sensors 2023
EditorsFrancesco Baldini, Jiri Homola, Robert A. Lieberman
ISBN (Electronic)9781510662643
StatePublished - 2023
EventOptical Sensors 2023 - Prague, Czech Republic
Duration: 24 Apr 202326 Apr 2023

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X


ConferenceOptical Sensors 2023
Country/TerritoryCzech Republic

Bibliographical note

Publisher Copyright:
© 2023 SPIE.


  • Fabry-Perot laser diode
  • external cavity diode laser
  • nitrogen dioxide
  • reflective holographic grating

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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