Miniaturized Laser Spectroscopic CO Sensor for Industrial and Safety Applications

Jia Chen, Andreas Hangauer, Rainer Strzoda, Maximilian Fleischer, Markus C. Amann

Research output: Contribution to journalConference articlepeer-review

8 Scopus citations

Abstract

A miniaturized optical carbon-monoxide sensor based on tunable diode laser spectroscopy is presented and tested for various applications. It utilizes recently developed Vertical-Cavity Surface-Emitting Lasers (VCSELs) emitting at 2.3 μm as light source and the photodetector housing as integrated gas reference cell. Together with a wide/narrow spectral scan algorithm for wavelength stabilization, a compact, self-monitored and microcontroller-based sensor is realized. In contrast to conventional line-locking, the full wavelength scale of the spectral scans is inherently calibrated. The achieved sensing resolution (1 sigma) is 3 ppm for 1 second averaging.

Original languageEnglish
Pages (from-to)1383-1386
Number of pages4
JournalProcedia Chemistry
Volume1
Issue number1
DOIs
StatePublished - Sep 2009
EventEurosensors 23rd Conference - Lausanne, Switzerland
Duration: 6 Sep 20099 Sep 2009

Keywords

  • carbon-monoxide
  • laser spectroscopy
  • vertical-cavity surface-emitting laser;
  • wavelength modulation spectroscopy

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