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 language | English |
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Pages (from-to) | 1383-1386 |
Number of pages | 4 |
Journal | Procedia Chemistry |
Volume | 1 |
Issue number | 1 |
DOIs | |
State | Published - Sep 2009 |
Event | Eurosensors 23rd Conference - Lausanne, Switzerland Duration: 6 Sep 2009 → 9 Sep 2009 |
Keywords
- carbon-monoxide
- laser spectroscopy
- vertical-cavity surface-emitting laser;
- wavelength modulation spectroscopy