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The first VCSEL-based O2 sensor for gas/oil furnace applications employing a diffuse reflector is presented which circumvents alignment and interference problems. Optimized data processing is used for long-term stable operation and allows for real-time measurement.
A novel compact sensor approach utilizing the wide current tunability of VCSELs and employing reference gas in the photodetector is tested under diverse standard conditions for fire detection.
Successful application of recently developed GaSb-based single-mode vertical-cavity surface-emitting lasers for gas-sensing at 2.3 mum is reported. CO and CH4 have been detected simultaneously using wavelength modulation spectroscopy with a multi-line curve fit concept.
A novel compact sensor approach utilizing the wide current tunability of VCSELs with reference gas in the photodetector is reported. This inherent spectral self-calibrating technique is demonstrated with the first carbon-monoxide sensor at 2.3 mum.
A simple theoretical model is used to derive closed form expressions for the FM response of VCSELs. These match measurement results very well and give a significant improvement over the usually assumed first order model.
A simple theoretical model is used to derive closed form expressions for the FM response of VCSELs. These match measurement results very well and give a significant improvement over the usually assumed first order model.
A simple theoretical model is used to derive closed form expressions for the FM response of VCSELs. These match measurement results very well and give a significant improvement over the usually assumed first order model.
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