SO2 measurement by 2F-harmonic wavelength modulation spectroscopy at 4μm and 7.4μm

Richard P. Kovacich,Bahram Alizadeh,Michael Lawson,Vasili Kasiutsich,Rhys Jenkins,Jun-ichi Hashimoto,Martin Lopez

SO2 measurement by 2F-harmonic wavelength modulation spectroscopy at 4μm and 7.4μm

2019

Richard P. Kovacich
Bahram Alizadeh
Michael Lawson
Vasili Kasiutsich
Rhys Jenkins
Jun-ichi Hashimoto
Martin Lopez

The measurement performance of SO2 by second harmonic wavelength modulation spectroscopy using an interband cascade laser at 4μm is compared against using a quantum cascade laser at 7.4μm, showing differences in optical interference noise limitation.

Keywords:

Spectroscopy
Wavelength
Modulation
Harmonic
Quantum cascade laser
Interference (wave propagation)
Physics
Interband cascade laser
Optoelectronics
laser beams
Optics
wavelength modulation spectroscopy
Materials science

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