H2S and CO2 gas sensing using DFB laser
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V. Weldon; J. O'Gorman; P. Phelan; J. Hegarty; T. Tanbun-Ek
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Article
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1995
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Elsevier Science
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English
⚖ 638 KB
Using wavelength-modulation spectroscopy and harmonic detection, we demonstrate, for the first time, direct optical detection of H2S by probing the vt + v 2 + v 3 combination absorption band centred at a wavelength 2 = 1.59 gm using a distributed feedback (DFB) laser diode. A detection limit of less