Methane sensing with a novel micromachined single-frequency Fabry-Perot laser diode emitting at 1331 nm

Methane sensing with a novel micromachined single-frequency Fabry-Perot laser diode emitting at 1331 nm

Spectroscopic-based gas sensing is demonstrated using micromachined single-frequency Fabry-Perot (FP) laser diodes emitting at 1.331 μm with a side mode suppression ratio of greater than 24 dB over a significant emission wavelength tuning range. The utility of these novel mode controlled FP lasers f...

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Veröffentlicht in:IEEE photonics technology letters 1997-03, Vol.9 (3), p.357-359
Hauptverfasser: Weldon, V., O'Gorman, J., Perez-Camacho, J.J., McDonald, D., Hegarty, J., Corbett, B.
Format: Artikel
Sprache:eng
Schlagworte:
Absorption
Diode lasers
Fabry-Perot
Gas lasers
Gases
Laser applications
Laser modes
Laser tuning
Optical control
Spectroscopy
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Zusammenfassung:Spectroscopic-based gas sensing is demonstrated using micromachined single-frequency Fabry-Perot (FP) laser diodes emitting at 1.331 μm with a side mode suppression ratio of greater than 24 dB over a significant emission wavelength tuning range. The utility of these novel mode controlled FP lasers for spectroscopic detection of gases is assessed by investigating the methane-absorption band in the 1.33 μm region. By probing the narrow linewidth R2 rotational absorption line, we demonstrate a low gas detection limit of 28 ppm/spl middot/m and confirm the suitability of micromachined lasers in such applications.
ISSN:1041-1135
1941-0174
DOI:10.1109/68.556072