Observation of CO and CO₂ absorption near 1.57 µm with an external-cavity diode laser

Abstract

Near-IR and visible room-temperature diode lasers in broadly tunable external-cavity configurations are becoming commercially available for gas-sensing applications. Near 1.57 µm, a coincidence of overtone and combination-band transitions from CO, CO₂, OH, and H₂O is particularly interesting for combustion and combustor emissions monitoring. We report initial observations of the room-temperature absorption of CO and CO₂ made with a commercial external-cavity diode laser.

© 1997 Optical Society of America

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