We report the first results of the field opera- tion of a novel, portable diode-laser spectrometer for gas- concentration measurements in volcanic areas. Remote detec- tion of direct absorption line shapes was possible thanks to a telecom single-mode optical fiber that delivered radiation from a room-temperature distributed-feedback diode laser, emitting at 1.997 ?m, to an open-path multiple-reflection cell, placed on gas effluxes. The system was deployed on two different active volcanoes in Italy, where simultaneous and continuous monitor- ing of CO2 and H2O concentrations has been demonstrated.
A diode-laser-based spectrometer for in-situ measurements of volcanic gases
A Rocco;P De Natale;G Gagliardi;
2004
Abstract
We report the first results of the field opera- tion of a novel, portable diode-laser spectrometer for gas- concentration measurements in volcanic areas. Remote detec- tion of direct absorption line shapes was possible thanks to a telecom single-mode optical fiber that delivered radiation from a room-temperature distributed-feedback diode laser, emitting at 1.997 ?m, to an open-path multiple-reflection cell, placed on gas effluxes. The system was deployed on two different active volcanoes in Italy, where simultaneous and continuous monitor- ing of CO2 and H2O concentrations has been demonstrated.File in questo prodotto:
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