Abstract
We report the first results of the field operation of a novel, portable diode-laser spectrometer for gas-concentration measurements in volcanic areas. Remote detection 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 μm, 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 monitoring of CO2 and H2O concentrations has been demonstrated.
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42.62.Fi; 07.60.Vg; 93.85.+q
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Rocco, A., De Natale, G., De Natale, P. et al. A diode-laser-based spectrometer for in-situ measurements of volcanic gases. Appl Phys B 78, 235–240 (2004). https://doi.org/10.1007/s00340-003-1339-8
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DOI: https://doi.org/10.1007/s00340-003-1339-8