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A diode-laser-based spectrometer for in-situ measurements of volcanic gases

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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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Authors and Affiliations

  1. Istituto Nazionale di Ottica Applicata, Comprensorio Olivetti, Via Campi Flegrei 34, 80078, Pozzuoli Naples, Italy

    A. Rocco & P. De Natale

  2. INGV-Osservatorio Vesuviano, Via Diocleziano 328, 80124, Naples, Italy

    G. De Natale

  3. Dipartimento di Scienze Ambientali, Seconda Università di Napoli and INFM-Gruppo Coordinato Napoli 2, Via Vivaldi 43, 8100, Caserta, Italy

    G. Gagliardi & L. Gianfrani

Authors
  1. A. Rocco
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  2. G. De Natale
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  3. P. De Natale
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  4. G. Gagliardi
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  5. L. Gianfrani
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Corresponding author

Correspondence to P. De Natale.

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PACS

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

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