A diode-laser-based spectrometer for in-situ measurements of volcanic gases
Anno: 2004
Autori: Rocco A., De Natale G., De Natale P., Gagliardi G., Gianfrani L.
Affiliazione autori: Istituto Nazionale di Ottica Applicata, Sez. di Napoli, Via Campi Flegrei 34, 80078 Pozzuoli (NA), Italy;
INGV-Osservatorio Vesuviano, Via Diocleziano 328, 80124 Naples, Italy;
Dipartimento Scienze Ambientali, Seconda Università di Napoli and INFM-Gruppo Coordinato Napoli 2, Via Vivaldi 43, 81000 Caserta, Italy
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 mum, 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.
Giornale/Rivista: APPLIED PHYSICS B-LASERS AND OPTICS
Volume: 78 (2) Da Pagina: 235 A: 240
Parole chiavi: Atmospheric humidity; Chemical sensors; Composition; Concentration (process); Distributed feedback lasers; Electric power utilization; Laser tuning; Light absorption; Light emission; Optical fibers; Photodiodes; Signal to noise ratio; Spectrometers; Stainless steel; Thermocouples; Volcanoes, Remote detection; Volcanic gases, Semiconductor lasersDOI: 10.1007/s00340-003-1339-8Citazioni: 30dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2024-10-13Riferimenti tratti da Isi Web of Knowledge: (solo abbonati) Link per visualizzare la scheda su IsiWeb: Clicca quiLink per visualizzare la citazioni su IsiWeb: Clicca qui