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Conferences > LACEA > 2002 > SaB > SaB4

Evanescent-field laser sensor for in-situ monitoring of volcano gas emissions

Ulrike Willer, Irina Kostjucenko, Christian Bohling, Thomas Zentgraf, Dirk Scheel, and Wolfgang Schade

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Abstract

A DFB laser diode (1.57 µm) is guided through a pure core fused silica fiber. Tuning the laser frequency across molecular resonances will change the frustrated (FTR) and the attenuated total reflection (ATR). Such an evanescent-field laser sensor is used for in-situ monitoring of H2S in volcano gases at the site “Solfatara”(Italy).

© 2002 Optical Society of America

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