Quantum cascade laser intracavity absorption sensor

Andrei Muraviev; Doug Maukonen; Chris Fredricksen; Gautam Medhi; Robert E. Peale

doi:10.1117/12.2018193

29 May 2013 Quantum cascade laser intracavity absorption sensor

Andrei Muraviev, Doug Maukonen, Chris Fredricksen, Gautam Medhi, Robert E. Peale

Proceedings Volume 8710, Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XIV; 87100N (2013) https://doi.org/10.1117/12.2018193
Event: SPIE Defense, Security, and Sensing, 2013, Baltimore, Maryland, United States

Abstract

A mid-infrared intracavity laser absorption spectrometer based on an external cavity multi-mode quantum cascade laser is combined with a scanning Fabry-Perot interferometer is used as tunable narrow band transmission filter to analyze the laser emission spectrum. Sensitivity as a trace gas detector at 8.1 micron wavelengths has been demonstrated based on a weak water vapor line at an absorption coefficient of 1 x 10^-5 cm^-1. For molecules of reasonably strong absorption cross section (10-17 cm²), this corresponds to a detection limit of 40 ppb.

Citation Download Citation

Andrei Muraviev, Doug Maukonen, Chris Fredricksen, Gautam Medhi, and Robert E. Peale "Quantum cascade laser intracavity absorption sensor", Proc. SPIE 8710, Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XIV, 87100N (29 May 2013); https://doi.org/10.1117/12.2018193

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