Infrared laser spectroscopy for trace gas analysis

Markus W. Sigrist; Markus Naegele; Albert Romann

doi:10.1117/12.437224

14 August 2001 Infrared laser spectroscopy for trace gas analysis

Markus W. Sigrist, Markus Naegele, Albert Romann

Proceedings Volume 4419, 4th Iberoamerican Meeting on Optics and 7th Latin American Meeting on Optics, Lasers, and Their Applications; (2001) https://doi.org/10.1117/12.437224
Event: IV Iberoamerican Meeting of Optics and the VII Latin American Meeting of Optics, Lasers and Their Applications, 2001, Tandil, Argentina

Abstract

This paper discusses main aspects of trace gas sensing base don laser spectroscopic techniques. High detection sensitivities and selectivities are achieved by using tunable narrowband IR laser sources emitting preferentially in the mid-IR wavelength range. CO₂ lasers, nonlinear optical devices such as optical parametric oscillators and difference frequency generation, as well as quantum cascade laser can be employed. Detection methods involve multipass transmission, intracavity absorption, photoacoustic and cavity ringdown schemes. The performance of various systems developed in our and other laboratories is illustrated with examples from different fields. Minimum detectable gas concentrations are at the ppb to sub-ppb level. Applications include fast analyses of multicomponent samples, field measurements in various environments as well as medical diagnostics.

Citation Download Citation

Markus W. Sigrist, Markus Naegele, and Albert Romann "Infrared laser spectroscopy for trace gas analysis", Proc. SPIE 4419, 4th Iberoamerican Meeting on Optics and 7th Latin American Meeting on Optics, Lasers, and Their Applications, (14 August 2001); https://doi.org/10.1117/12.437224

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