Abstract

In this Letter, a dispersion-based gas sensing method applied to detection of optically thick samples is presented. We show that chirped laser dispersion spectroscopy (CLaDS) technique provides perfectly linear signal response over a wide range of target analyte concentrations. Using the most convenient chirp-modulated CLaDS detection scheme, it enables spectroscopic measurements in a line-locked mode from the minimum detection limit up to $>99\%$ peak molecular absorption.

© 2013 Optical Society of America

Heterodyne architecture for tunable laser chirped dispersion spectroscopy using optical processing

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Chirped laser dispersion spectroscopy for laser-based hydrogen sulfide detection in open-path conditions

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