Open AccessChirped laser dispersion spectroscopy for spectroscopic chemical sensing with simultaneous range detection
Author(s) -
Andreas Hangauer,
Yifeng Chen,
Gerard Wysocki
Publication year - 2021
Publication title -
optics letters/optics index
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.524
H-Index - 272
eISSN - 1071-2763
pISSN - 0146-9592
DOI - 10.1364/ol.413312
Subject(s) - optics , dispersion (optics) , spectroscopy , lidar , laser , optical path , materials science , calibration , remote sensing , path length , range (aeronautics) , optical sensing , physics , quantum mechanics , composite material , geology
Spectroscopic chemical detection requires knowledge or determination of an optical path for accurate quantification of path-integrated concentration of species. Continuous-wave-laser-based spectroscopic systems operating in an open integrated-path remote sensing configuration are usually not equipped for optical path determination. Here we demonstrate a measurement technique capable of simultaneous spectroscopic chemical quantification and range finding. The range-finding functionality is implemented with chirped laser dispersion spectroscopy. The methodology is potentially useful for remote chemical sensing in a hard-target LIDAR configuration and for automatic calibration of gas cells with unknown or varying lengths.