Chirped Laser Dispersion Spectroscopy for Remote Open-Path Trace-Gas Sensing

Sensors

Michal Nikodem¹ 

[1] id="af1-sensors-12-16466">Electrical Engineering Department, Princeton University, Princeton, NJ 08540, U

关键词: optical dispersion spectroscopy;    laser spectroscopy;    remote sensing;    quantum cascade lasers;   

DOI  :  10.3390/s121216466

来源: mdpi

【 摘 要 】

In this paper we present a prototype instrument for remote open-path detection of nitrous oxide. The sensor is based on a 4.53 μm quantum cascade laser and uses the chirped laser dispersion spectroscopy (CLaDS) technique for molecular concentration measurements. To the best of our knowledge this is the first demonstration of open-path laser-based trace-gas detection using a molecular dispersion measurement. The prototype sensor achieves a detection limit down to the single-ppbv level and exhibits excellent stability and robustness. The instrument characterization, field deployment performance, and the advantages of applying dispersion sensing to sensitive trace-gas detection in a remote open-path configuration are presented.

【 授权许可】

CC BY   
© 2012 by the authors; licensee MDPI, Basel, Switzerland