Fiber-lasers for coherent Raman detection of toxic chemical hazards
Abstract
We report on a fiber-format laser system for Fourier-transform coherent anti-Stokes Raman spectroscopy (FT-CARS) of toxic chemical hazards, such as chemical warfare agents (CWAs). The system is based on ytterbium-fiber technology featuring ultra-broad spectral coverage and high-sensitivity. High-quality CARS spectra with maximum Raman shifts of 3000 cm-1 and signal-to-noise ratio >200 for observation times of 160 μs are measured; a detection limit of one part per thousand is demonstrated with a cyanide/water solution. The system was developed as the basis for a highly accurate, sensitive, reliable and portable device for the real time detection of water contaminants and deposited CWAs at trace levels.
- Publication:
-
Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XX
- Pub Date:
- May 2019
- DOI:
- 10.1117/12.2518847
- Bibcode:
- 2019SPIE11010E..15C