A method for trace gas analysis is presented based on stimulated Raman scattering of the analyte in a hollow core photonic crystal fiber. A single beam pulsed laser excitation was used which realized both fiber enhanced Raman scattering and stimulated Raman scattering, that have significant advantages for improving the detection limit. A system was successfully developed based on the method and tested on hydrogen, carbon dioxide, and propene (C3H6) gases. From the results we suggest the method has great potential for analyzing trace complex gases such as volatile organic compounds, which can serve as biomarkers in human breath for lung cancer detection.
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