Abstract
We propose a novel wavelength modulation spectroscopy (WMS), which adds a triple frequency modulation current to the fundamental sinusoidal modulation current. By selecting theoretical optimum modulation indices, amplitude of the detected 2f improves 66% than that of the traditional wavelength modulation spectroscopy. Experimental results accord with theoretical expectation. Minimum detection limit obtained by the new modulation method develops 56.6% in open-path background. The transitions of CH4 at = 1.654 μm are selected to verify this method. Our method presents good application prospects and can be applied to sense of other gas molecules.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
