Abstract
AbstractTo improve the Raman scattering cross-section of trace gases, a Raman spectrum detection method based on the double-clad fiber laser is designed in this paper. The influence of double-cladding fiber laser as a light source on gas Raman detection is investigated. The higher the output power of the double-clad fiber laser, the larger the gas scattering cross-section and the stronger the Raman effect. Therefore, this paper first conducts a numerical analysis of the factors affecting the output power of the double-clad fiber laser and uses MATLAB to simulate and explore the influence of different pumping modes, pumping power, and rare earth doping concentration on the output power of the fiber laser. Then the gas detection system with ytterbium-doped fiber laser as the light source was used to analyze the material qualitatively and quantitatively. Fiber laser as a Raman detection source has the advantages of high linearity and good stability.
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