Abstract
The present study describes the development of a molecule concentration measurement technique in gas flows by using Coherent anti-Stokes Raman scattering (CARS). The wavelength difference of the excitation beams were adjusted to coincide with the vibrational energy level of the sample molecules under measurement to obtain CARS signal. CARS was generated from a mixture of N_2-CO_2 injected into a chamber. The CARS intensity was measured for several mixture ratios, and its relationship to these ratios was obtained. The results indicate the viability of concentration measurements in reaction zones formed in microscale gas flows.
