Abstract
In this research, ion concentration sensing in the electrolyte solution was performed by CARS (coherent anti-Stokes scattering) microscopy using a femtosecond pulsed laser. CARS microscopy realizes high sensitivity, chemically specific and non-intrusive sensing. Sodium sulfate and ammonium chloride solutions are used for measurement and a calibration curve showing the relationship between concentration and CARS intensity was obtained. With the increase in concentration, sodium sulfate solution showed the non-linear increase in CARS intensity at 982 cm^<-1>
