Modeling of 980 nm and 1470 nm Laser Radiation Absorbance Efficiency in the Blood Vessel Depending on the Structure of Titanium–Containing Optothermal Fiber Converter

Using quartz fiber with titanium-containing optothermal fiber converter (TOTFC) is promising in endovenous laser coagulation (EVLA) for the treatment of varicose veins. This study aims to research the variation in the optical properties of TOTFC as its microstructure changes under the condition that TiO2 spheres inside converter are arranged in such a way that the Mie theory approximation can be applied. The absorbance efficiency of laser energy with 980 nm and 1470 nm wavelengths for TOTFC has been calculated. Optical multidimensional simulation for the EVLA process was developed and calculated. The optimal ranges of microstructure’s parameters for TOTFC in the EVLA process were discussed.