Optimization of 4Hz medical ruby laser power system with dual cavities using multi-resonant converter

In almost all industrial site, various laser systems have been widely applied because of their characteristics such as high energy density, directivity and coherence. Nowadays the clinical application has become wider in medical parts such as incurable disease, diagnosis etc. Ruby laser has the greatest efficacy for removing tattoos, freckle and other skin problem. But commercial medical ruby laser system has the maximum repetition rate of 2Hz and optical output beam energy of 1J. Medical doctors want to have a high repetition ruby laser system to reduce the operation time. We investigated a new ruby laser power system having high repetition rate of 4Hz through dual cavities. In addition, we develop a new power supply system adopting zero voltage switching(ZVS) to minimize switching loss by LLC resonant converter designed by 2kW.