Design And Simulation Of Er:YAG Laser Therapeutic Instrument For Dentistry

Er: YAG laser is widely used in dentistry. The paper has developed a new laser therapeutic instrument for dentistry. It can incise and drill in tooth in place of tooth drill. The paper has set forth the basic theory of EnYAG laser; And designed a whole laser device, including laser rod, flash lamp, optical collector and optical resonator, optical fiber; And designed a set of PWM switch power supply; And designed a set of micro-computer control system for the laser instrument.For optimizing the power supply circuit, and receiving optimization of parameter, the power supply circuit has been simulated by PSPICE software. In simulation, set up transformer and VMOSFET model, and confirmed the correctness of circuit. For the parameter that it is difficulty to calculate and measure, confirm their value by simulation, and affirm the accuracy of simulation method.