The primary task of university education is to stimulate students’ autonomic learning and cultivate students' creative thinking. This paper put to use problem based learning (PBL) teaching mode, to enable students master flexible knowledge as the goal, and a detailed analysis of the implementation method and concrete measures of PBL teaching reform in the course of Laser Principle and Application, then compared with the former teaching methods. From the feedback of students and teaching experience, we get good teaching effect and prove the feasibility of PBL teaching mode in practice.
The paper analyses the overall performance parameters, operation principle, and general structure of a double wavelength (1064nm and 532nm) laser device for Laser skin resurfacing and treatment. The instrument uses solid state Laser with the energy ofper pulse 400mJ or 200Mj, the width ofpulse of 8-iOns and the density of light spot of 12. 8J/cm2 or 6.4J/cm2. Discussion is made carefully for the design of solid laser power supply, and fundamental intelligent controlling systems. Reliability and security design is also analyzed particularly.