从双波长激光运转及和频的机理出发，对LD泵浦Nd∶YAG，LBO腔内和频500．8nm青光激光器所使用的光学薄膜进行了设计和制备．在激光反射镜的设计上，为了达到最佳的和频输出，对膜系要求进行了深入分析．采用对谐振腔一端面反射率固定不变并通过对另一腔镜基频光的透射率进行调谐的方法，在给出合理初始结构后，利用计算机对膜厚进行了优化．并采用双离子束溅射沉积的方法，通过时间监控膜厚法成功制备出青光激光器所使用的全介质激光反射膜，在室温下实现946nm和1064nm双波长连续运转，并通过Ⅰ类临界相位匹配LBO晶体腔内和频在国内首次实现500．8nm青色激光连续输出．当泵浦注入功率为1．4W时和频青光最大输出达20mW．

Based on dual-wavlength action and sum-frequency-mixing theory,a series of optical thin film for LD pumped Nd∶YAG crystal,LBO intracavity sum-frequency-mixing 500.8 nm laser are designed and manufactured. To obtain optimum output power,the coating design of resonator mirror is analysized. The method that adjusts one resonator facet reflectivity for fundament laser by fixing the other resonator facet reflectivity is used,by computer thin film optimization methods based on the reasonable starting desing.The dielectric high reflective laser mirror for 500.8 nm laser is achieved by double ion beam sputter technique,which is controlled by a time-power monitoring method. An optimized CW 500.8 nm laser at room temperature is obtained for the first time in China. The maximum laser output power of 20 mW is obtained when a incident pump laser of 1.8 W is used.