纳秒钬激光碎石系统设计

摘要

In order to improve the lithotripsy rate and degree and reduce the side effects during the process of lithotripsy, nanosecond holmium laser lithotripsy system with high peak power output was designed on the base of electro -optical Q-switched technology .Theoretical analysis was made from the aspects of cooling temperature , transmittance and cavity length.Under the conditions of cooling temperature 22℃, repetition rate 3Hz and pump energy 200J, experimental verification was made .The maximum single pulse energy of 443mJ and pulse width of 90ns were obtained .The lithotripsy system can supply high peak power output of nanosecond holmium laser and can crush the lithosis of any component within short lithotripsy time at high lithotripsy rate and degree .The results demonstrate that the system has high performance and lays the foundation for the next step of industry .%为了提高结石碎石率和粉碎程度、减小碎石过程中副作用，采用电光调Q技术，设计了高峰值功率输出的纳秒钬激光碎石系统。从冷却温度、透过率、腔长等方面进行了理论分析，在冷却温度22℃、重复频率3Hz、抽运能量200J的条件下进行了实验验证，获得了腔内最大单脉冲能量443mJ、脉宽90ns激光输出的数据。结果表明，该系统可输出高峰值功率的纳秒钬激光，碎石时间短，可粉碎任何成分的结石，一次碎石率高，粉碎程度高。这为下一步产业化打下了基础。