STUDIES ON LASER TRANSMISSION DEVICES FOR MINIMALLY INVASIVE MEDICINE

我们研究了用于微创医疗的红外激光传输装置。1.硫化锌包覆银镍空芯波导的研制利用溅射、电镀、腐蚀等技术，成功地制备出了低损耗的硫化锌包覆银镍空芯波导。波导是耐用的，并且可以传输Er：YAG激光的能量为1.6J，这表明开发一种高效的介质涂覆中空波导的制备方法的必要性。2.聚合物涂覆银中空波导的制备方法为了高效地制备长中空波导，已经开发了基于全液相法的新的制造方法，并且聚酰亚胺或氟碳聚合物-获得了用于实际牙科应用的涂银空心玻璃波导。3.“全输送系统”的建议介绍了一种利用空芯波导和输入发射等多种光学器件构成全传输系统的新思想制造耦合器和输出光学元件。输入耦合器由透镜和锥形空芯波导组成，对输入光束的光学失调有很大的容忍度。

We have investigated transmission devices of infrared laser light for minimally invasive medicine. The results obtained under the project are summarized as follows :1.Development of zinc sulfide-coated silver hollow nickel waveguideBased on sputtering, electroplating, and etching techniques, we have successfully fabricated zinc sulfide-coated silver hollow nickel waveguides with small losses. THe waveguides are durable and can transmit Er : YAG laser light with the energy of 1.6 J,which suggests the necessity of developing an efficient fabrication method of dielectric-coated hollow waveguides.2.Fabrication method of polymer-coated silver hollow waveguidesIn order to fabricate long hollow waveguides efficiently, a new fabrication method based on all liquid phase method has been developed and polyimide or fluorocarbon polymer-coated silver hollow glass waveguides have been obtained for practical dental applications.3.Proposal of "Total Delivery System" and design of optical elementsA new idea of total delivery system has been introduced which uses hollow waveguides and several optical devices such as input launching coupler and and output optical elements are fabricated. The input launching coupler is consisting of a lens and tapered hollow waveguides which has large tolerance in optical misalignment of input beam.