Multifunctional laser-delivery system for all types of medical lasers

我们研究了中空纤维和输送系统的医疗应用。该系统适用于对人体具有不同消融特性的所有CO2激光器、CO激光器、Er：YAG激光器和Nd：YAG激光器。纤维很细，因此具有很高的柔韧性。中空纤维的各种输出装置被研究用于各种医疗用途。对于牙科来说，这些设备经过改进，使其功能强大。本研究取得了以下成果：（1）基于空心波导的输出装置的研制对于空心光纤的医疗应用，输出端应密封，以防止光纤内部的水分和烧蚀碎屑进入。我们开发了一些中空纤维的密封技术。一种简单且低成本的技术是用聚合物膜密封端部，通过将端部浸入聚合物溶液并干燥以形成密封膜。对于更高的能量阈值，玻璃帽由派热克斯玻璃和石英玻璃制成。通过改变密封端的形状，帽盖表现出聚焦效应，在聚焦点处提供更高的能量密度。这些密封装置适用于牙科和泌尿外科应用。(2)用于CO_2、CO、Er：YAG和准分子激光器的中空光纤及用于中空光纤的输入和输出器件的开发。开发了用于CO_2、CO、Er：YAG和准分子激光器的低损耗中空光纤。还开发了适用于各种医疗应用的光纤输出装置。在结石破碎实验中对石英玻璃密封帽进行了测试，结果表明，采用该密封帽的中空纤维具有良好的性能。

We investigated hollow fibers and delivery system for medical applications. The system is applicable to all of CO2 lasers, CO lasers, Er:YAG lasers and Nd:YAG lasers having different ablation properties for human body. The fibers are so thin that they have high flexibility. Various output devices for hollow fibers are investigated for variety of medical uses. For dentistry, the devices are improved to make them highly functional. Output devices for urology are also designed and developed.The following results were obtained in this research:(1) Development of output devices based on hollow waveguidesFor medical applications of hollow fibers, the output end should be sealed to keep moisture and ablated debris from the inside of the fibers. We developed some sealing techniques for hollow fibers. An easy and low-cost technique is to seal the end with a polymer film, By dipping the end to polymer solution and dry it to form a sealing film. For higher energy threshold, glass caps made of Pyrex and silica glass are developed. By changing the shape of the sealed end, the cap show focusing effect to give higher energy density at the focus spot. These sealed devices are applied to the both of dentistry and urological applications.(2) Hollow fibers for CO2, CO, Er:YAG and excimer lasers and development of input and output devices for hollow fibers.Hollow fibers which show low-loss properties for CO2, CO, Er:YAG and excimer lasers were developed. Output devices for the fibers which applicable to variety of medical applications were also developed. A sealing cap made of silica glass was tested in calculus fragmentation experiment and the result showed the high capability of the hollow fiber with the sealed devices.