中红外光纤激光器用硫系掺杂光纤制备及性能研究

中红外光纤激光器在民事和军事领域具有广泛的用途，已成为国内外研究的热点；产生中红外光纤激光要求基质声子能量低、本征损耗小。目前只有硫系玻璃具有优良的透中远红外和成纤特性，是中红外光纤激光器的理想基质材料。但硫系掺杂光纤基质的提纯、掺杂稀土配位调控、光纤结构损耗、耦合泵浦技术等方面的研究有待深入。本课题拟通过对硫系玻璃中稀土局域环境的调控机理、稀土团簇抑制方法、含镓难蒸馏玻璃的化学反应提纯技术、低结构损耗光纤拉丝参数及泵浦方案的调控优化等基础科学问题进行深入的研究，以获得具有高稀土溶解度的硫系玻璃组分，解决硫系光纤低损耗制备关键技术，研制出用于3~5 μm光纤激光器的高效发光硫系玻璃光纤。通过本项目的研究为今后在理论上设计和开发新型稀土掺杂中红外硫系光纤基质材料提供科学的基础数据和技术支持，具有重要的现实意义。

Mid-infrared fiber lasers with a wide range of uses in civil and military, and has become a hot spot of research at home and abroad. In the generation of mid-infrared fiber lasers the low phonon energy and small intrinsic losses are required. At present，only the chalcogenide glass has excellent transmissivity and fiber-drawing properties is an ideal glass matrix for the preparation of mid-infrared fiber lasers. However, the purification of the rare earth doped chalcogenide fiber matrix, the regulation of the rare earth coordination, the loss of the fiber structure, and the coupling pump technology are need to be further research. In order to obtain the chalcogenide glass with high rare-earth doping property, solve the key technology of low loss in fiber preparation, and obtain the 3~5μm high efficient emissions chalcogenide glass fiber. The following basic scientific problems must be researched in advance: the regulation mechanism of the local area environment, the method of rear earth clusters suppression, the chemical reaction purification technology of the hard distillation glass with gallium content, the low loss fiber drawing parameters control and the optimization of pump plan. This project is of great practical significance, it will provide scientific data and technical support for the future design and development of new rare-earth doped mid-infrared chalcogenide fiber material.