过渡金属离子掺杂微晶玻璃微结构光纤光放大和激光特性研究

Due to restrictions of the rare earth ion luminescence properties, the rare earth ions doped microstructure fiber is generally difficult to be applied in ultra-wideband fiber amplifiers and tunable fiber laser. This project was putted forward in order to the goal of realization high and wide gain bandwidth, good physic-chemical properties, high strength and low loss transition metal ions doped glass-ceramic microstructure fiber. Firstly, through theoretical analysis of the large mode transition metal ions doped microstructure fiber; we will grasp the relationship between the fiber laser characteristics and structural parameters. Secondly, through the capillary force conditions which the capillary maintain the original duty cycle, high-temperature melt fluid dynamics equations model will be established；Then, high strength and low loss transition metal ions doped glass-ceramic microstructure fiber will be achieved by solving the matching between cladding materials and nano- glass ceramic core in the refractive index, expansion coefficient, softening temperature etc and optimizing of microstructure fiber drawing process. Finally, ultra-broadband and high gain optical amplification will be realized by understanding the relationship between pump wavelength, fiber length, doping ion species and concentration, fiber geometry and the optical spectra.

过渡金属掺杂微晶玻璃微结构光纤结合微结构光纤的大模场单模特性、耐热特性和过渡金属离子的宽带激光特性，能有效解决掺稀土微结构光纤在超宽带光纤放大器和可调谐光纤激光器的应用上限制。本项目以过渡金属离子掺杂微结构光纤为研究对象，实现具有增益高、带宽宽和物化性能好的高强度低损耗过渡金属离子掺杂微晶玻璃微结构光纤为研究目标。拟通过大模场掺过渡金属离子微结构光纤的理论分析，掌握光纤激光特性与结构参数之间的变化规律；系统研究毛细管保持原来占空比情况的受力情况，建立微结构光纤毛细管高温熔体的流体动力学方程模型；解决包层材料与微晶玻璃纤芯在折射率、膨胀系数、软化温度等方面的匹配问题，优化微结构光纤拉丝工艺，获得高强度低损耗的过渡金属离子掺杂微晶玻璃光纤微结构；探明泵浦波长、光纤长度、掺杂离子种类浓度和光纤几何结构与光纤光谱性质之间的关系，实现超宽带、高增益的激光放大。

过渡金属掺杂微晶玻璃微结构光纤结合微结构光纤的大模场单模特性、耐热特性和过渡金属离子的宽带激光特性，能有效解决掺稀土微结构光纤在超宽带光纤放大器和可调谐光纤激光器的应用上限制。本项目以过渡金属离子掺杂微结构光纤为研究对象，实现具有增益高、带宽宽和物化性能好的高强度低损耗过渡金属离子掺杂微晶玻璃微结构光纤为研究目标。拟通过大模场掺过渡金属离子微结构光纤的理论分析，掌握光纤激光特性与结构参数之间的变化规律；系统研究毛细管保持原来占空比情况的受力情况，建立微结构光纤毛细管高温熔体的流体动力学方程模型；解决包层材料与微晶玻璃纤芯在折射率、膨胀系数、软化温度等方面的匹配问题，优化微结构光纤拉丝工艺，获得高强度低损耗的过渡金属离子掺杂微晶玻璃光纤微结构；探明泵浦波长、光纤长度、掺杂离子种类浓度和光纤几何结构与光纤光谱性质之间的关系，实现超宽带、高增益的激光放大。