钬、镨双掺杂氟化镥锂晶体2.9μm中红外激光特性研究

项目名称： 钬、镨双掺杂氟化镥锂晶体2.9μm中红外激光特性研究

项目编号： No.61308042

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 无线电电子学、电信技术

项目作者： 张百涛

作者单位： 山东大学

项目金额： 26万元

中文摘要： 2.9μm波段激光在军事、生物、医学和科学研究等领域具有重要应用。本项目拟对具有潜在应用价值的钬、镨双掺杂氟化镥锂晶体（Ho3+,Pr3+:LiLuF4）进行探索：从理论和实验上系统地分析Ho3+、Pr3+离子掺杂浓度对其吸收和发射光谱的影响，特别是对激光上能级和下能级荧光寿命的影响，研究其中红外发光和多声子弛豫特性，探索最佳掺杂浓度；研究Ho,Pr:LLF晶体在2.9 μm波段处的连续波、主被动调Q开关和锁模不同模式下的中红外激光输出特性；研究2.9 μm（5I6→5I7）和2.1 μm （5I7→5I8）级联跃迁输出特性；重点研究Ho,Pr:LLF晶体2.9 μm波段石墨烯锁模超短脉冲激光输出特性。本项目着眼于稀土氟化物晶体基础研究，将晶体物理和激光器优化设计相结合，研究结果对探索理想中红外激光晶体材料，扩展现有中红外光源技术途径等方面具有重要的科学意义和应用价值。

中文关键词： 2.9 μm；Ho;Pr:LLF晶体；新型二维材料；被动调Q；连续波锁模

英文摘要： In recent years, mid-IR (MIR) lasers operating around 2.9 μm have attracted much attention for numerous applications in biological, medical and sensing technologies because of the vibrational absorption band of water in this spectral region. It can also be used in efficient and high quality pump sources for longer wavelength MIR lasers and optical parametric oscillator. In this project, we proposed to investigate the optical and laser properties of Pr3+ and Ho3+ ions co-doped Ho3+,Pr3+:LiLuF4 fluoride crystal. We will well demonstrate the mid-IR lasing characteristics from theoretical and experimental researches, including the influence of doping concentration of Ho3+ and Pr3+ ions on the characteristics of absorption and emission spectroscopic, the mid-IR light emission and multi-phonon relaxation, 2.9 μm laser operation at continuous wave, active or passive Q-switched and mode-locked regimes. We will also explore the cascading output properties for 2.9 and 2.1 μm. We well mainly focus at lasing broadly tunable and continuous wave mode locked operating in the rang of 2.8-3.02 μm. This project will connect crystal physics and laser technique together for basic research on rare earth ions doped fluoride crystals. The results well open a new pathway of directly pumped MIR lasers, as well as extends the MIR laser t

英文关键词： 2.9 μm；Ho;Pr:LLF laser crystal；Noval 2D material；Passive Q-switching；CW mode locking