2~5μm波段中红外相干光源在分子光谱学、科学研究、生态监测、红外对抗、大气传感及无损伤医学诊断和治疗等诸多领域有重要的应用。本项目将基于过渡金属(TM)激活离子掺杂的Cr2+:ZnSe和Fe2+:ZnSe II-VI硫化物晶体材料,从理论和实验上系统地分析它们的吸收和发射光谱特性，探索有效的激励方式；研究Cr2+:ZnSe晶体的连续波调谐、增益开关和锁模不同模式下的中红外激光输出特性；探索室温下腔内OPO泵浦Fe2+:ZnSe晶体产生中红外激光振荡的可行性。项目将重点研究Cr2+:ZnSe晶体2~3μm波段宽调谐、连续波锁模超短脉冲激光输出。研究结果对探索直接泵浦获得中红外激光从而扩展现有中红外光源技术途径具有重要的科学意义和应用价值。

The coherent sources with tenability range over 2~5μm have potential applications in many fields, such as molecular fingerprint spectroscopy, science research, vtrace gasmonitoring, remote sensing, medicallaser sources for noninvasive medical diagnostics, and numerous military. In this project, based on transition metal (TM)-doped II-VI semiconductor material Cr2+:ZnSe and Fe2+:ZnSe, we well demonstrated the mid-IR lasing characteristics from theoretical and experimental research works, including the characteristics of absorption and emission-gain spectroscopic and more efficient pumping method, lasing operation at continue wave, gain-switched and mode-locked. We also will explore the step of Fe2+:ZnSe laser oscillation at room-temperature by intracavity OPO direct pumping. Particular ,we well mainly focus an Cr:ZnSe lasing broadly tunable and continuous wave mode locked operating with rang of 2~3μm. This project well opens a new pathway of directly pumped mid-IR lasers based on TM-doped materials, as well as shows the divalent transition-metal doped II-VI chalcogenides crystals as promising materials for potential to extending the far IR laser spectral range in future.