半导体激光直接泵浦钛宝石激光器技术

项目名称： 半导体激光直接泵浦钛宝石激光器技术

项目编号： No.61308037

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： 王向林

作者单位： 中国科学院西安光学精密机械研究所

项目金额： 26万元

中文摘要： 现有的钛宝石激光振荡器采用连续绿光固体激光器泵浦，其结构复杂、能量转化效率低、价格昂贵、体积大。随着半导体激光器（LD）技术的快速发展，LD直接泵浦钛宝石激光器已成为可能。因LD体积小有利于整合到激光振荡器中，不仅可使激光振荡器结构紧凑、体积减小，而且光学元件的高度集成可减轻温度、震动等不利因素的影响，可使激光振荡器的稳定性提高。本项目将研究蓝光LD直接泵浦钛宝石的基础理论，分析钛宝石对蓝光LD的吸收、转化效率和锁模运转等重要过程；探讨泵浦光和激光振荡器输出激光的模式匹配问题；合理设计蓝光LD泵浦钛宝石激光振荡器的腔型参数；探索多束激光同时泵浦钛宝石锁模技术。在此基础上，构建蓝光LD泵浦的钛宝石激光振荡器，实现连续和锁模运转；通过参数优化提高锁模激光输出功率，达到可实用化的飞秒脉冲激光器。最终探索一种易于小型化、能量转换效率高、价格大幅降低的超短脉冲激光产生技术。

中文关键词： 超快激光；钛宝石激光器；LD直接泵浦；克尔透镜锁模；飞秒脉冲

英文摘要： At present, CW green solid laser is used to pump Ti:sapphire laser, which is complex structure, low conversion efficiency, high price, large size. With the development of the semiconductor laser, diode-laser(LD) directly pumped Ti:sapphire laser become possible. Because the size of LD is very small, it can be integrated into Ti:sapphire oscillator. By doing this, we can not only makes the oscillator more compact, but also decreases the unfavorable effects of temperature, shocking, and so on. As a result, the stabilization of the oscillator would be greatly improved. In this research, the basic theory of blue diode-laser (LD) directly pumped Ti:sapphire laser will be studied, the absorption process, conversion efficiency, modelocking mechanism will be analyzed, mode matching between pump and output laser will be investigated,cavity parameters of the oscillator will be designed; muti-beam pumping configuration will be researched. The blue LD pumped Ti:sapphire oscillator will be built up and modelocking operation will be implemented. In addition, the power of modelocked laser will be improved by optimizing parameters. Therefore,the femtosecond laser can be practical. At last, ultrashort pulse laser generation technology will be achieved, which bears the virtue of miniaturization, high energy conversion efficienc

英文关键词： Ultrafast lasers；Ti:sapphire laser；LD direct pumping；Kerr-lens modelocking；femtosecond pulses