磁光材料具有磁致旋光效应，能使穿过磁光材料的线偏振光偏振方向发生旋转。因此，本项目基于磁致旋光效应尝试提出磁光调Q技术：利用磁光材料的磁光效应来控制谐振腔中振荡激光的开关状态，实现调Q激光输出。TSAG晶体具有优异的磁光性能和稳定的物理化学性质，本项目拟以TSAG作为磁光晶体进行磁光调Q技术研究。制备高质量TSAG和Nd:TSAG晶体，表征晶体性能；设计和搭建磁光调Q激光实验装置，采用LD泵浦评估调Q激光性能，探索出磁光调Q机制和技术；开展Nd:TSAG晶体调Q器件一体化技术研究，实现磁光自调Q激光输出。通过调Q技术可以产生短脉冲、大能量激光。本项目的开展不仅具有创新性的科学意义，也具有广泛的应用前景。

Magneto-optic materials have magnetic optical rotation effect, which can rotate the polarization direction of line polarized light passing through the magneto-optical material. This project aims to make use of magneto-optical effect of magneto-optical materials to develop an innovative magnetic and optical Q technology. The switching state of the oscillating laser in the resonant cavity is controlled by the magneto-optical effect of magneto optic materials, and the output of Q modulation laser is realized. TSAG crystal has excellent magnetic and optical properties and stable physical and chemical properties, besides, large size and high quality crystals is easy to be grown. In this project, high quality TSAG and Nd:TSAG crystals will be prepared and characterized on the basis of previous work. The Q switched laser experiment device will be designed and built. The property of Q switched laser will be evaluated by LD pump, and the magneto-optic Q switch mechanism and technology would be explored. The integrated technology of Nd:TSAG crystal Q switching device integration will be carried out to realize the self-tuning Q switched laser output. The Q-switch technology is widely used to generate short pulse and large energy laser. Therefore, this project not only has innovative scientific significance, but also has a wide range of application prospects.