被动锁模微片固体超短脉冲激光是超快激光领域的研究热点，掺Yb离子的激光晶体因荧光带宽宽、容易与半导体激光泵浦源配合等特性，成为1微米波段超短脉冲激光实现的主要材料。本项目将采用课题组生长的多个掺Yb离子四钼酸盐及改性四钼酸盐晶体作为研究对象，针对该类型晶体双折射自调谐性质、激光性能特点和天然解离特性，通过对上述不同类型激光晶体热效应理论研究、晶体的特殊加工技术、谐振腔的优化、氧化石墨烯/石墨烯饱和吸收体的制作方法、双折射自调谐特性和整体实验技术方案等内容的创新研究，在国际上首次采用掺Yb离子四钼酸盐晶体及氧化石墨烯/石墨烯等饱和吸收体进行自调谐超快微片皮秒到飞秒激光输出实验研究。本项目研究成果将丰富小型微片超快激光技术理论和实验方法，填补国内外在该项领域中的研究空白，获得自主知识产权，并最终发展1-2种具有潜在应用前景的新型小型化全固体超短脉冲激光器。

Solid ultrashort pulse laser of passive mode-locking microchip crystal is a hot research field of ultrafast laser, Yb - doped laser crystals are the preferred material of ultrashort pulse laser because of its advantages of wavelength of 1μm. This project will use the many kinds of Yb-doped four molybdate and four modified molybdate crystals grown by our group as the research object. According to properties of the crystal self-tuning, characteristics of coefficient of thermal conductivity and characteristics of natural liberation,we will systematically research on the thermal effect of laser crystal, special processing technique of crystal, optimization of resonant cavity, saturable absorber manufacture method of graphene oxide / graphene, characteristics of birefringence self-tuning wavelength and innovation research of the overall laser experimental technology, and so on.In the world ,we first apply saturable absorber of graphene oxide / graphene to research of ultrafast ps-fs microchip laser output experiment due to the properties of crystal self-tuning.The study will enrich the ultrafast laser theory and experimental methods of microchip laser crystal and fill the research gaps at home and abroad in this area, and finally develop 1-2 novel all solid state ultra short pulse laser of miniaturizing and potential application prospect.