随着高功率、高亮度激光二极管的迅速发展，全固态超短脉冲激光在先进制造、微纳加工、生物医学、宽带通信、军事和聚变研究等众多领域有着广泛的应用。在高功率半导体激光泵浦条件下，激光晶体同时作为增益介质和克尔介质，在产生飞秒激光的过程中引入了严重的热效应，限制了输出功率的进一步提升。本项目基于光学性能优良的Yb:CGA晶体，提出了将激光增益介质与克尔介质分离的研究方案，建立新型的谐振腔结构模型，系统研究Yb:CGA晶体的掺杂浓度、厚度以及克尔介质的厚度对高功率飞秒激光器的输出波长、激光性能的影响，并利用GTI镜进行谐振腔内的色散补偿，最终实现高功率（>10W）、短脉冲（<100fs）的锁模飞秒激光输出，丰富近红外1μm波段超快激光研究内容，为半导体激光器泵浦的全固态超短脉冲激光发展奠定基础。

Benefiting from the rapid development of the high-power and high-brightness laser diodes(LD)，all-solid-state ultrafast lasers play an important role in the various fields, such as precise detection, micro-nano machining, biomedicine, information communication, military and fusion research. With high-power LD pumping, the laser crystal acts as both gain material and Kerr medium, introducing serious thermal effects in the process of generating femtosecond pulses and limiting the output power. This project is based on excellent Yb:CGA crystal, proposing a research scheme for separating laser gain material and Kerr medium, and establishing a new resonant cavity structure model. Effects of the doping concentrating and thickness of the Yb:CGA and Kerr medium on the output wavelength and performance of high power femtosecond laser will be investigated systematically. Utilizing GTI mirrors for compensating the positive dispersion in the cavity, a stable high-power femtosecond oscillator with more than 10W output power and sub-100fs pulse duration operating at the central wavelength of 1μm will be realized, expanding the research for near-infrared 1μm ultrafast lasers and laying the foundation for the development of LD pumped all-solid-state ultrafast lasers.