论文部分内容阅读
石墨烯具有饱和恢复时间极短、导热性好、吸收带宽、损耗低、成本低廉且容易制备等优点,被认为是光电子应用中理想的半导体可饱和吸收体材料,近几年受到广泛的关注。介绍了本课题组最近在石墨烯锁模超快全固体激光器研究中取得的一些进展。在用液相剥离方法成功制备出尺寸大于20μm的石墨烯薄片的基础上,将其应用于全固态Nd∶GdVO4激光器,实现了脉宽16 ps、平均功率360 mW的锁模激光输出,单脉冲能量为8.4 nJ;继而在宽带增益介质Yb∶KGW晶体中又实现了脉宽为489 fs的超快激光,平均功率564 mW。
Graphene has the advantages of extremely short saturation recovery time, good thermal conductivity, low absorption bandwidth, low loss, low cost and easy preparation. It is considered as an ideal semiconductor saturable absorber material in optoelectronic applications and has drawn wide attention in recent years. The recent progress made by our research group in the research of graphene mode-locked ultrafast all-solid-state lasers is introduced. Based on the successful fabrication of graphene sheets with size larger than 20μm by liquid phase strip method, the system is applied to all-solid-state Nd: GdVO4 laser and the mode-locked laser output with pulse width of 16 ps and average power of 360 mW is achieved. Energy of 8.4 nJ; and then in the broadband gain medium Yb: KGW crystal pulse width of 489 fs again to achieve an ultra-fast laser, the average power of 564 mW.