Gorbachenya Konstantin, Kisel Viktor, Yasukevich Anatoly, Loiko Pavel, Mateos Xavier, Maltsev Viktor, Leonyuk Nikolai, Aguiló Magdalena, Díaz Francesc, Griebner Uwe, Petrov Valentin, Kuleshov Nikolai
Appl Opt. 2017 Jun 1;56(16):4745-4749. doi: 10.1364/AO.56.004745.
A single-layer graphene saturable absorber is employed for passive Q-switching of an Er, Yb:GdAl(BO) (Er,Yb:GdAB) compact laser, representing the first Er-doped oxoborate laser Q-switched by graphene. This laser is based on a c-cut 1.8 at. % Er, 15 at. % Yb:GdAB crystal diode-pumped at 0.976 μm. It generates a maximum average output power of 360 mW at 1.55 μm with a slope efficiency of 23% (with respect to the incident power). Stable ∼1 μJ/130 ns pulses are achieved at a repetition rate of 400 kHz. This result represents, to the best of our knowledge, the shortest pulse duration ever achieved in bulk Er lasers Q-switched by 2D materials. Graphene is a promising material for generating nanosecond pulses at high repetition rates (MHz range) in Er-doped oxoborate lasers emitting in the eye-safe range at 1.5-1.7 μm.
采用单层石墨烯可饱和吸收体对掺铒、镱的钆铝硼酸盐（Er,Yb:GdAB）紧凑型激光器进行被动调Q，这是首例由石墨烯调Q的掺铒含氧硼酸盐激光器。该激光器基于c切割的1.8原子百分比铒、15原子百分比镱的GdAB晶体，由0.976μm的二极管泵浦。它在1.55μm处产生的最大平均输出功率为360mW，斜率效率为23%（相对于入射功率）。在400kHz的重复频率下实现了稳定的约1μJ/130ns脉冲。据我们所知，这一结果代表了二维材料调Q的块状掺铒激光器所实现的最短脉冲持续时间。石墨烯是一种很有前景的材料，可用于在1.5 - 1.7μm的人眼安全范围内发射的掺铒含氧硼酸盐激光器中以高重复频率（MHz范围）产生纳秒脉冲。
