Q-switching of Yb:YGG, Yb:LuGG and Yb:CNGG lasers by a graphene saturable absorber

被引：0
作者：
Josep Maria Serres
Pavel Loiko
Xavier Mateos
Haohai Yu
Huaijin Zhang
Junhai Liu
Konstantin Yumashev
Uwe Griebner
Valentin Petrov
Magdalena Aguiló
Francesc Díaz
机构：
[1] Universitat Rovira i Virgili (URV),Física i Cristal·lografia de Materials i Nanomaterials (FiCMA
[2] Belarusian National Technical University,FiCNA)
[3] Max Born Institute for Nonlinear Optics and Short Pulse Spectroscopy,Center for Optical Materials and Technologies
[4] Shandong University,State Key Laboratory of Crystal Materials
[5] Qingdao University,College of Physics
来源：
Optical and Quantum Electronics | 2016年 / 48卷
关键词：
Ytterbium lasers; Gallium garnets; Graphene; Q-switching;
D O I：
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学科分类号：
摘要：
Yb:YGG, Yb:LuGG and Yb:CNGG compact diode-pumped lasers at 977 nm are passively Q-switched by a CVD-grown single layer graphene saturable absorber. With Yb:CNGG crystal, 190 ns/1.9 μJ pulses are generated at a repetition frequency of 235 kHz. This represents the highest pulse energy extracted from any graphene Q-switched Yb laser. The maximum average output power is 440 mW at 1045.1 nm with 24 % slope efficiency. With the Yb:YGG laser, the maximum output power reaches 462 mW at 1039.8 nm and the Q-switching conversion efficiency is as high as 55 %. Graphene is promising for generation of nanosecond pulses in Q-switched bulk Yb lasers at the frequencies approaching the MHz range.
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