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

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• 作者：Josep Maria Serres ; Pavel Loiko ; Xavier Mateos…
• 关键词：Ytterbium lasers ; Gallium garnets ; Graphene ; Q ; switching
• 刊名：Optical and Quantum Electronics
• 出版年：2016
• 出版时间：March 2016
• 年：2016
• 卷：48
• 期：3
• 全文大小：1,026 KB
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• 作者单位：Josep Maria Serres (1)
  Pavel Loiko (1) (2)
  Xavier Mateos (1) (3)
  Haohai Yu (4)
  Huaijin Zhang (4)
  Junhai Liu (5)
  Konstantin Yumashev (2)
  Uwe Griebner (3)
  Valentin Petrov (3)
  Magdalena Aguiló (1)
  Francesc Díaz (1)
  
  1. Física i Cristal·lografia de Materials i Nanomaterials (FiCMA-FiCNA), Universitat Rovira i Virgili (URV), Campus Sescelades, c/Marcel·lí Domingo, s/n., 43007, Tarragona, Spain
  2. Center for Optical Materials and Technologies, Belarusian National Technical University, 65/17 Nezavisimosti Ave., 220013, Minsk, Belarus
  3. Max Born Institute for Nonlinear Optics and Short Pulse Spectroscopy, Max-Born-Str. 2a, 12489, Berlin, Germany
  4. State Key Laboratory of Crystal Materials, Shandong University, Jinan, 250100, China
  5. College of Physics, Qingdao University, 308 Ning-Xia Road, Qingdao, 266071, China
  
• 刊物主题：Optics, Optoelectronics, Plasmonics and Optical Devices; Electrical Engineering; Characterization and Evaluation of Materials; Computer Communication Networks;
• 出版者：Springer US
• ISSN：1572-817X

文摘

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.