Tunable Nd, La: SrF2 laser and passively Q-switched operation based on gold nanobipyramids saturable absorber
Feng Zhang(张峰)1,2, Hua-Nian Zhang(张华年)1,2, Dan-Hua Liu(刘丹华)1, Jie Liu(刘杰)1,2, Feng-Kai Ma(马凤凯)3, Da-Peng Jiang(姜大朋)3, Si-Yuan Pang(逄思远)3, Liang-Bi Su(苏良碧)3, Jun Xu(徐军)4
1 Shandong Provincial Key Laboratory of Optics and Photonic Device, School of Physics and Electronics, Shandong Normal University, Jinan 250014, China; 2 Institute of Data Science and Technology, Shandong Normal University, Jinan 250014, China; 3 Synthetic Single Crystal Research Center, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 201800, China; 4 Key Laboratory of Transparent and Opto-functional Inorganic Materials, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 201800, China
Abstract A novel Nd, La:SrF2 disordered crystal is prepared, and its continuous-wave wavelength tuning operation is performed for the first time. Employing a surface plasmon resonance (SPR) based gold nanobipyramids (G-NBPs) saturable absorber, we obtain a compact diode-pumped passively Q-switched Nd, La:SrF2 laser. The stable Q-switched pulse operates with the shortest pulse duration of 1.15 μs and the maximum repetition rate of 41 kHz. The corresponding single pulse energy is 2.24 μJ. The results indicate that G-NBPs could be a promising saturable absorber applied to the diode-pumped solid state lasers (DPSSLs).
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