Volume 46 Issue 2
Mar.  2017
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Li Zhitong, Yu Haoyang, Cheng Siqi, Jiang Menghua, Hui Yongling, Lei Hong, Li Qiang. Energy storage optimization of grazing incident Nd: YVO4 slab oscillator pumped by pulsed laser diode[J]. Infrared and Laser Engineering, 2017, 46(2): 205003-0205003(5). doi: 10.3788/IRLA201746.0205003
Citation: Li Zhitong, Yu Haoyang, Cheng Siqi, Jiang Menghua, Hui Yongling, Lei Hong, Li Qiang. Energy storage optimization of grazing incident Nd: YVO4 slab oscillator pumped by pulsed laser diode[J]. Infrared and Laser Engineering, 2017, 46(2): 205003-0205003(5). doi: 10.3788/IRLA201746.0205003
shu

Energy storage optimization of grazing incident Nd: YVO4 slab oscillator pumped by pulsed laser diode

doi: 10.3788/IRLA201746.0205003
  • 1.

    Institute of Laser Engineering,Beijing University of Technology,Beijing 100124,China

  • Received Date: 2016-06-06
  • Rev Recd Date: 2016-07-07
  • Publish Date: 2017-02-25
  • Parasitic oscillation in the slab amplifier affects the efficiency of laser amplifier and reduces the stored energy of slab crystal. The surface of Nd:YVO4, gain of grazing incident slab amplifier was processed to suppress the parasitic oscillation in the slab and improve the energy storage ability of slab crystal. Through ion sputtering method, the germanium was plated on top and bottom surface and the back surface to suppress the parasitic oscillation. In germanium plated and without germanium plated conditions, the slab oscillator's output characteristics were compared between free oscillation and Q-switched mode, threshold current reduced 15% in plating germanium slab oscillator, and the stored energy improved 86.9%. The beam quality, pulse duration and spot pattern of plating germanium slab oscillator were basically the same to without plating germanium slab oscillator in Q-switched mode. Experimental result indicates plating germanium on the face of slab is an effective method to suppress the parasitic oscillation and improve the energy storage ability of crystal.
  • [1] Morgenweg J, Eikema K S. Tailored pulse sequences from an 880 nm pumped Nd:YVO4 bounce amplifier[J]. Opt Lett, 2012. 37(2):208-210.
    [2] Yoshino T, Seki H, Tokizane Y, et al. Efficient high-quality picosecond Nd:YVO4 bounce laser system[J]. Opt Soc Am B, 2013, 30(4):894.
    [3] Abe M, Seki H, Kowa M, et al. High average power, diffraction-limited picosecond output from a sapphire face-cooled Nd:YVO4 slab amplifier[J]. Opt Soc Am B, 2015, 32(4):714-718.
    [4] Kaskow M, Zendzian W, Jabczynski J K, et al. Diffraction-limited, grazing-incidence Nd:YVO4 slab laser side pumped by 2D laser diode stack[C]//SPIE, 2014, 9441:94410F-94410F-8.
    [5] Meng Peibei, Yan Fanjiang, Li Xu, et al. Influence of boundary condition and pump scheme on thermal effects of laser crystal[J]. Infrared and Laser Engineering, 2015, 44(11):3216-3222. (in Chinese)蒙裴贝, 颜凡江, 李旭,等. 热边界和泵浦结构对激光晶体热效应的影响[J]. 红外与激光工程, 2015, 44(11):3216-3222.
    [6] Koechner W. Solid-state Laser Engineering[M]. Berlin:Springer, 1999:165-169.
    [7] Cheng Xiaojin, Xu Jianqiu. Research on parasitic oscillation in slab amplifiers[J]. Acta Optica Sinica, 2007, 27(10):1827-1830. (in Chinese)程小劲, 徐剑秋. 板条激光放大器中寄生振荡的研究[J]. 光学学报, 2007, 27(10):1827-1830.
    [8] Cheng Xiaojin, Xu Jianqiu. Thermal effect on parasitic oscillation in solid-state slab laser[J]. Infrared and Laser Engineering, 2007, 36(Z1):310-313. (in Chinese)程小劲, 徐剑秋. 固体激光器中热效应对晶体介质寄生振荡的影响[J]. 红外与激光工程, 2007, 36(Z1):310-313.
    [9] Damzen M J, Trew M, Rosas E, et al. Continuous-wave Nd:YVO4 grazing incidence laser with 22.5 W output power and 64% conversion efficiency[J]. Optics Communications, 2001, 196(1):237-241.
    [10] Arun Kumar S, Shailendhar S, Supriyo S, et al. Zigzag slabs for solid-state laser amplifiers:Batch fabrication and parasitic oscillation suppression[J]. Applied Optics, 2006, 45(14):3340-3351.
    [11] Hu Junjiang, Meng Tao, Wen Lei, et al. Experiment investigation on residual stress of Nd:Glass edge cladding[J]. Chinese Journal of Lasers, 2015, 42(2):172-178. (in Chinese)胡俊江, 孟涛, 温磊, 等. 激光钕玻璃包边残余应力实验研究[J]. 中国激光, 2015, 42(2):172-178.
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Energy storage optimization of grazing incident Nd: YVO4 slab oscillator pumped by pulsed laser diode

doi: 10.3788/IRLA201746.0205003
  • 1. Institute of Laser Engineering,Beijing University of Technology,Beijing 100124,China
  • Received Date: 2016-06-06
  • Rev Recd Date: 2016-07-07
  • Publish Date: 2017-02-25

Abstract: Parasitic oscillation in the slab amplifier affects the efficiency of laser amplifier and reduces the stored energy of slab crystal. The surface of Nd:YVO4, gain of grazing incident slab amplifier was processed to suppress the parasitic oscillation in the slab and improve the energy storage ability of slab crystal. Through ion sputtering method, the germanium was plated on top and bottom surface and the back surface to suppress the parasitic oscillation. In germanium plated and without germanium plated conditions, the slab oscillator's output characteristics were compared between free oscillation and Q-switched mode, threshold current reduced 15% in plating germanium slab oscillator, and the stored energy improved 86.9%. The beam quality, pulse duration and spot pattern of plating germanium slab oscillator were basically the same to without plating germanium slab oscillator in Q-switched mode. Experimental result indicates plating germanium on the face of slab is an effective method to suppress the parasitic oscillation and improve the energy storage ability of crystal.

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