Volume 48 Issue 1
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Hu Xing, Cheng Dejiang, Guo Zhiyan, Jiang Menghua, Hui Yongling, Lei Hong, Li Qiang. Highly efficient RTP electro-optic Q-switched Nd: YVO4 laser by end-pumping at 914 nm[J]. Infrared and Laser Engineering, 2019, 48(1): 105001-0105001(5). doi: 10.3788/IRLA201948.0105001
Citation: Hu Xing, Cheng Dejiang, Guo Zhiyan, Jiang Menghua, Hui Yongling, Lei Hong, Li Qiang. Highly efficient RTP electro-optic Q-switched Nd: YVO4 laser by end-pumping at 914 nm[J]. Infrared and Laser Engineering, 2019, 48(1): 105001-0105001(5). doi: 10.3788/IRLA201948.0105001
shu

Highly efficient RTP electro-optic Q-switched Nd: YVO4 laser by end-pumping at 914 nm

doi: 10.3788/IRLA201948.0105001
  • 1.

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

  • Received Date: 2018-08-13
  • Rev Recd Date: 2018-09-17
  • Publish Date: 2019-01-25
  • An electro-optic (EO) Q-switched Nd:YVO4 laser with high repetition rate, end-pumped by continuous-wave (CW) laser diode (LD) was reported. Using RbTiOPO4 (RTP) single crystal as an EO Q-switch, by matching mode of oscillation light and pump light, 1 064 nm laser output with high efficiency, high repetition and short pulse width was realized. On the one hand, low absorption coefficient of 914 nm wavelength was adopted to pump Nd:YVO4 crystal, so that the heat distribution inside the crystal was uniform, thereby achieving high quantum efficiency while reducing the thermal effect. On the other hand, the pump light spot radius was optimized to match mode of pump light and oscillation light. At the repetition rate of 200 kHz, the maximum average output power of 16 W, full width at half maximum of pulses of 9 ns, single pulse energy of 80 J and beam quality M21.2 are achieved at an absorption pump power of 31 W, corresponding to an optical conversion efficiency of 51.6%. To the best of our knowledge, this is the highest efficiency reported on the EO Q-switched laser by using RTP crystals.
  • [1] Fan Haoran, Yu Yongji, Zhu He, et al. 500 kHz A-O Q-switched Nd:YVO4 laser pumped by dual-end ave-locked 878.6 nm laser diode[J]. Infrared and Laser Engineering, 2018, 47(6):0606001. (in Chinese)范灏然, 于永吉, 朱贺,等. 500 kHz波长锁定878.6 nm LD双端泵浦Nd:YVO4声光调Q激光器[J]. 红外与激光工程, 2018, 47(6):0606001.
    [2] Zhu Xiaolei, Tang Hao, Li Xiaoli, et al. Recent progresses of LD pumped solid state lasers with high repetition rate electro-optic Q-switch[J]. Chinese Journal of Lasers, 2009, 36(7):1654-1659. (in Chinese)朱小磊, 唐昊, 李小莉, 等. 高重复频率电光调Q全固态激光器研究进展[J]. 中国激光, 2009, 36(7):1654-1659.
    [3] Li Jingzhao, Chen Zhenqiang, Zhu Siqi. High-peak-power and short-pulse laser with a Yb:YAG/Cr4+:YAG/YAG composite crystal[J]. Infrared and Laser Engineering, 2018, 47(6):0606007. (in Chinese)李景照, 陈振强, 朱思祁. 基于Yb:YAG/Cr4+:YAG/YAG键合晶体的高峰值功率短脉冲激光器[J]. 红外与激光工程, 2018, 47(6):0606007.
    [4] Dai Qin, Cui Jianfeng, Li Yeqiu, et al. Pulse LD pumped kilohertz 1.57m solid-state laser[J]. Infrared and Laser Engineering, 2018, 47(1):0105003. (in Chinese)岱钦,崔建丰,李业秋, 等. 脉冲LD泵浦千赫兹1.57m全固态激光器[J]. 红外与激光工程, 2018, 47(1):0105003.
    [5] Jun Dong, Ken-Ichi Veda, Akira Shirakawa, et al. Composite Yb:YAG/Cr4+:YAG ceramics picosecond microchip lasers[J]. Optics Express, 2007, 15(22):14516-14523.
    [6] Koechner W. Solid-State Laser Engineering[M]. Berlin:Springer, 2013.
    [7] McDonagh L, Wallenstein R, Knappe R. 47 W, 6 ns constant pulse duration, high-repetition-rate cavity-dumped Q-switched TEM00 Nd:YVO4 oscillator[J]. Optics Letters, 2006, 31(22):3303-3305.
    [8] Hong H, Huang L, Liu Q, et al. Compact high-power, TEM00 acousto-optics Q-switched Nd:YVO4 oscillator pumped at 888 nm[J]. Applied Optics, 2012, 51(3):323-327.
    [9] Liu X, Shi Z, Huang Y, et al. Very high repetition-rate electro-optical cavity-dumped Nd:YVO4 laser with optics and dynamics stabilities[J]. Optics Communications, 2015, 336:273-277.
    [10] Peng X, Xu L, Asundi A. Power scaling of diode-pumped Nd:YVO/sub4/lasers[J]. IEEE Journal of Quantum Electronics, 2002, 38(9):1291-1299.
    [11] Sangla D, Castaing M, Balembois F, et al. Highly efficient Nd:YVO4 laser by direct in-band diode pumping at 914 nm[J]. Optics Letters, 2009, 34(14):2159-2161.
    [12] Chang L, Yang C, Yi X J, et al. 914 nm LD end-pumped 31.8 W high beam quality EO Q-switched Nd:YVO4 laser without intracavity polarizer[J]. Laser Physics, 2012, 22(9):1369-1372.
    [13] Zhou Dandan, Yin Xingliang, Wang Yu, et al. High-efficiency electro-optical cavity dumped at 914 nm[J]. Chinese Journal of Lasers, 2018, 45(1):0101013. 周丹丹, 尹兴良, 王煜, 等. 914 nm LD泵浦高效率腔倒空电光调Q激光器[J]. 中国激光, 2018, 45(1):0101013.
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Highly efficient RTP electro-optic Q-switched Nd: YVO4 laser by end-pumping at 914 nm

doi: 10.3788/IRLA201948.0105001
  • 1. Institute of Laser Engineering,Beijing University of Technology,Beijing 100124,China
  • Received Date: 2018-08-13
  • Rev Recd Date: 2018-09-17
  • Publish Date: 2019-01-25

Abstract: An electro-optic (EO) Q-switched Nd:YVO4 laser with high repetition rate, end-pumped by continuous-wave (CW) laser diode (LD) was reported. Using RbTiOPO4 (RTP) single crystal as an EO Q-switch, by matching mode of oscillation light and pump light, 1 064 nm laser output with high efficiency, high repetition and short pulse width was realized. On the one hand, low absorption coefficient of 914 nm wavelength was adopted to pump Nd:YVO4 crystal, so that the heat distribution inside the crystal was uniform, thereby achieving high quantum efficiency while reducing the thermal effect. On the other hand, the pump light spot radius was optimized to match mode of pump light and oscillation light. At the repetition rate of 200 kHz, the maximum average output power of 16 W, full width at half maximum of pulses of 9 ns, single pulse energy of 80 J and beam quality M21.2 are achieved at an absorption pump power of 31 W, corresponding to an optical conversion efficiency of 51.6%. To the best of our knowledge, this is the highest efficiency reported on the EO Q-switched laser by using RTP crystals.

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