Junhai Liu

Summary

Publications

  1. ncbi request reprint Improvement of passive Q-switching performance reached with a new Nd-doped mixed vanadate crystal Nd:Gd0.64Y0.36VO4
    Junhai Liu
    National Laboratory of Crystal Materials, Shandong University, Jinan 250100, China
    Opt Lett 28:2330-2. 2003
  2. ncbi request reprint Low quantum defect laser oscillation of a new mixed Yb0.009:Y0.575Gd0.416VO4 crystal
    Junhai Liu
    College of Physics, Qingdao University, Qingdao, China
    Opt Express 16:17729-34. 2008
  3. ncbi request reprint Anisotropy in laser performance of Yb:GdCa4O(BO3)3 crystal
    Junhai Liu
    College of Physics, Qingdao University, Ning Xia Road 308, Qingdao 266071, China
    Appl Opt 47:5436-41. 2008
  4. ncbi request reprint Bistable laser operation of a Yb0.0054:Y0.3481Gd0.6465VO4 mixed crystal
    Junhai Liu
    College of Physics, Qingdao University, Qingdao, China
    Opt Lett 33:1810-2. 2008
  5. ncbi request reprint Output-coupling-dependent polarization state of a continuous-wave Yb:YCa4O(BO3)3 laser
    Junhai Liu
    College of Physics, Qingdao University, Ning Xia Road 308, Qingdao 266071, China
    Opt Lett 32:2909-11. 2007
  6. ncbi request reprint Efficient high-power laser operation of Yb:KLu(WO4)2 crystals cut along the principal optical axes
    Junhai Liu
    College of Physics, Qingdao University, Ning Xia Road 308, Qingdao 266071, China
    Opt Lett 32:2016-8. 2007
  7. ncbi request reprint Efficient passively Q-switched laser operation of Yb in the disordered NaGd(WO4)2 crystal host
    Junhai Liu
    College of Physics, Qingdao University, China
    Opt Lett 32:1728-30. 2007
  8. ncbi request reprint Continuous-wave and pulsed laser performance of Nd:LuVO4 crystal
    Junhai Liu
    National Laboratory of Crystal Materials, Shandong University, Jinan 250100, China
    Opt Lett 29:168-70. 2004
  9. doi request reprint Efficient high-energy passively Q-switched Yb:GdCa4O(BO3)3 laser
    Junhai Liu
    College of Physics, Qingdao University, Qingdao, China
    Appl Opt 52:2676-81. 2013
  10. doi request reprint The potential of Yb:YCa4O(BO3)3 crystal in generating high-energy laser pulses
    Junhai Liu
    College of Physics, Qingdao University, Ning Xia Road 308, Qingdao 266071, China
    Opt Express 21:9365-76. 2013

Collaborators

  • Huaijin Zhang
  • Wenjuan Han
  • Qibiao Dai
  • Kui Wu
  • Shuxian Wang
  • Xueping Tian
  • Zhichao Zhou
  • Yicheng Wang
  • Linhua Xia
  • Haohai Yu
  • Hongying Yi
  • Jiayin Huang

Detail Information

Publications18

  1. ncbi request reprint Improvement of passive Q-switching performance reached with a new Nd-doped mixed vanadate crystal Nd:Gd0.64Y0.36VO4
    Junhai Liu
    National Laboratory of Crystal Materials, Shandong University, Jinan 250100, China
    Opt Lett 28:2330-2. 2003
    ..4 kHz with an optical conversion efficiency of 23.2%, and the slope efficiency was determined to be 45.5%. The resulting pulse energy, peak power, and pulse width were 181 microJ, 26.6 kW, and 6.8 ns, respectively...
  2. ncbi request reprint Low quantum defect laser oscillation of a new mixed Yb0.009:Y0.575Gd0.416VO4 crystal
    Junhai Liu
    College of Physics, Qingdao University, Qingdao, China
    Opt Express 16:17729-34. 2008
    ..55 W with optical-to-optical and slope efficiencies of 19% and 32%, respectively. At longer wavelengths where the pi-polarized oscillation exhibited higher gain, the output power reached 2.5 W, with a slope efficiency of 41%...
  3. ncbi request reprint Anisotropy in laser performance of Yb:GdCa4O(BO3)3 crystal
    Junhai Liu
    College of Physics, Qingdao University, Ning Xia Road 308, Qingdao 266071, China
    Appl Opt 47:5436-41. 2008
    ..The most efficient laser operation is obtained with the y-cut crystal, generating a cw output power of 7.35 W at 1083-1085 nm with an optical-to-optical efficiency of 63%, the slope efficiency being as high as 84%...
  4. ncbi request reprint Bistable laser operation of a Yb0.0054:Y0.3481Gd0.6465VO4 mixed crystal
    Junhai Liu
    College of Physics, Qingdao University, Qingdao, China
    Opt Lett 33:1810-2. 2008
    ..9-3.4 W in terms of absorbed pump power, in which the coexistence and switching of the sigma and pi polarization states occur accompanied by wavelength shifting upon decreasing the pump power...
  5. ncbi request reprint Output-coupling-dependent polarization state of a continuous-wave Yb:YCa4O(BO3)3 laser
    Junhai Liu
    College of Physics, Qingdao University, Ning Xia Road 308, Qingdao 266071, China
    Opt Lett 32:2909-11. 2007
    ..15 W at 1084.3 nm (E||x) and 3.45 W at 1061.3 nm (E||z). The slope efficiency for output couplers with transmission in the 0.5%-2% range was 81%-83%...
  6. ncbi request reprint Efficient high-power laser operation of Yb:KLu(WO4)2 crystals cut along the principal optical axes
    Junhai Liu
    College of Physics, Qingdao University, Ning Xia Road 308, Qingdao 266071, China
    Opt Lett 32:2016-8. 2007
    ..A maximum output power of 11.0 W was produced from a 2 mm thick uncoated N(g)-cut crystal in a approximately 7 mm long plano-concave resonator end pumped by a fiber-coupled diode; the corresponding optical-to-optical efficiency was 68%...
  7. ncbi request reprint Efficient passively Q-switched laser operation of Yb in the disordered NaGd(WO4)2 crystal host
    Junhai Liu
    College of Physics, Qingdao University, China
    Opt Lett 32:1728-30. 2007
    ..67 kW. In continuous-wave operation, the Yb:NaGd(WO(4))(2) laser yielded an output power of 5.5 W with an optical-optical efficiency of 51%...
  8. ncbi request reprint Continuous-wave and pulsed laser performance of Nd:LuVO4 crystal
    Junhai Liu
    National Laboratory of Crystal Materials, Shandong University, Jinan 250100, China
    Opt Lett 29:168-70. 2004
    ..1%. The pulse energy and peak power reach 138 microJ and 16.2 kW, respectively, at a pulse repetition frequency of 25 kHz under a pump power of 14.2 W; the pulse duration is 8.5 ns...
  9. doi request reprint Efficient high-energy passively Q-switched Yb:GdCa4O(BO3)3 laser
    Junhai Liu
    College of Physics, Qingdao University, Qingdao, China
    Appl Opt 52:2676-81. 2013
    ..5 kHz when the pump power absorbed is 7.7 W, with a slope efficiency determined to be 40%. The laser pulse generated is 10.0 ns in duration, with pulse energy as high as 420 μJ and peak power amounting to 42 kW...
  10. doi request reprint The potential of Yb:YCa4O(BO3)3 crystal in generating high-energy laser pulses
    Junhai Liu
    College of Physics, Qingdao University, Ning Xia Road 308, Qingdao 266071, China
    Opt Express 21:9365-76. 2013
    ..3 ns in duration, with the energy being as high as 476 μJ and the peak power amounting to 51.2 kW. The results demonstrated in this work reveal the great potential of this crystal in developing high-energy compact pulsed lasers...
  11. doi request reprint Highly efficient Q-switched laser operation of Yb:Y3Ga5O12 garnet crystal
    Junhai Liu
    College of Physics, Qingdao University, Ning Xia Road 308, Qingdao 266071, China
    Opt Express 21:2624-31. 2013
    ..0%, with an output power measured to be 2.56 W, the resulting pulse energy, duration, and peak power being 140.8 μJ, 5.9 ns, and 23.9 kW, respectively...
  12. doi request reprint Efficient laser operation of Yb:Lu3Ga5O12 garnet crystal
    Junhai Liu
    College of Physics, Qingdao University, 308 Ning Xia Road, Qingdao 266071, China
    Opt Lett 37:2388-90. 2012
    ..Laser pulses of 26 ns duration are generated with a pulse energy of 91 μJ and peak power of 3.5 kW...
  13. ncbi request reprint Laser oscillation of Yb:KLu(WO4)2 crystal polarized along the N(g) principal optical axis
    Junhai Liu
    College of Physics, Qingdao University, Ning Xia Road 308, Qingdao 266071, China
    Opt Express 16:4960-4. 2008
    ..A continuous-wave output power of 0.55 W was obtained at 1044 nm for an absorbed pump power of 1.44 W, leading to optical-to-optical and slope efficiencies of 38% and 52%, respectively...
  14. ncbi request reprint Polarized laser oscillation of isotropic disordered Yb:Ca3(NbGa)(2-x)Ga3O12 crystal
    Junhai Liu
    College of Physics, Qingdao University, Ning Xia Road 308, Qingdao 266071, China
    Opt Express 16:12201-6. 2008
    ..35 W at a pulse repetition frequency of 16.7 kHz, with a slope efficiency of 37%; the laser pulse energy, duration, and peak power amount to 81 microJ, 25 ns, and 3.24 kW, respectively...
  15. doi request reprint Spectral and lasing investigations of Yb:YSGG crystal
    Shuxian Wang
    State Key Laboratory of Crystal Materials and Institute of Crystal Materials, Shandong University, Jinan 250100, China
    Opt Express 21:16305-10. 2013
    ..The laser emission spectrum shifts to shorter wavelengths as the transmission of the output coupler varies from 3% to 20%, a result that can be explained based on the effective gain cross-sections of Yb:YSGG...
  16. doi request reprint Passive Q-switching laser performance of Yb:Gd3Ga5O12 garnet crystal
    Wenjuan Han
    College of Physics, Qingdao University, Qingdao, China
    Appl Opt 52:4329-33. 2013
    ..5 kHz, the optical-to-optical and slope efficiencies being, respectively, 45% and 61%. Laser pulses of 140 μJ in energy and 5.8 ns in duration were also obtained at 22.2 kHz, with a corresponding peak power amounting to 24.1 kW...
  17. ncbi request reprint Improvement in continuous-wave laser performance of disordered Yb:CNGG crystal
    Zhichao Zhou
    College of Physics, Qingdao University, Qingdao, China
    Appl Opt 51:4042-6. 2012
    ..5 mm thick crystal end pumped by a diode laser, generating an output power of 5.15 W with an optical-to-optical efficiency of 46%, whereas the slope efficiency amounts to 80%...
  18. ncbi request reprint Continuous-wave laser performance of Nd:LuVO4 crystal operating at 1.34 microm
    Huaijin Zhang
    National Laboratory of Crystal Materials and Institute of Crystal Materials, Shandong University, Jinan 250100, China
    Appl Opt 44:7439-41. 2005
    ..5%. Laser experiments of Nd3+ concentration of 0.5 and 0.9 at. % a-cut crystal LuVO4 samples were also investigated; due to the strong excited-state absorption of Nd:LuVO4 at 1.34 microm, the output power was limited...