Honghao Xu
Qingdao University
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Publication
Featured researches published by Honghao Xu.
RSC Advances | 2015
Zhongben Pan; Jie Ma; Honghao Xu; Dingyuan Tang; Huaqiang Cai; Haohai Yu; Huaijin Zhang; Jiyang Wang
A diode-pumped passively mode-locked femtosecond Nd:Ca3Gd2(BO3)4 disordered crystal laser has been investigated for the first time, to our knowledge. The passive mode locking of the laser is initiated with a semiconductor saturable absorption mirror (SESAM). Stable mode-locked pulses with 251 fs pulse width, 87 MHz repetition rate, and 37 mW average output power have been demonstrated.
Applied Optics | 2015
Xiaowen Chen; Wenjuan Han; Honghao Xu; Minghui Jia; Haohai Yu; Huaijin Zhang; Junhai Liu
We report on efficient high-power passively Q-switched operation of a Yb:YCa4O(BO3)3 laser with a GaAs crystal plate acting as the saturable absorber. An average output power of 5.7 W at 1032 nm is generated at a pulse repetition rate of 166.7 kHz when the incident pump power is 26.8 W, with a slope efficiency determined to be 24.5%. The averaged pulse energy achieved is roughly 30 μJ and is increased to about 40 μJ when the output coupling used changes from 30% to 50%, while the shortest pulse width is measured to be 153 ns.
Optics Express | 2015
Xiaowen Chen; Lisha Wang; Wenjuan Han; Yunfeng Guo; Honghao Xu; Haohai Yu; Huaijin Zhang; Junhai Liu
High-energy passively Q-switched operation of a Yb:GdCa(4)O(BO(3))(3) laser is demonstrated, with a GaAs crystal plate acting as saturable absorber. An average output power of 1.31 W at 1027 nm is produced at a pulse repetition rate of 1.92 kHz, the resulting pulse energy, duration, and peak power being respectively 0.68 mJ, 9.0 ns, and 75.6 kW. The shortest pulse duration obtained is 4.9 ns; whereas the maximum pulse energy achievable amounts to 0.83 mJ, which proves to be nearly one order of magnitude higher than ever generated from Yb or Nd lasers passively Q-switched by a GaAs saturable absorber.
Laser Physics | 2015
Minghui Jia; Xiaowen Chen; Honghao Xu; Wenjuan Han; Hongying Yi; Yong Wan; Junhai Liu
Efficient stable passively Q-switched operation of an Yb:CNGG disordered garnet laser is demonstrated with a GaAs crystal plate as the saturable absorber. An average output power of 1.76 W is produced at a pulse repetition rate of as high as 166.7 kHz, with optical-to-optical and slope efficiencies of 23.2 and 33%, respectively. The shortest pulse duration achieved was 99.5 ns.
Optical Materials Express | 2017
Lisha Wang; Xiaodan Dou; Wenjuan Han; Honghao Xu; Degao Zhong; Bing Teng; Junhai Liu
We report on efficient repetitively Q-switched laser operation of a miniature Yb:LuPO4 crystal rod with emission wavelengths ranging from 1000 to 1010 nm, at different repetition rates over a range of 1−50 kHz. An average output power of 6.55 W was produced at 50 kHz of repetition rate, with a slope efficiency of 40%; in a low-repetition-rate operation at 2 kHz, the maximum pulsed output power generated was 1.43 W, with pulse energy, duration, and peak power being, respectively, 0.715 mJ, 12.5 ns, and 57.2 kW.
IEEE Photonics Technology Letters | 2016
Junhai Liu; Xiaowen Chen; Wenjuan Han; Honghao Xu; Haohai Yu; Huaijin Zhang
A compact high-energy Yb:YCOB laser passively Q-switched with a GaAs saturable absorber is demonstrated, producing an average output power of 1.02 W at 1022.7 nm, at a pulse repetition rate of 1 kHz, with pulse energy, duration, and peak power being, respectively, 1.02 mJ, 13.6 ns, and 75 kW.
Applied Optics | 2016
Lisha Wang; Wenjuan Han; Zhongben Pan; Honghao Xu; Xiaowen Chen; Junhai Liu; Haohai Yu; Huaijin Zhang
Efficient high-energy passively Q-switched laser operation was demonstrated with Yb:Ca<sub>3</sub>La<sub>2</sub>(BO<sub>3</sub>)<sub>4</sub> disordered crystal, producing an average output power of 3.0 W at 1018.7 nm, at a pulse repetition frequency of 5.0 kHz; the resulting pulse energy, duration, and peak power were 600 μJ, 5.3 ns, and 113.2 kW, respectively.
Chinese Physics Letters | 2018
Xiaodan Dou; Jingnan Yang; Yanjun Ma; Wenjuan Han; Honghao Xu; Junhai Liu
We demonstrate a diode pumped Yb:LuVO 4 laser that can be passively Q-switched by a Cr 4+ :YAG saturable absorber having an initial transmission as high as 99.3%. A maximum pulsed output power of 2.35 W is generated at a repetition rate of 285.7 kHz, approaching or very near the intrinsic upper limit imposed by the recovery time of the Cr 4+ :YAG saturable absorber, and the resulting pulse energy, duration and peak power are, respectively, 8.2 μJ, 39.2 ns and 0.209 kW.
Optical Materials Express | 2017
Hualei Yuan; Lisha Wang; Yanjun Ma; Xiaodan Dou; Wenjuan Han; Honghao Xu; Junhai Liu; Zhongben Pan
We report, for the first time to our knowledge, on the polarized absorption and emission spectra and efficient laser action of the Yb:Sr3La2(BO3)4 disordered crystal. The strongest absorption and emission occur at about 977 nm for polarization direction parallel to the crystallographic b axis, with the peak absorption and emission cross-sections amounting, respectively, to 1.95 × 10−20 and 2.45 × 10−20 cm2. Efficient continuous-wave laser action is demonstrated with a-, b-, and c-cut crystal samples longitudinally pumped by a 976-nm diode laser, producing an output power of up to 8.2 W with an optical-to-optical efficiency of 32% with respect to incident pump power. Depending on the output coupling utilized, the laser action could exhibit a transition from single-polarization oscillation to dual-orthogonal-polarization oscillation at a certain pump level.
Optics and Laser Technology | 2016
Xiaowen Chen; Lisha Wang; Junhai Liu; Yunfeng Guo; Wenjuan Han; Honghao Xu; Haohai Yu; Huaijin Zhang