H.J. Qi
Shandong University
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Publication
Featured researches published by H.J. Qi.
Laser Physics | 2009
Jinlong Ma; Y. Li; Yundong Sun; H.J. Qi; R.J. Lan; Xueyuan Hou
By considering both the transversal and longitudinal Gaussian spatial distribution of the intracavity photon density, a couple of rate equations describing a laser-diode end-pumped passively Q-switched Nd:GdVO4 laser with V3+:YAG saturable absorber have been proposed. Solving these space-dependent rate equations numerically, we obtain the dependences of pulse width, pulse repetition rate, single-pulse energy and peak power on pump power. In the experiment, a laser-diode end-pumped Nd:GdVO4 laser passively Q-switched by a V3+:YAG saturable absorber has been realized, and the experimental results are consistent with the theoretical calculations.
Laser Physics | 2010
Y. Li; S. Zhao; Yundong Sun; H.J. Qi
By using both V3+:YAG and Co:LMA saturable absorbers, a doubly passively Q-switched laser is realized for the first time. The shorter pulse with the higher peak power is generated in comparison to the singly passively Q-switched laser with V3+:YAG or Co:LMA saturable absorber. The experimental results shows that it is possible to obtain a shorter pulse with the higher peak power in a doubly passively Q-switched laser.
Laser Physics | 2010
Y. Li; S. Zhao; Yundong Sun; H.J. Qi
By using both V3+:YAG and Co:LMA saturable absorbers, an xenon-lamp-pumped doubly passively Q-switched and mode-locked (QML) Nd:YAG laser at 1.3 μm in a straight cavity is realized for the first time. The modulation depth of QML pulse has nearly reached 100%. The experimental results shows that the doubly passively Q-switched and mode-locked (QML) laser can generate shorter Q-switch envelope pulse with higher average peak power in comparison to the singly passively QML laser with V3+:YAG or Co:LMA saturable absorber.
Laser Physics | 2010
Y. Li; S. Zhao; Yundong Sun; H.J. Qi; G.H. Zhang
An xenon-lamp-pumped passively Q-switched and mode-locked (QML) Nd:YAG laser with Co:LMA saturable absorber at 1.3 μm is realized in a straight cavity. The modulation depth of mode locking pulse has reached 100%. The pulse energy and the pulse width of QML laser have been measured. The pulse width of the mode-locking laser is estamated to be 940 ps.
Laser Physics Letters | 2007
H.J. Qi; X-M Liu; Xueyuan Hou; Yongfu Li; Y. Sun
Laser Physics Letters | 2008
Jinlong Ma; Yongfu Li; Yundong Sun; H.J. Qi; R.J. Lan; Xueyuan Hou
Optics and Laser Technology | 2011
Yunchu Li; S. Zhao; Yundong Sun; H.J. Qi; Kang Cheng
Laser Physics Letters | 2007
H.J. Qi; Y. Sun; X-M Liu; Xueyuan Hou; Yufei Li
Laser Physics Letters | 2008
Jinlong Ma; Yunfeng Li; Yundong Sun; H.J. Qi; R.J. Lan; Xueyuan Hou
Laser Physics Letters | 2008
Jinlong Ma; Yunfeng Li; Yundong Sun; H.J. Qi; R.J. Lan; Xueyuan Hou
