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The Performance of Acoustic-Optical Q -switched Mode-Locking 1.34 \mu m Nd:GdVO _{4} Laser

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8 Author(s)
Bai-Tao Zhang ; State Key Lab. of Crystal Mater., Shandong Univ., Ji''nan, China ; Jian-Fei Yang ; He, Jing-liang ; Hai-Tao Huang
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A diode-end-pumped Q -switched mode-locking Nd:GdVO4 laser operating at 1.34 μm with an acousto-optical (AO) Q-switch in a compact V-type cavity was realized in our experiment for the first time. When the AO Q-switch repetition rate was 10 kHz, the maximum average output power of 750 mW and the pulse energy of 75 μ were obtained at the maximum incident pump power of 9 W. The mode-locking modulation depth of about 100% was obtained at certain pump power over the threshold. The mode-locked pulse inside in the Q-switched pulse had a repetition rate of 341 MHz, and its average pulsewidth was estimated to be about 350 ps. A developed rate equation model for the Q -switched and mode-locked lasers with an AO Q-switch were proposed by using the hyperbolic secant functional methods. The results of numerical calculations of the rate equations were in good agreement with the experimental results.

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Quantum Electronics, IEEE Journal of  (Volume:46 ,  Issue: 2 )