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Chinese Physics, 2004, Vol. 13(6): 871-876    DOI: 10.1088/1009-1963/13/6/015
CLASSICAL AREAS OF PHENOMENOLOGY Prev   Next  

Theoretical and experimental investigations of quasi-continuous wave diode array side-pumped Yb:YAG slab laser

Wu Hai-Sheng (吴海生), Yan Ping (闫平), Gong Ma-Li (巩马理), Liu Qiang (柳强)
Department of Precision Instruments, Tsinghua University, Beijing 100084, China
Abstract  An analytical model of quasi-continuous wave (quasi-CW) diode array side-pumped slab laser for Yb:YAG oscillator in long-pulse free-running has been developed based on the CW model. In this model we first introduce a new parameter, pump pulse width, and make the model available for use in the quasi-CW model. We also give an analytical equation of laser delay time to calculate the laser pulse width. A detailed model is also presented for a new structure laser design, taking account of the geometry of Yb:YAG slab. A quasi-CW diode array side-pumped Yb:YAG slab laser is investigated theoretically and experimentally. Experiments yield a quasi-CW output energy up to 20.36 mJ with the laser pulse width of 654.55 μs at 1049 nm when the diode arrays operate at 25 Hz and 1 ms pulse width. The crystal dimensions are 3 mm×8 mm×1 mm and the doping density is 10 at.%. The experimental results are in good agreement with the predictions of the theoretical model.
Keywords:  quasi-continuous wave diode array side-pumped      Yb:YAG      laser delay time      pump pulse width      lensduct  
Received:  24 September 2003      Revised:  05 February 2004      Accepted manuscript online: 
PACS:  42.55.Rz (Doped-insulator lasers and other solid state lasers)  
  42.55.Xi (Diode-pumped lasers)  
  42.60.By (Design of specific laser systems)  
  42.60.Jf (Beam characteristics: profile, intensity, and power; spatial pattern formation)  
  42.60.Rn (Relaxation oscillations and long pulse operation)  
  42.60.Da (Resonators, cavities, amplifiers, arrays, and rings)  

Cite this article: 

Wu Hai-Sheng (吴海生), Yan Ping (闫平), Gong Ma-Li (巩马理), Liu Qiang (柳强) Theoretical and experimental investigations of quasi-continuous wave diode array side-pumped Yb:YAG slab laser 2004 Chinese Physics 13 871

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