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Proceedings Paper

Optimization of the peak power of Q-switched diode-pumped lasers
Author(s): Yan Ye; Shiyu Wang; Zhen Guo; Jianguo Wen; Defang Cai
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Paper Abstract

The Q-switching technique of LD pumped Nd:YAG laser with high repetition and short pulse-width was studied. According to the theoretical and experimental research, the way to obtain the optimal pulse parameters was presented, which is the theoretical and experimental base for increasing peak power and decreasing pulse width of a Q-Switched laser output pulse. It is of great value for the research of light source of the laser space communication and laser imaging. Q-switching technique is the key technique of the output pulse of DPL. By using the rate equations, the numerical solution for the trace of a giant pulse and simple expression for the peak power are derived. Therefore the crucial factors of the peak power and the pulse width are the ratio of the initial to the final population inversion ni/nt and the photon decay time tc. As ni/nt increases and the tc decreases, the peak power goes up and the pulse width goes down. From which the optimal parameters of an output pulse can be obtained. According to the analysis above, the way to obtain the optimal pulse parameters was put forward as follows. The power of pumping LD should be as high as possible, while the resonator length as small as possible, and the corresponding optimum reflector should also be selected.

Paper Details

Date Published: 12 May 2004
PDF: 7 pages
Proc. SPIE 5280, Materials, Active Devices, and Optical Amplifiers, (12 May 2004); doi: 10.1117/12.523002
Show Author Affiliations
Yan Ye, Xidian Univ. (China)
Shiyu Wang, Xidian Univ. (China)
Zhen Guo, Xidian Univ. (China)
Jianguo Wen, Xidian Univ. (China)
Defang Cai, Xidian Univ. (China)

Published in SPIE Proceedings Vol. 5280:
Materials, Active Devices, and Optical Amplifiers
Connie J. Chang-Hasnain; Dexiu Huang; Yoshiaki Nakano; Xiaomin Ren, Editor(s)

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