Optimization of the peak power of Q-switched diode-pumped lasers

Yan Ye; Shiyu Wang; Zhen Guo; Jianguo Wen; Defang Cai

doi:10.1117/12.523002

12 May 2004 Optimization of the peak power of Q-switched diode-pumped lasers

Yan Ye, Shiyu Wang, Zhen Guo, Jianguo Wen, Defang Cai

Proceedings Volume 5280, Materials, Active Devices, and Optical Amplifiers; (2004) https://doi.org/10.1117/12.523002
Event: Asia-Pacific Optical and Wireless Communications, 2003, Wuhan, China

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 n_i/n_t and the photon decay time t_c. As n_i/n_t increases and the t_c 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.

Citation Download Citation

Yan Ye, Shiyu Wang, Zhen Guo, Jianguo Wen, and Defang Cai "Optimization of the peak power of Q-switched diode-pumped lasers", Proc. SPIE 5280, Materials, Active Devices, and Optical Amplifiers, (12 May 2004); https://doi.org/10.1117/12.523002

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