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Optimization of Passively Q-switched Lasers by Taking into Account Intracavity Laser Spatial Distribution

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Abstract

The intracavity photon density and the initial population-inversion density in the diode-pumped passively Q-switched lasers are assumed to be Gaussian spatial distributions. The space-dependent rate equations are solved numerically. The key parameters of an optimally coupled passively Q-switched laser under Gaussian approximation are determined, and a group of general curves are generated for the first time. These key parameters include the optimal normalized coupling parameter and the optimal normalized saturable absorber parameter that maximize the output energy, and the corresponding normalized energy, normalized peak power, and normalized pulse width. The curves clearly show the dependence of the optimal key parameters on the parameters of the gain medium, the saturable absorber, and the resonator. In addition, the importance including the space variation is also shown. The optimal calculations for a diode-pumped passively Nd: YVO4 laser are presented to demonstrate the use of the curves and the related formulas.

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Authors and Affiliations

  1. School of Information Science and Engineering, Shandong University, Jinan, Shandong Provence, 250100, People’s Republic of China

    Dechun Li, Shengzhi Zhao, Guiqiu Li & Kejian Yang

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  1. Dechun Li
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  2. Shengzhi Zhao
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  3. Guiqiu Li
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  4. Kejian Yang
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Correspondence to Dechun Li.

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Li, D., Zhao, S., Li, G. et al. Optimization of Passively Q-switched Lasers by Taking into Account Intracavity Laser Spatial Distribution. Opt Quant Electron 37, 927–942 (2005). https://doi.org/10.1007/s11082-005-2113-4

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  • DOI: https://doi.org/10.1007/s11082-005-2113-4

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