The performance optimization of Pr:YLF single longitudinal mode laser under the pre-lase technology

An evaluation model for optimizing system parameters was established in this study using longitudinal-mode pre-lase selection technology. By solving the rate equation and calculating the evaluation function, we determined the evaluation efficiency of a single-longitudinal-mode operation using this scheme. The optimal condition for the characteristics of the single-longitudinal Q-switched laser was also analytically calculated in detail. We observed that the evaluation function derived using the two-step signal of the Q-switch modulation time and other resonator parameters significantly influenced the output characteristics of the single-longitudinal-mode Q-switched laser operation. Furthermore, the experimental results were consistent with the simulations.