Abstract
A simulation method was developed to calculate the thermal focal length for corner-pumped composite slab lasers. Traditional methods assume a uniform heat distribution or an exponential decay heat distribution to simplify the calculation, but the results do not agree well with experimental data for the thermal focal length, which affects the laser resonator design. In the current model, the heat distribution is obtained from the ray trace software Tracepro, which can accurately calculate the pump light absorption distribution in the gain medium. The simulation results with this method have a relative error of 4% compared to experimental results, which is much better than traditional methods with relative errors of 14% for corner-pumped composite slab lasers and demonstrates the effectiveness of this method for the development of new lasers.
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