Transient temperature field analysis of periodic side-pumped solid-state lasers

• Transient temperature field of DPSSL analyzed under periodic pumping conditions. • Crystal temperature peaks rise gradually, stabilize, and show uniform distribution. • Multidirectional pumping reveals axisymmetric temperature field characteristics. • Study provides methods to optimize thermal effects in side-pumped DPSSL systems. • Insights aid in managing transient thermal effects and lensing in DPSSL applications. For the effective thermal management of a diode-pumped solid-state laser (DPSSL) with periodic pulsing and side-pumping, the transient temperature field of a side-pumped diode-pumped solid-state laser is calculated. The transient temperature field of the DPSSL under periodic pumping is analyzed, and the time-varying characteristics of the transient temperature field of the DPSSL under multidirection pumping are revealed. The results show that the transient temperature of the laser crystal increases rapidly and then decreases slowly in a single pumping period. Upon extending the pumping period, the peak value of the crystal transient temperature increases gradually and eventually becomes constant. After leveling off, the temperature field presents an axisymmetrical distribution that is high in the middle and low in the periphery, which is more uniform than that in the initial pumping stage. This study provides a theoretical basis for modeling and simulating the DPSSL side pump temperature field and provides theoretical support for further research into the transient thermal effects of the DPSSL system.