Numerical simulation and experimental studies of longitudinally excited miniature solid-state lasers

Area of Science:

• Physics
• Laser Technology
• Materials Science

Background:

• Miniature solid-state lasers are crucial for various applications.
• Understanding their transient response is key to optimizing performance.
• Existing models may not fully capture the dynamics of these compact systems.

Purpose of the Study:

• To develop and validate a numerical model for the transient response of longitudinally pumped miniature solid-state lasers.
• To assess the model's applicability to both regenerative amplifiers and single-mode oscillators.
• To investigate methods for overcoming power limitations in these laser systems.

Main Methods:

• Development of a numerical model for laser transient response.
• Simulation of a neodymium-doped yttrium aluminum garnet (Nd:YAG) laser pumped by a diode laser array.
• Comparison of model predictions with experimental measurements of peak output power and pulse width.
• Exploration of neodymium-doped glass (Nd:glass) laser amplifiers.

Main Results:

• The numerical model accurately predicts the transient behavior of the Nd:YAG laser.
• Calculated peak output powers and pulse widths align well with experimental data.
• The model predicts saturation effects at higher peak powers due to lower laser level filling.
• Nd:glass amplifiers show potential for boosting single-frequency Nd:YAG pulses to over 200 W.

Conclusions:

• The presented numerical model is a valuable tool for analyzing and optimizing miniature solid-state lasers.
• Saturation is an inherent limitation in current Nd:YAG systems, requiring alternative amplification strategies.
• Nd:glass amplifiers offer a viable pathway to achieve significantly higher output powers for specific applications.