Computational model for operation of 2 mum co-doped Tm,Ho solid state lasers

Area of Science:

• Laser physics and materials science
• Computational modeling and simulation
• Solid-state laser engineering

Background:

• Co-doped thulium (Tm) and holmium (Ho) solid-state lasers are crucial for various applications.
• Understanding energy conversion and thermal effects is vital for optimizing laser performance.
• Previous models often simplified thermal dissipation and energy transfer mechanisms.

Purpose of the Study:

• To develop a comprehensive computational model for co-doped Tm,Ho solid-state lasers.
• To investigate the energy conversion pathways and thermal dissipation in Tm,Ho:YLF lasers.
• To analyze the impact of thermal effects on laser performance, including giant pulse energy and thermal lensing.

Main Methods:

• Coupling an 8-level rate equation model with TEM00 laser beam distribution.
• Incorporating a complex heat dissipation model into the simulation.
• Performing simulations for Q-switched giant pulse generation in Tm,Ho:YLF lasers.

Main Results:

• Approximately 43% of diode-pumped energy is converted to heat within the crystal.
• About 45% of energy is lost as spontaneously emitted radiation from specific energy levels.
• Simulations show temperature increase leads to decreased giant pulse energy and induced thermal lensing in high-power operation.

Conclusions:

• The developed model accurately predicts thermal effects in Tm,Ho:YLF lasers.
• Efficient heat management is critical for maintaining high giant pulse energy and minimizing thermal lensing.
• Further optimization of laser design and cooling is necessary for high-power applications.