Fluorescence losses from Yb:YAG slab lasers.

Area of Science:

• Laser Physics
• Materials Science

Background:

• High-power solid-state lasers are essential for various applications.
• Yb:YAG lasers are a key technology in this field.
• Efficient design of these lasers requires understanding internal optical processes.

Purpose of the Study:

• To investigate the distribution of fluorescence emitted from slab-shaped Yb:YAG lasers.
• To analyze how different slab geometries and surface conditions affect fluorescence emission.
• To provide insights for optimizing the design of high-power slab lasers.

Main Methods:

• Modeling fluorescence emission from different slab geometries (Brewster end-faced, rectangular parallelepiped).
• Considering various boundary conditions: air, water, or coatings on slab faces.
• Analyzing the fraction of fluorescence emitted through each face and its spatial distribution.

Main Results:

• The distribution of emitted fluorescence varies significantly with slab shape and surface properties.
• The fraction of fluorescence escaping through each face is dependent on geometry and coatings.
• Spatial distribution and emission directionality are critical factors influenced by these parameters.

Conclusions:

• The geometric configuration and surface treatment of Yb:YAG slabs critically impact fluorescence emission.
• These factors are paramount for the effective design and performance optimization of high-power solid-state lasers.
• Detailed analysis of fluorescence distribution is essential for advancing laser technology.