Automatic low-order aberration correction based on geometrical optics for slab lasers

Area of Science:

• Optics and Photonics
• Laser Physics
• Optical Engineering

Background:

• Slab lasers are crucial in various applications but suffer from low-order aberrations.
• Beam reshaping and aberration correction are essential for optimizing laser performance.
• Existing methods may lack simultaneous correction and reshaping capabilities.

Purpose of the Study:

• To develop and validate a geometric optics-based method for simultaneous aberration correction and beam reshaping in slab lasers.
• To design a coaxial optical system for precise control over laser beam parameters.
• To achieve significant improvements in beam dimensions and wavefront quality.

Main Methods:

• A coaxial optical system comprising three lenses was designed.
• Lens positions were calculated based on wavefront sensor data and beam parameters.
• Geometric optics principles were applied for aberration correction and beam reshaping.
• Initial beam dimensions (1.8mm x 11mm) and wavefront peak-to-valley (PV) values (tens of microns) were used as input.

Main Results:

• The method successfully reshaped beams to approximately 22mm x 22mm.
• Wavefront peak-to-valley (PV) values were reduced to below 2 μm.
• The system demonstrated effective and precise correction of low-order aberrations.
• Experimental verification confirmed the method's efficacy.

Conclusions:

• The proposed geometric optics method offers an effective solution for simultaneous aberration correction and beam reshaping in slab lasers.
• The coaxial three-lens system provides precise control over beam characteristics.
• This technique significantly enhances laser beam quality and expands potential applications.