Design, simulation, and experimental validation of a segmented beam-shaping integrator mirror

Area of Science:

• Optics and Photonics
• Laser Technology
• Computational Design

Background:

• Uniform laser intensity distribution is critical for applications like material processing.
• Existing beam-shaping methods may lack precision or scalability for high-power lasers.

Purpose of the Study:

• To design, simulate, and experimentally validate a segmented beam-shaping integrator mirror.
• To transform a standard laser beam into a uniform line-shaped spot with high accuracy.

Main Methods:

• Developed a geometric optics computational method using Python to determine segment parameters.
• Modeled the design in SolidWorks and simulated performance using Zemax ray tracing.
• Experimentally validated the design with a 4 kW fiber laser system.

Main Results:

• Calculated unique parameters for 7 parabolic segments for a specific design case.
• Simulations predicted a shaped spot closely matching the 20 mm target size.
• Experimental validation confirmed a measured spot size of 20.39 mm x 1.41 mm, matching simulations.

Conclusions:

• The segmented integrator mirror design method is effective for creating high-performance beam-shaping optics.
• The fabrication process successfully produced optics suitable for high-power laser systems.
• This approach offers a viable solution for achieving uniform intensity distribution in laser applications.