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Related Experiment Video

Updated: May 27, 2026

Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping

Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping

Published on: March 20, 2017

Variable-diameter refractive beam shaping with freeform optical surfaces.

Paul J Smilie¹, Thomas J Suleski

¹Center for Optoelectronics and Optical Communications, Department of Physics and Optical Science, University of North Carolina at Charlotte, 9201 University City Blvd., Charlotte, North Carolina 28223, USA.

|November 4, 2011

Summary

This summary is machine-generated.

We developed a two-element optical system using freeform surfaces to transform a Gaussian laser beam into a controllable flat-top spot. This beam shaping technology offers adjustable spot sizes for various laser applications.

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Area of Science:

Optics and Photonics
Laser Beam Shaping
Freeform Optics

Background:

Gaussian laser beams have a central intensity peak, limiting applications requiring uniform illumination.
Existing beam shaping methods can be complex or lack adjustability.

Purpose of the Study:

To design a refractive optical system for converting Gaussian laser irradiance into a flat-top profile.
To enable variable control over the output spot diameter.

Main Methods:

Proposed a two-element refractive system utilizing high-order freeform surfaces.
Developed a general design approach for determining the necessary freeform surface profiles.
Investigated lateral translation of elements for beam shaping control.

Main Results:

Demonstrated conversion of Gaussian to flat-top irradiance profiles.
Achieved capability to vary the output spot diameter.
Presented example design results validating the approach.

Conclusions:

The proposed freeform optical system effectively shapes laser beams into adjustable flat-top profiles.
Lateral translation of freeform elements provides a versatile method for beam diameter control.