High-resolution digital control of highly multimode laser

TL;DR

This paper introduces a digital control method for multimode lasers using a spatial light modulator, enabling high-resolution beam shaping with adjustable coherence, phase, and intensity for advanced laser applications.

Contribution

It presents a novel digital phase-only control technique for multimode lasers, allowing precise shaping and reshaping of laser beams with high resolution and variable coherence.

Findings

High-resolution shaped laser beams can be generated with controlled coherence.

Laser beam reshaping is efficient after propagation.

The method enables versatile beam control for various applications.

Abstract

A rapid and efficient method for generating laser beams with controlled intensity, phase and coherence distributions is presented. It is based on a degenerate cavity laser in which a digital phase-only spatial light modulator is incorporated. We show that a variety of unique and high-resolution shaped laser beams can be generated with either a low or a high spatial coherence. We also show that by controlling the phase, intensity and coherence distributions, a laser beam can be efficiently reshaped after propagation.