Real-time determination of laser beam quality by modal decomposition

TL;DR

This paper introduces a rapid, all-optical method for real-time measurement of laser beam quality using modal decomposition, aligning with ISO standards, and enabling analysis under previously inaccessible conditions.

Contribution

The paper presents a novel, fast, all-optical technique for real-time laser beam quality measurement via modal decomposition, conforming to ISO standards.

Findings

Method provides real-time measurement of M2 beam quality.

Technique is simple, fast, and allows analysis under new conditions.

Results align with ISO standard measurements.

Abstract

We present a real-time method to determine the beam propagation ratio M2 of laser beams. The all-optical measurement of modal amplitudes yields M2 parameters conform to the ISO standard method. The experimental technique is simple and fast, which allows to investigate laser beams under conditions inaccessible to other methods.