2023
DOI: 10.1364/opticaopen.21944099.v1
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Characterization of Transverse Mode Instability with a 4-Quadrant Photodiode

Abstract: Transverse mode instability (TMI) represents the main limitation for the power scaling of fiber laser systems with a diffraction-limited beam quality. In this context, it has become increasingly important to find a cheap and reliable way to monitor and characterize TMI and distinguish this effect from other dynamic perturbations. In this work, with the help of a position-sensitive detector, a novel method is developed to characterize the TMI dynamics even in the presence of power fluctuations. The position inf… Show more

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