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arXiv · 1910.03086

A fiber-based beam profiler for high-power laser beams in confined spaces and ultra-high vacuum

Christian Brand·Ksenija Simonović·Filip Kiałka·Stephan Troyer·Philipp Geyer·Markus Arndt
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Abstract

Laser beam profilometry is an important scientific task with well-established solutions for beams propagating in air. It has, however, remained an open challenge to measure beam profiles of high-power lasers in ultra-high vacuum and in tightly confined spaces. Here we present a novel scheme that uses a single multi-mode fiber to scatter light and guide it to a detector. The method competes well with commercial systems in position resolution, can reach through apertures smaller than $500\times 500$~$\mu$m$^2$ and is compatible with ultra-high vacuum conditions. The scheme is simple, compact, reliable and can withstand laser intensities beyond 2~MW/cm$^2$.

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Christian Brand, Ksenija Simonović, Filip Kiałka, Stephan Troyer, Philipp Geyer, Markus Arndt. 2019-10-04. A fiber-based beam profiler for high-power laser beams in confined spaces and ultra-high vacuum. https://doi.org/10.1364/oe.387650

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