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

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${}^2$.

References in corpus (6)

• Testing the limits of quantum mechanical superpositions
• A Kapitza-Dirac-Talbot-Lau interferometer for highly polarizable molecules
• Diffraction of complex molecules by structures made of light
• A universal matter-wave interferometer with optical ionization gratings in the time domain
• An atomically thin matter-wave beamsplitter
• Dual-wavelength fiber Fabry-Perot cavities with engineered birefringence

Cited by in corpus (2)

• Bragg diffraction of large organic molecules
• Diffracting molecular matter-waves at deep-ultraviolet standing-light waves