High-Resolution Imaging of Cold Atoms through a Multimode Fiber

Abstract

We developed an ultra-compact high-resolution imaging system for cold atoms. Its only in-vacuum element is a multimode optical fiber with a diameter of $230\mu$m, which simultaneously collects light and guides it out of the vacuum chamber. External adaptive optics allow us to image cold Rb atoms with a $\sim 1\mu$m resolution over a $100\times 100\mu$m${}^2$ field of view. These optics can be easily rearranged to switch between fast absorption imaging and high-sensitivity fluorescence imaging. This system is particularly suited for hybrid quantum engineering platforms where cold atoms are combined with optical cavities, superconducting circuits or optomechanical devices restricting the optical access.

arXiv comment5 pages, 3 figures

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Cited by in corpus (1)

• Three-dimensional imaging of single atoms in an optical lattice via helical point-spread-function engineering