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Micro lensing induced lineshapes in a single mode cold-atom hollow-core fiber interface

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arxiv 1805.11391 v1 pith:ZE5TW6OA submitted 2018-05-29 physics.atom-ph physics.opticsquant-ph

Micro lensing induced lineshapes in a single mode cold-atom hollow-core fiber interface

classification physics.atom-ph physics.opticsquant-ph
keywords interfacecold-atomfiberhollow-corelensinglinemicromode
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We report on the observation of strong transmission line shape alterations in a cold-atom hollow-core fiber interface. We show that this can lead to a significant overestimation of the assigned resonant optical depth for high atom densities. By modeling light beam propagation in an inhomogeneous dispersive medium, we attribute the observations to micro lensing in the atomic ensemble in combination with the mode selection of the atom-fiber interface. The approach is confirmed by studies of Rydberg EIT line shapes.

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