Endoscopic imaging of quantum gases through a fiber bundle

Abstract

Abstract: We use a coherent fiber bundle to demonstrate the endoscopic absorption imaging of
quantum gases.We show that the fiber bundle introduces spurious noise in the picture mainly due
to the strong core-to-core coupling. By direct comparison with free-space pictures, we observe
that there is a maximum column density that can be reliably measured using our fiber bundle,
and we derive a simple criterion to estimate it. We demonstrate that taking care of not exceeding
such maximum, we can retrieve exact quantitative information about the atomic system, making
this technique appealing for systems requiring isolation form the environment.