| Autor: |
Mielec, N., Altorio, M., Sapam, R., Holleville, D., Sidorenkov, L. A., Landragin, A., Geiger, R., Horville, D. |
| Předmět: |
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| Zdroj: |
Applied Physics Letters; 10/15/2018, Vol. 113 Issue 16, pN.PAG-N.PAG, 5p, 5 Graphs |
| Abstrakt: |
The uniformity of the intensity and the phase of laser beams is crucial to high-performance atom interferometers. Inhomogeneities in the laser intensity profile cause contrast reductions and systematic effects in interferometers operated with atom sources at micro-Kelvin temperatures and detrimental diffraction phase shifts in interferometers using large momentum transfer beam splitters. We report on the implementation of a so-called top-hat laser beam in a long-interrogation-time cold-atom interferometer to overcome the issue of inhomogeneous laser intensity encountered when using Gaussian laser beams. We characterize the intensity and relative phase profiles of the top-hat beam and demonstrate its gain in atom-optic efficiency over a Gaussian beam, in agreement with numerical simulations. We discuss the application of top-hat beams to improve the performance of different architectures of atom interferometers. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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