The influence of optical molasses in loading a shallow optical trap
arXiv:0811.0410 · doi:10.1103/PhysRevA.79.013418
Abstract
We have examined loading of 85Rb atoms into a shallow Far-Off-Resonance Trap (FORT) from an optical molasses and compared it to loading from a Magneto-Optical Trap (MOT). We found that substantially more atoms could be loaded into the FORT via an optical molasses as compared to loading from the MOT alone. To determine why this was the case, we measured the rate of atoms loaded into the FORT and the losses from the FORT during the loading process. For both MOT and molasses loading, we examined atom load rate and losses over a range of detunings as well as hyperfine pump powers. We found that the losses induced during MOT loading were essentially the same as the losses induced during molasses loading at the same MOT/molasses detuning. In contrast, load rate of the molasses was higher than that of a MOT at a given detuning. This caused the optical molasses to be able to load more atoms than the MOT. Optimization of FORT loading form an optical molasses improved the number of atoms we could trap by a factor of two over that of optimal loading from a MOT.
7 pages, 5 figures
References in corpus (21)
- Observation of resonance condensation of fermionic atom pairs
- All Optical Formation of an Atomic Bose-Einstein Condensate
- Conversion of an Atomic Fermi Gas to a Long-Lived Molecular Bose Gas
- Degenerate Fermi Gases of Ytterbium
- Feshbach resonances in rubidium 87: Precision measurement and analysis
- Ultracold dense gas of deeply bound heteronuclear molecules
- All-Optical Production of a Degenerate Fermi Gas
- Resonant control of elastic collisions in an optically trapped Fermi gas of atoms
- All-Optical Production of Chromium Bose-Einstein Condensates
- Heteronuclear molecules in an optical dipole trap
- Measurement of the Zero Crossing in a Feshbach Resonance of Fermionic 6-Li
- All-Optical Realization of an Atom Laser
- Magnetic field control of elastic scattering in a cold gas of fermionic lithium atoms
- Dense Atom Clouds in a Holographic Atom Trap
- Production of a chromium Bose-Einstein condensate
- Versatile compact atomic source for high resolution dual atom interferometry
- All-optical generation and photoassociative probing of sodium Bose-Einstein condensates
- All-optical production of 7Li Bose-Einstein condensation using Feshbach resonances
- Spatially selective loading of an optical lattice by light-shift engineering using an auxiliary laser field
- All-optical formation of a Bose-Einstein condensate for applications in scanning electron microscopy
- Continuous loading of S calcium atoms into an optical dipole trap