Experiments with a fiber-based optical dipole trap for cold Cs-Atoms

In the setup, such an optical nanofiber with a diameter of 500 nm is used to create a dipole trap potential for cold cesium atoms with a depth of a few hundred μK and a lifetime of 50 ms. The trapping potential realizes a 1d optical lattice via the evanescent fields of two far-detuned trapping lasers, working at 780 nm and 1064 nm and a total power of around 30 mW.