The Master 2 internship aims at conceiving, realizing and testing a tunable optical lattices. The conception of the optical system realizing the tunable lattice will carefully consider optimizing the lattice depth and homogeneity, as well as easing the tuning of the lattice configuration on the experiment. Numerical calculations of the physical parameters of the tunable lattice in the various configurations (e.g. tunnelling amplitude, on-site interaction energy) will be realized, to prepare the appropriate choice of parameters of the future studies. A substantial part of the internship will be dedicated the experimental characterization of the laser source used to create the tunable lattice. A self-heterodyne interferometer will be built on a test bench to precisely measure the phase noise of the laser, the latter being the most sensitive property affecting the lattice potential that results from interferences between retroflected laser beams.