In this paper we describe a test of Bell inequalities using a non- maximally
entangled state, which represents an important step in the direction of
eliminating the detection loophole. The experiment is based on the creation of
a polarisation entangled state via the superposition, by use of an appropriate
optics, of the spontaneous fluorescence emitted by two non-linear crystals
driven by the same pumping laser.Comment: proc. of QCM&C, Capr