An optical lattice with single lattice site optical control for quantum engineering
We resolve and address atoms in single sites of an optical lattice with a period of 5.3 µm created by a retroreflected, focused CO2 laser beam. In this one-dimensional lattice, the Lamb-Dicke limit can be fulfilled in all three spatial dimensions. Because of the negligible decoherence rate from spontaneous photon scattering such a lattice offers unique possibilities for the study of quantum phenomena in a controllable environment.
Special features of speckle-modulated laser fields arising at in vitro measurements of different types of human cataractous lenses have been investigated experimentally. Computer analysis of digital images has allowed for estimation of destruction of the spatial coherence of a laser beam scattered by a turbid lens. Applied speckle-technologies have permitted the range of retinal angular resolution to be estimated with the help of laser retinometer at the stage of preoperative cataract diagnosis. An extent of laser retinometry at measuring visual acu9ity in patients with any type of cataract, and an incorrectness of its estimation by means of opto types charts have been set up.