Abstract
Coaxial random-access reading in multilayered optical data storage using a pair of counter-propagating pulse-shaped spatial solitons was experimentally investigated. Counter-propagating second-harmonic spatial solitons, which are formed by focusing titanium sapphire pulsed lasers, induced nonlinear collision and determined the depth readout address in a strontium barium niobate crystal. The nonlinear interaction between the collision and the locally-reversed crystal domains, which represents single-bit data, changed the spectrum and intensity of the transmitted second-harmonic beam. Coaxial random-access reading associated with the spatial soliton of the multilayered bit datum was demonstrated by scanning collision points along the direction of the depth.
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