Use of Electric Field Gradients to Access the Spatial Domain in Holeburning Memories
Original Publication Date: 1983-Nov-01
Included in the Prior Art Database: 2005-Feb-07
The performance of a holeburning memory is improved by the use of electric field gradients. By applying an appropriate electric field gradient to the active medium in a holeburning memory, it is possible to Stark shift the inhomogeneous absorption line out of resonance with the laser for all but one (or more) selected spatial locations in the medium. As a result, a pattern of holes representing a bit stream can be burned or read in this location without the need for tightly focussed laser beams or spatial scanning of the beam. Instead, the selected spatial location is scanned by switching the efileric field gradient, which can be done very quickly, that is, in the order of nanoseconds.