A single high resolution holographic pickup, for reading/writing both a CD
and DVD optical recording medium, has an electrical tuning control for
applying a DC and AC signal to a tunable Bragg cell, which AC is phase
locked with respect to the fundamental repetition frequency of the
recorded data on the CD to produce accurate tracking. A special high
resolution holographic lens is recorded within the Bragg cell that
focuses the light signals read off of the optical storage mediums upon a
pickup detector, and its focal length is varied to read a selected CD and
or DVD from a group of CDs or DVDs in response to changes in the DC
applied to the Bragg cell. The holographic lens within the Bragg cell is
formed by an interference pattern produced by interfering light emitted
from the tip of a one micron optical fiber and a plane broad light beam.