Holographic light-emitting module and holographic storage system using the same

A holographic light-emitting module, comprising:

• a light source module configured to provide a signal light beam and a reference light beam, wherein a polarization of the signal light beam is orthogonal to a polarization of the reference light beam;
• and
• a light shape control module configured to receive the signal light beam and the reference light beam propagated from the light source module, wherein the signal light beam and the reference light beam are modulated and emitted by the light shape control module, and the signal light beam and the reference light beam are partially overlapped, wherein the light shape control module comprises:
• a light-splitting module configured to receive the signal light beam and the reference light beam propagated from the light source module, and to guide and emit the signal light beam and the reference light beam;
• a first light-guiding module configured to receive the signal light beam propagated from the light-splitting module and to guide the signal light beam back to the light-splitting module;
• a second light-guiding module configured to receive the reference light beam propagated from the light-splitting module and to guide the reference light beam back to the light-splitting module, wherein the signal light beam and the reference light beam guided back to the light-splitting module are propagated toward the same direction from a side of the light-splitting module;
• a half-wavelength plate disposed at the side of the light-splitting module and in an optical path of the reference light baem, thereby enabling the signal light beam and the reference light beam passing through the half-wavelength plate to have the same polarization;
• a first light-blocking component disposed in an optical path of the signal light beam and configured to block a portion of the signal light beam, thereby enabling the signal light beam passing through the first light-blocking component to be a hollow light beam;
• and
• a light-converging module disposed in the optical path of the reference light beam and configured to converge the reference light beam, wherein a cross-sectional area of the converged reference light beam corresponds to a cross-sectional area of the hollow area of the signal light beam, thereby enabling the reference light beam to be surrounded by the signal light beam.