Single beam write and/or replay of spatial heterodyne holograms

Thomas, Clarence E.; Hanson, Gregory R.

Single beam write and/or replay of spatial heterodyne holograms

Patent · Mon Nov 19 23:00:00 EST 2007

OSTI ID:919901

Thomas, Clarence E. ^[1]; Hanson, Gregory R. ^[2]

Knoxville, TN
Clinton, TN

A method of writing a spatially heterodyne hologram having spatially heterodyne fringes includes: passing a single write beam through a spatial light modulator that digitally modulates said single write beam; and focusing the single write beam at a focal plane of a lens to impose a holographic diffraction grating pattern on the photorefractive crystal, the holographic diffraction grating pattern including the spatially heterodyne hologram having spatially heterodyne fringes, wherein only said single write beam is incident on said photorefractive crystal without a reference beam. A method of replaying a spatially heterodyne hologram having spatially heterodyne fringes at a replay angle includes: illuminating a photorefractive crystal having a holographic diffraction grating with a beam from a laser at an illumination angle, the holographic diffraction grating pattern including the spatially heterodyne hologram having spatially heterodyne fringes, wherein a difference between said illumination angle and said replay angle defines a diffraction angle .alpha. that is a function of a plane wave mathematically added to original object wave phase and amplitude data of said spatially heterodyne hologram having spatially heterodyne fringes.

Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE

DOE Contract Number:: AC05-96OR22464

Assignee:: UT-Battelle LLC (Oak Ridge, TN)

Patent Number(s):: 7,298,532

Application Number:: 10/166,859

OSTI ID:: 919901

Country of Publication:: United States

Language:: English

References (11)

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