Wide angular aperture holograms in photorefractive crystals by the use of orthogonally polarized write and read beams.

We demonstrate a method of simultaneous holographic recording and readout in photorefractive crystals that provides high write-read beam isolation and wide angular bandwidth. The method uses orthogonally polarized read and write beams and parallel tangent diffraction geometry near the equal curvature condition to provide spatially separable, orthogonally polarized diffracted output beams with high isolation and wide Bragg-matched angular bandwidth. The available angular bandwidth of this read-write technique is analyzed, simulated, and experimentally investigated. The measured angular bandwidth internal to the crystal is approximately 18° × 6° for our 45°-cut BaTiO(3) crystal, yet the entire hologram still demonstrates high Bragg selectivity. In contrast, traditional nonparallel-tangent geometries yield angular apertures of the order of 1° × 4°.

[1]  John H. Hong,et al.  Photorefractive Crystals As Adaptive Elements In Acoustooptic Filters , 1987, Other Conferences.

[2]  R M Montgomery,et al.  Photorefractive adaptive filter structure with 40-dB interference rejection. , 1991, Applied optics.

[3]  D. Psaltis,et al.  Photorefractive incoherent-to-coherent optical converter. , 1983, Applied optics.

[4]  V. Aristov,et al.  PROPERTIES OF THREE-DIMENSIONAL HOLOGRAMS , 1971 .

[5]  A Korpel,et al.  A television display using acoustic deflection and modulation of coherent light. , 1966, Applied optics.

[6]  Dana Z. Anderson,et al.  Optical novelty filters , 1989 .

[7]  M. S. Soskin,et al.  Dynamic holography and optical image processing , 1979 .

[8]  Charles L. Woods,et al.  Photorefractive frequency converter and phase-sensitive detector , 1993 .

[9]  Jack Feinberg,et al.  Photorefractive effects and light‐induced charge migration in barium titanate , 1980 .

[10]  J Khoury,et al.  Photorefractive optical lock-in detector. , 1991, Optics letters.

[11]  P. P. Ewald.  Crystal Optics for Visible Light and X Rays , 1965 .

[12]  Jack Feinberg.  Imaging through a distorting medium with and without phase conjugation , 1983 .

[13]  G. Coquin,et al.  Wide-Band Acoustooptic Deflectors Using Acoustic Beam Steering , 1970, IEEE Transactions on Sonics and Ultrasonics.

[14]  I. C. Chang,et al.  Noncollinear acousto‐optic filter with large angular aperture , 1974 .

[15]  P. Yeh.  Two-wave mixing in nonlinear media , 1989 .

[16]  D Psaltis,et al.  Bias-free time-integrating optical correlator using a photorefractive crystal. , 1985, Applied optics.

[17]  Amnon Yariv,et al.  Real‐time phase conjugate window for one‐way optical field imaging through a distortion , 1982 .

[19]  Y. Fainman,et al.  Optimal coherent image amplification by two-wave coupling in photorefractive BaTiO3 , 1986 .

[20]  K Wagner,et al.  Multilayer optical learning networks. , 1987, Applied optics.

[21]  P. Yeh,et al.  Image-degradation mechanisms in photorefractive amplifiers , 1989 .

[22]  K Wagner,et al.  Photorefractive processing for large adaptive phased arrays. , 1996, Applied optics.

[23]  D. S. Oliver,et al.  IMAGE STORAGE AND OPTICAL READOUT IN A ZnS DEVICE , 1970 .

[24]  Mark V. Zolotarev,et al.  Optical neurocomputers based on photorefractive crystals , 1992 .

[25]  L. Pichon,et al.  Dynamic joint-fourier-transform correlator by Bragg diffraction in photorefractive Bi12SiO20 crystals , 1981 .

[26]  V. B. Markov,et al.  holographic storage in electrooptic crystals. II. beam coupling—light amplification , 1978 .

[27]  Kelvin H. Wagner,et al.  Adaptive phased-array radar processing using photorefractive crystals , 1990, Photonics West - Lasers and Applications in Science and Engineering.

[28]  Amnon Yariv,et al.  Real‐time image processing via four‐wave mixing in a photorefractive medium , 1980 .

[29]  P. Yeh,et al.  Parallel image subtraction using a phase-conjugate Michelson interferometer. , 1986, Optics letters.

[30]  K. Kos,et al.  Phase-conjugate shear interferometer with multiple wavelengths , 1994 .

[31]  Y Owechko,et al.  Cascaded-grating holography for artificial neural networks. , 1993, Applied optics.

[32]  Parallel subtraction of Fourier power spectrum using holographic interferometry. , 1992, Optics letters.

[33]  Kelvin H. Wagner,et al.  Beam-steering and jammer-nulling photorefractive phased-array radar processor , 1994 .

[34]  D.A. Pinnow,et al.  Acousto-Optic Light Deflection: Design Considerations for First Order Beam Steering Transducers , 1971, IEEE Transactions on Sonics and Ultrasonics.

[35]  J F Rhodes.  Adaptive filter with a time-domain implementation using correlation cancellation loops. , 1983, Applied optics.