Browsing by Author "SUN, CC"

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ANISOTROPIC STRONG VOLUME HOLOGRAM IN BATIO3
(1995-09-15)
SUN, CC
;
CHANG, MW
;
HSU, KY
;
光電工程學系
;
Department of Photonics
A photorefractive strong volume hologram by using anisotropic diffraction in a normal-cut BaTiO3 is proposed and demonstrated. Experimental measurements fit the theoretical calculations well by using Kogelnik's formula with unclamped E-O coefficients. The maximum refractive index perturbation in the experiment is larger than 2.7 X 10(-4). In addition, we have observed that the output of the diffracted light are concentric circles. This pattern is shown as a good guide of the estimation of how large the refractive index perturbation is. The Bragg condition of the anisotropic strong volume hologram is so strict that an image-carried hologram cannot be directly read out. We proposed an address image method by erasure for solving this problem. Through this method, this anisotropic strong volume hologram has some potential for optical image storage.
CONTRAST-REVERSIBLE PHOTOREFRACTIVE INCOHERENT-TO-COHERENT OPTICAL CONVERTER BY USING AN ANISOTROPIC STRONG VOLUME HOLOGRAM
(1993-04-15)
SUN, CC
;
CHANG, MW
;
HSU, KY
;
光電工程學系
;
Department of Photonics
An anisotropic strong volume hologram with a large coupling parameter is demonstrated in a normal-cut BaTiO3 crystal. We use this hologram to fabricate an incoherent-to-coherent optical converter that has a contrast-reversible output.
MATRIX MATRIX MULTIPLICATION BY USING ANISOTROPIC SELF-DIFFRACTION IN BATIO3
(1994-07-10)
SUN, CC
;
CHANG, MW
;
HSU, KY
;
光電工程學系
;
Department of Photonics
We propose a matrix-matrix multiplication by using anisotropic self-diffraction in BaTiO3. The input matrices are carried by the two incident beams with special Bragg-matched incident angles. The output matrices are produced by anisotropic self-diffraction with the polarization orthogonal to those of the incident matrices. By thresholding the output this architecture is particularly suitable for the applications of optical interconnects and an optical switch.
OPTIMAL INCIDENT CONDITIONS FOR A CAT-TYPE SELF-PUMPED PHASE-CONJUGATE MIRROR
(1992-09-20)
SUN, CC
;
YEH, S
;
CHANG, MW
;
HSU, KY
;
光電工程學系
We present a simplified method, based on experimental observations, for predicting the best incident conditions for obtaining the highest reflectivity of a Cat-type self-pumped phase conjugator with given crystal dimensions.