All-optical multifunctional logic gates for image information using Photorefractive two-wave mixing

作者：Ishikawa Daisuke^*; Okamoto Atsushi; Honma Satoshi; Ito Terumasa; Shimayabu Kohei; Sat Kunihiro

来源：Optical Review, 2007, 14(4): 246-251.

DOI：10.1007/s10043-007-0246-3

• optical image processing
• alt-optical logic gate
• photorefractive effect
• two-wave mixing
• finite-difference beam propagation method

In this paper, we propose all-optical multifunctional logic gates for image information using photorefractive (PR) two-wave mixing. The optical setup is simply configured compared with the other all-optical logic gates for image information. The XOR-, OR-, and AND-operation are all-optically performed in the same optical setup through the transitional response of the PR medium. One can switch these logic operations simply by means of the on-off control of the signal and the pump beam illumination. We analyze the spatial distribution of beam intensity in these logic gates using a finite-difference beam propagation method (FD-BPM) and the crosstalk between adjoining pixels is examined from the result. We also experimentally verify that the XOR-, OR-, and AND-gates are realized in the same optical setup.

• 出版日期2007-8