Implementation of a binary optical full adder using a Venn diagram and optical phase conjugation.

Conventional optical pattern logic schemes can only process two input variables at a time. We propose a new optical spatial encoding scheme that is capable of simultaneously processing multiple input variables. Based on this new scheme an optical full adder was experimentally demonstrated using a picosecond optical phase-conjugation device.

Ultrafast noncollinear second-harmonic-generation-based 4 x 4 optical switching array.

A noncollinear second-harmonic-generation-based 4 x 4 switchable computational array is experimentally demonstrated. Picosecond binary scalar and vector-matrix multiplication results are presented.