WAVELENGTH-MULTIPLEXED RECONFIGURABLE INTERCONNECT USING A VOLUME HOLOGRAPHIC LENS ARRAY

Wavelength-multiplexed holograms have been used to store log(N) stages of an N-node butterfly interconnect. We recorded and reconstructed the holograms, using LiNbO3 over a range of 790 to 800 nm. The wavelength separation can be as little as 0.6 run between holograms. We implemented the interconnect by recording a 4 x 4 array of elements that contained five superimposed lenses each. These lenses formed a semi-space-variant optical interconnect with a space-bandwidth product larger than 2 x 10(3) for each 2 mm x 2 mm lens.