A scheme of an optical switch using a matrix of reprogrammable holograms is discussed. The light from each input channel is deflected to an output channel with a separate microhologram. The microholograms are recorded and overrecorded with two acousto-optical deflectors on a bacteriorhodopsin photo medium. The experiments have been carried out on a prototype with 20 X 20 channels. As shown, the capacity of such a switch can be increased up to 104 X 104.
Viktor K. Salakhutdinov,
Andrei L. Mikaelian,
"Holographic interconnects using bacteriorhodopsin material", Proc. SPIE 1807, Photonic Switching, (28 June 1993); doi: 10.1117/12.147946; https://doi.org/10.1117/12.147946