Optical neural network with quantum well devices.

An optical implementation of a second-order, translation-invariant neural network algorithm is described. The active devices are two arrays of integrated asymmetric Fabry-Perot modulators. The device and the array characteristics are given. The arrays are used, with passive optics, to provide optical input, matrix multiplication, and weighted interconnects in a cascaded optical system. The detailed parameters of the system are discussed, and the operation is assessed in terms of noise tolerance. Translation invariance is confirmed. Finally, the relative merits of the devices and algorithm are considered.