Abstract

A unique method to achieve high fan-out optical interconnections based on the correlation matrix-tensor multiplier (CMTM) algorithm has recently been demonstrated.¹ We present a new packaged version of this optical system that is amenable to integration with opto-electronics. In this system, a random phase-encoded input array is optically correlated with a recorded control pattern that stores the pre-determined interconnections by utilizing photorefractive four-wave mixing. A random phase plate, a LiNbO3 crystal, and two computer-generated holograms (CGHs) have been integrated on one surface of a glass substrate of dimensions 80 × 80 × 44 mm. The CGHs (12 mm aperture) are designed by Code-V and fabricated by using direct-write e-beam lithography. The correlated output is observed by a CCD camera. Optical interconnection between 5×5 arrays is demonstrated. Reconfiguration between the pre-stored interconnections is possible by using wavelength multiplexing to store different control patterns in the photorefractive crystal. Details of the system design and experimental results are described.

© 1992 Optical Society of America