Abstract

Multiple-valued logic offers many times the logic power and packing desity of binary logic, thus reducing the number of necessary logic gates.¹ Recently optical multip1e-va1ued logic has been studied extensively using shadow casting method.² In this paper we describe a new configuration of optical multiple-valued logic gates using composite bistable laser diode or light emitting diode circuits (BILD or BILED). To our knowledge, this is the first time that optical multip1e-va1ued logic have been obtained using optical bistable device. We have demonstrated four Post logic functions: Complement, Max(x,y), Min(x.y), and Suc(x) using composite BILED circuits. We only take Complement and Max(x,y) for example here.

© 1989 Optical Society of America