| Abstract: | An optical NOR gate is formed from two pair of optical waveguide devices
on a substrate, with each pair of the optical waveguide devices
consisting of an electroabsorption modulator electrically connected in
series with a waveguide photodetector. The optical NOR gate utilizes two
digital optical inputs and a continuous light input to provide a NOR
function digital optical output. The optical NOR gate can be formed from
III-V compound semiconductor layers which are epitaxially deposited on a
III-V compound semiconductor substrate, and operates at a wavelength in
the range of 0.8-2.0 .mu.m. |