Patent ID: 8390922

Claim:
An apparatus for generating and steering electromagnetic radiation, comprising: a substrate having a surface; and a waveguide adjacent said surface of said substrate, said waveguide having at least one input port for receiving a first input light beam having a first frequency and a second input light beam having a second frequency different from said first frequency, and configured to have a plurality of adjacent waveguide segments, said plurality of adjacent waveguide segments of said waveguide configured as a phased array; said waveguide is configured so that, in response to a first input light beam provided as a first laser beam having a first frequency, and a second input light beam provided as a second laser beam having a second frequency, an output electromagnetic radiation beam is generated that includes a signal at a frequency corresponding to a difference between said first frequency of said first input light beam and said second frequency of said second input light beam, said output electromagnetic radiation beam configured to be steered by said phased array.