Patent ID: 6621959
Filing Date: 2003-09-16
Classification: G02B

Abstract:
A beam splitter/beam coupler with a planar waveguide, comprising:a planar waveguide having a substantially flat first end and a contoured second end and having three optical material layers M1, M2, and M3 having refractive indices n1, n2, and n3, respectively, in which n2>n1 and n2>n3 so that light beams entering layer M2 are totally refracted and transmitted therein; and a Fourier transform diffraction element formed on the first end of said planar waveguide for diffracting an incident beam entering one of the first or the second end of the planar waveguide into a plurality of output beams, and coupling a plurality of incident beams entering one of the first or the second end of the planar waveguide into one output beam.