Waveguide Array Wavelength Router Design to Improve Insertion Loss Uniformity

Abstract

We propose a wavelength router design to improve insertion loss uniformity. Branched waveguides are placed at junctions between the waveguide array and a planar waveguide. The diffracted light injected into planar waveguides is forwarded in different directions. At the image plane of the planar waveguide, a flat top envelope is attained to ensure loss uniformity among output ports.