Patent ID: 6704480
Filing Date: 2004-03-09
Classification: G02B

Abstract:
A method for making a demultiplexer, comprising the steps of:forming a first waveguide layer in overlying relation to a first substrate; forming a barrier layer in overlying relation to said first waveguide layer; forming a second waveguide layer in overlying relation to said barrier layer; processing a first surface of said second waveguide layer which is opposite said barrier layer to at least complete a definition of one of first and second demultiplexing subassemblies, wherein said first demultiplexing subassembly comprises a grating assembly, and wherein said second demultiplexing subassembly comprises a photodetector assembly, wherein said first substrate, said first waveguide layer, said barrier layer, and said second waveguide layer define a stack; mounting said stack on a second substrate such that said first surface of said second waveguide layer projects toward said second substrate; removing said first substrate; and processing a surface of said first waveguide layer that is exposed by said removing said first substrate step to at least complete a definition of the other of said first and second demultiplexing subassemblies.