Multi-layered substrates for waveguide displays

A waveguide display comprising:

• a light source configured to emit light of a first band;
• an output waveguide including an input area, a plurality of layers of including a first substrate and a second substrate, one or more partially reflective layers, and an output area, the output waveguide coupled to receive the light of the first band at the input area, expand the received light to form image light and output the image light using the output area, each of the one or more partially reflective layers are located between respective layers of the plurality of layers, wherein the one or more partially reflective layers are formed by bonding the first substrate coated with a first film of a threshold value of thickness and the second substrate coated with a second film of a threshold value of thickness, the first substrate having a different thickness than the second substrate;
• and
• a controller configured to generate scanning instructions and provide the scanning instructions to the light source,
• wherein a pupil replication density of the image light is based in part on a number of the one or more partially reflective layers and respective locations of the one or more partially reflective layers in the output waveguide.