Patent ID: 11906351
Assignee: NATIONAL TECHNOLOGY & ENGINEERING SOLUTIONS OF SANDIA, LLC
Field: Optics (Instruments)
Classification: CPC G  H | IPC G

Claim 10:
11. The photonic integrated circuit of claim 1,
further comprising:
a second intermetal dielectric level on the upper metal layer on a side opposite the intermetal dielectric layer;
a third metal layer on the second intermetal dielectric level on a side opposite the upper metal layer; and
one or more second level metal vias in the second intermetal dielectric level,

wherein the one or more second level metal vias includes one or more second level encircling optical baffles, each of the one or more second level encircling optical baffles at least partially encircling a corresponding one of the one or more optical gratings, each of the one or more second level encircling optical baffles adapted to block stray light.