Shallow-profile optical elements for photonics receivers
AssigneeIntel Corporation
InventorsAlexander Krichevsky, John M. Heck
Life of this patent
Estimating the term…
Abstract
An optical system can include a optical receiver comprising an optical waveguide, an optical lid adjacent the waveguide, and a reflective surface proximate an output of the optical waveguide to direct light from the waveguide towards an output of the optical lid. The optical system can also include a photodetector (PD) die comprising a substrate, a concave mirror, and a photodetector. The concave mirror is formed on a first side of the substrate and the photodetector is disposed on a second side of the substrate, the first side opposite the second side, wherein the photodetector is disposed on the second side of the PD die offset from the optical axis of the optical element.
Claims21
An apparatus comprising:
- a photodetector (PD) die comprising:
- an optical element formed on a first side of the PD die;
- and
- a photodetector disposed on a second side of the PD die, the first side opposite the second side, wherein the photodetector is disposed on the second side of the PD die offset from an optical axis of the optical element,
- wherein the optical element comprises a sag and a clear aperture, wherein a ratio of sag to clear aperture is less than 1:10.
A system comprising:
- a optical receiver comprising:
- an optical waveguide,
- an optical lid adjacent the waveguide, and
- a reflective surface proximate an output of the optical waveguide to direct light from the waveguide towards an output of the optical lid;
- and
- a photodetector (PD) die comprising:
- a substrate,
- a concave mirror, and
- a photodetector,
- wherein the concave mirror is formed on a first side of the substrate and the photodetector is disposed on a second side of the substrate, the first side opposite the second side, wherein the photodetector is disposed on the second side of the PD die offset from the optical axis of the concave mirror,
- wherein the concave mirror comprises a sag of less than 4 microns.
A photonic device comprising:
- a fiber optic receiver;
- and
- a photodetector die, the photodetector die comprising:
- a shallow optical element comprising low sag relative to a radius of curvature of the shallow optical element, wherein the shallow optical element has a sag less than 10 micrometers, and
- a photodetector to receive light from the shallow optical element, the photodetector offset from an optical axis of the shallow optical element;
- wherein the shallow optical element is to direct light from the fiber optic receiver to the photodetector.
Dependencies are inferred from the claim text.