US 11,656,080 B1
Silicon nitride waveguide based integrated photonics front-end chip for optical gyroscope
Mario Paniccia, Santa Clara, CA (US); and Mike Horton, Santa Clara, CA (US)
Assigned to Anello Photonics, Inc., Santa Clara, CA (US)
Filed by Anello Photonics, Inc., Santa Clara, CA (US)
Filed on Aug. 23, 2022, as Appl. No. 17/894,108.
Int. Cl. G01C 19/72 (2006.01)
CPC G01C 19/721 (2013.01) 28 Claims
OG exemplary drawing
 
1. An optical gyroscope comprising:
a front-end chip fabricated on a silicon nitride (SiN) waveguide platform, wherein the front-end chip launches light into and receives light from a rotation sensing element, and wherein the front-end chip comprises SiN waveguide-based optical components that guide the light towards and from the rotation sensing element;
a fiber-optic coil coupled to the front-end chip, wherein the fiber-optic coil acts as the rotation sensing element; and
at least one external phase shifter coupled to the front-end chip, wherein the at least one external phase shifter is physically outside of the SiN waveguide platform.