US 12,332,057 B2
Chip-integrated optical rotation rate sensor
Patrick Tritschler, Engen (DE); and Torsten Ohms, Vaihingen/Enz-Aurich (DE)
Assigned to ROBERT BOSCH GMBH, Stuttgart (DE)
Filed by Robert Bosch GmbH, Stuttgart (DE)
Filed on Jun. 20, 2023, as Appl. No. 18/338,173.
Claims priority of application No. 10 2022 206 454.2 (DE), filed on Jun. 27, 2022.
Prior Publication US 2023/0417551 A1, Dec. 28, 2023
Int. Cl. G01C 19/66 (2006.01)
CPC G01C 19/661 (2013.01) 12 Claims
OG exemplary drawing
 
1. An optical rotation rate sensor, comprising:
a laser light source configured to generate weak light pulses, optically connected to a photonic waveguide, optically connected to a first interference coupler that includes a first input and two first outputs, optically connected to a second interference coupler that includes two second inputs and two second outputs, optically connected to at least one first sensor waveguide for showing the Sagnac effect, optically connected to a third interference coupler that includes two third inputs and two third outputs, optically connected to two photodetectors;
wherein the photonic waveguide, the first interference coupler, the second interference coupler, the third interference coupler and the sensor waveguide are integrated on a shared substrate.