US 12,422,258 B2
Ring waveguide based integrated photonics optical gyroscope with balanced detection scheme
Mario Paniccia, Santa Clara, CA (US)
Assigned to Anello Photonics, Inc., Santa Clara, CA (US)
Filed by Anello Photonics, Inc., Santa Clara, CA (US)
Filed on Apr. 10, 2023, as Appl. No. 18/298,262.
Application 18/298,262 is a continuation of application No. 17/493,707, filed on Oct. 4, 2021, granted, now 11,624,615.
Claims priority of provisional application 63/087,614, filed on Oct. 5, 2020.
Prior Publication US 2023/0332894 A1, Oct. 19, 2023
Int. Cl. G01C 19/72 (2006.01); G01C 19/66 (2006.01); G02B 6/122 (2006.01)
CPC G01C 19/727 (2013.01) [G01C 19/66 (2013.01); G02B 6/122 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An optical gyroscope fabricated as an integrated photonics chip, comprising:
a first portion of the integrated photonics chip comprising waveguide-based optical components, wherein a narrow linewidth laser light is launched from the first portion of the integrated photonics chip to a second portion of the integrated photonics chip; and
a rotation sensing element in the second portion of the integrated photonics chip that receives the narrow linewidth laser light from the first portion, wherein the narrow linewidth of the laser light dictates a quality factor of the rotation sensing element,
wherein the first portion and the second portion of the integrated photonics chip are packaged together on a common platform, and the rotation sensing element produces an output optical signal that is divided equally to propagate into two symmetrical waveguide branches leading to two respective photodetectors to achieve balanced power detection.