US 12,352,953 B2
Multimode coupling for fiber waveguide
Michael G. Solonenko, San Diego, CA (US); and Francis G. Muennemann, Menlo Park, CA (US)
Assigned to OneLight Sensing, LLC, San Jose, CA (US)
Filed by OneLight Sensing, LLC, San Jose, CA (US)
Filed on Aug. 11, 2022, as Appl. No. 17/886,021.
Claims priority of provisional application 63/233,172, filed on Aug. 13, 2021.
Prior Publication US 2023/0049757 A1, Feb. 16, 2023
Int. Cl. G02B 26/10 (2006.01); G02B 26/08 (2006.01)
CPC G02B 26/103 (2013.01) [G02B 26/0875 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An optical system comprising:
an optical component having an exit area;
an optical detector configured to detect light incident on the optical detector; and
a gradient-index (GRIN) lens assembly positioned between the optical component and the optical detector, the GRIN lens assembly configured to couple light from the exit area of the optical component onto the optical detector, the GRIN lens assembly comprising:
a collimator GRIN lens configured to receive light from the exit area and collimate the received light; and
a focusing GRIN lens configured to focus the collimated light toward the optical detector, the collimator GRIN lens having a longer focal length than the focusing GRIN lens,
wherein a spot size of light exiting the optical component is larger than a spot size of light exiting the GRIN lens assembly.