US 11,988,869 B2
Photonic buried interposer
Yangyang Liu, Pasadena, CA (US)
Assigned to Rockley Photonics Limited, Altrincham (GB)
Appl. No. 17/296,211
Filed by ROCKLEY PHOTONICS LIMITED, Altrincham (GB)
PCT Filed Mar. 31, 2020, PCT No. PCT/IB2020/000244
§ 371(c)(1), (2) Date May 21, 2021,
PCT Pub. No. WO2020/201829, PCT Pub. Date Oct. 8, 2020.
Claims priority of provisional application 62/827,660, filed on Apr. 1, 2019.
Prior Publication US 2022/0011509 A1, Jan. 13, 2022
Int. Cl. G02B 6/122 (2006.01); G02B 6/13 (2006.01); G02B 6/12 (2006.01)
CPC G02B 6/1228 (2013.01) [G02B 6/131 (2013.01); G02B 2006/12061 (2013.01); G02B 2006/12097 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A photonic buried interposer for converting light between a first optical mode of a first optical component and a second optical mode of a second optical component, the second optical component being larger than the first optical component;
the photonic buried interposer comprising a bi-layer taper, the bi-layer taper comprising:
a top device layer comprising an upper tapered waveguide; and
a bottom device layer comprising a lower tapered waveguide;
wherein the upper tapered waveguide extends from a first end for coupling to the first optical component to a second end for coupling to the second optical component; and the lower tapered waveguide starts from an intermediate location between the first and second ends and extends from the intermediate location to the second end, and
wherein the upper tapered waveguide is a rib waveguide having a slab portion and a tapered ridge extending from the slab portion, the lower tapered waveguide being directly on an opposite side of the slab portion from the ridge.