公开(公告)号：US20240045146A1

公开(公告)日：2024-02-08

申请号：US18357181

申请日：2023-07-24

Applicant: Apple Inc.

Inventor： Nurul Taimur Islam ,  Helen H. Liang ,  Malcolm J. Northcott ,  Ariel Lipson

IPC: G02B6/34 ,  G02B6/27 ,  G02B6/28

CPC classification number: G02B6/34 ,  G02B6/276 ,  G02B6/2773 ,  G02B6/2804

Abstract: An optical coupling device includes a first waveguide layer, including a first semiconductor material, which is disposed over a dielectric substrate layer. A dielectric intermediate layer overlies the first waveguide layer. A second waveguide layer, which includes a different, second semiconductor material, is disposed over the dielectric intermediate layer and is patterned to define a waveguide. A first grating in the second waveguide layer diffracts light of a given wavelength from the waveguide into a specified diffraction order at a given coupling angle, whereby a first fraction of the light propagates out of the device while a second fraction of the light is diffracted into the intermediate dielectric layer in a conjugate diffraction order. A second grating in the first waveguide layer diffracts the second fraction of the light into a second diffraction order, propagating out of the device at the given coupling angle.

公开(公告)号：US20230366986A1

公开(公告)日：2023-11-16

申请号：US17742419

申请日：2022-05-12

Applicant: APPLE INC.

Inventor： Nurul Taimur Islam ,  Malcolm J. Northcott ,  Christopher M. Rogers ,  Helen H. Liang ,  Ehsan Shah-Hosseini ,  Jack E. Graves ,  Ariel Lipson ,  Daniel Kravitz

IPC: G01S7/481 ,  G01S17/42 ,  G01S17/89 ,  G02B26/10

CPC classification number: G01S7/4817 ,  G01S17/42 ,  G01S17/89 ,  G01S7/4815 ,  G02B26/105 ,  G02B26/108

Abstract: An optical sensing device includes a planar substrate and an array of optical transceivers disposed on the planar substrate. Each optical transceiver includes a photodetector, at least one turning mirror having a reflective surface disposed diagonally relative to the substrate, and multiple waveguides disposed parallel to the substrate. The waveguides include a transmit waveguide, which is coupled to convey outgoing light from a coherent light source to the at least one turning mirror for output from the optical transceiver, and a receive waveguide, which is coupled to receive incoming light reflected by the at least one turning mirror and to convey the incoming light to the photodetector.