公开(公告)号：US20240219632A1

公开(公告)日：2024-07-04

申请号：US18091535

申请日：2022-12-30

Applicant: Intel Corporation

Inventor： Umesh Prasad ,  Suddhasattwa Nad ,  Benjamin T. Duong ,  Yi Yang

IPC: G02B6/122 ,  G02B1/02 ,  G02B3/00

CPC classification number: G02B6/122 ,  G02B1/02 ,  G02B3/0087 ,  G02B2006/12061

Abstract: Technologies for integrated graded index (GRIN) lenses for photonic circuits is disclosed. In one illustrative embodiment, a glass substrate has a cavity in which a GRIN lens is disposed. In other embodiments, the GRIN lens may be on a surface of the glass substrate. The GRIN lens focuses and collimates light to a free-space beam from a waveguide defined in the glass substrate. Another component such as a photonic integrated circuit (PIC) die may also have a GRIN lens and focus the free-space beam into a waveguide in the PIC die. The use of GRIN lenses allows for passive coupling to waveguides without further active alignment that minimizes signal transmission losses.