公开(公告)号：US20210157033A1

公开(公告)日：2021-05-27

申请号：US16696957

申请日：2019-11-26

Applicant: Cisco Technology, Inc.

Inventor： Xunyuan ZHANG ,  Shiyi CHEN ,  Tao LING ,  Prakash B. GOTHOSKAR

IPC: G02B1/113 ,  G02B6/136 ,  G01M11/00

Abstract: Embodiments herein describe a photonic platform where an AR coating is disposed between an optical grating and a semiconductor substrate. In one embodiment, the optical grating is disposed within an insulative layer. A first side of the insulative layer provides an optical interface where an external optical source can transmit an optical signal into, or a receive an optical signal from, the grating. A second, opposite side of the insulative layer contacts the AR coating. When the external optical source transmits light through the first side of the insulative layer, some of the light passes through the grating and reaches the AR coating. The AR coating prevents this light from being reflected back to the grating by the semiconductor layer which can cause interference that varies the coupling efficiency of the grating.

公开(公告)号：US20250028114A1

公开(公告)日：2025-01-23

申请号：US18353760

申请日：2023-07-17

Applicant: Cisco Technology, Inc.

Inventor： Xunyuan ZHANG ,  Weizhuo LI ,  Steven H. HOVEY ,  Michael P. MACK ,  Steffen GLOECKNER

IPC: G02B6/12

Abstract: Embodiments herein describe optical devices that include focusing elements in or on a substrate on which a laser source is disposed. That is, the focusing element can be arranged on a same surface of the substrate as the laser source. In one embodiment, the laser source emits an optical signal that is parallel with the same surface of the substrate. A turning mirror can be used to direct the optical signal in a direction perpendicular to the surface so that the optical signal is incident on the focusing element.

公开(公告)号：US20230243718A1

公开(公告)日：2023-08-03

申请号：US18297412

申请日：2023-04-07

Applicant: Cisco Technology, Inc.

Inventor： Xunyuan ZHANG ,  Ravi S. TUMMIDI ,  Tony P. POLOUS ,  Mark A. WEBSTER

IPC: G01M11/00 ,  G02B6/12

CPC classification number: G01M11/30 ,  G02B6/12007 ,  G02B2006/12164 ,  G02B2006/12061 ,  G02B2006/12145

Abstract: Electrical test of optical components via metal-insulator-semiconductor capacitor structures is provided via a plurality of optical devices including a first material embedded in a second material, wherein each optical device is associated with a different thickness range of a plurality of thickness ranges for the first material; a first capacitance measurement point including the first material embedded in the second material; and a second capacitance measurement point including a region from which the first material has been replaced with the second material.

公开(公告)号：US20230204987A1

公开(公告)日：2023-06-29

申请号：US18177497

申请日：2023-03-02

Applicant: Cisco Technology, Inc.

Inventor： Xunyuan ZHANG ,  Vipulkumar K. PATEL ,  Prakash B. GOTHOSKAR ,  Ming Gai Stanley LO

IPC: G02F1/025

CPC classification number: G02F1/025 ,  G02F2202/104 ,  G02F2202/105

Abstract: Embodiments provide for an optical modulator, comprising: a lower guide, comprising: a lower hub, made of monocrystalline silicon; and a lower ridge, made of monocrystalline silicon that extends in a first direction from the lower hub; an upper guide, including: an upper hub; and an upper ridge, made of monocrystalline silicon that extends in a second direction, opposite of the first direction, from the upper hub and is aligned with the lower ridge; and a gate oxide layer separating the lower ridge from the upper ridge and defining a waveguide region with the lower guide and the upper guide.

公开(公告)号：US20230074516A1

公开(公告)日：2023-03-09

申请号：US17447153

申请日：2021-09-08

Applicant: Cisco Technology, Inc.

Inventor： Tao LING ,  Shiyi CHEN ,  Xunyuan ZHANG ,  Prakash B. GOTHOSKAR

IPC: G02B6/122 ,  F21V8/00

Abstract: Embodiments presented in this disclosure generally relate to an optical device having a grating coupler for redirection of optical signals. One embodiment includes a grating coupler. The grating coupler generally includes a waveguide layer, a thickness of a waveguide layer portion of the waveguide layer being tapered, the thickness defining a direction, and a grating layer disposed above the waveguide layer and perpendicular to the direction where at least a grating layer portion of the grating layer overlaps the waveguide layer portion of the waveguide layer along the direction. Some embodiments are directed to grating coupler implemented with material layers above and a reflector layer below a grating layer, facilitating redirection and confinement of light that improves coupling loss and bandwidth. The material layers and reflector layer above and below the grating layer may be implemented with or without the waveguide layer being tapered.