公开(公告)号：US20250030497A1

公开(公告)日：2025-01-23

申请号：US18353781

申请日：2023-07-17

Applicant: Cisco Technology, Inc.

Inventor： Vipulkumar K. PATEL ,  Romesh Kumar NANDWANA ,  Norbert SCHLEPPLE ,  Eng Wen ONG ,  Prakash B. GOTHOSKAR

IPC: H04J14/06 ,  H04B10/67

Abstract: The present disclosure describes an optical system and method of operating the optical system. The optical system includes a substrate and first and second photonic integrated circuits. The first photonic integrated circuit is positioned on the substrate. The second photonic integrated circuit is positioned on the first photonic integrated circuit. The second photonic integrated circuit receives a first optical signal that includes a first mode and a second mode. The second photonic integrated circuit includes a polarization splitter rotator, a first demultiplexer, and a second demultiplexer. The polarization splitter rotator separates the first optical signal into a second optical with the first mode and a third optical signal with the first mode. The first and second demultiplexers separate the second and third optical signals into first and second pluralities of optical signals. The first and second pluralities of optical signals couple into the first photonic integrated circuit.

公开(公告)号：US20230122662A1

公开(公告)日：2023-04-20

申请号：US17451265

申请日：2021-10-18

Applicant: Cisco Technology, Inc.

Inventor： Eng Wen ONG ,  Mark A. WEBSTER

IPC: G02B5/18 ,  H01S5/0225

Abstract: A grating coupler with a wafer bonded configuration includes: a substrate; an oxide layer disposed on the substrate; a silicon nitride layer disposed above the oxide layer; a first silicon layer disposed above the silicon nitride layer; a second silicon layer disposed above the first silicon layer; and a bi-layer grating disposed above the silicon nitride layer. The bi-layer grating includes (i) a first etched layer of the first silicon layer and (ii) a second etched layer of the second silicon layer.