公开(公告)号：US20240243214A1

公开(公告)日：2024-07-18

申请号：US18156301

申请日：2023-01-18

Applicant: Cisco Technology, Inc.

Inventor： Rajat SHARMA ,  Attila MEKIS ,  Gianlorenzo MASINI

IPC: H01L31/107 ,  H01L31/0232

CPC classification number: H01L31/1075 ,  H01L31/02325 ,  H01L31/02327

Abstract: A photodetector and method of making a photodetector are disclosed. An apparatus includes a semiconductor disk, a first doped region, and a first absorption region. The first doped region is disposed within the semiconductor disk such that the first doped region extends across a center of the semiconductor disk. The first doped region has a first doping type. The first absorption region is disposed on the first doped region such that a portion of the first doped region is positioned between the center of the semiconductor disk and the first absorption region along a radius of the semiconductor disk. The first absorption region includes a second doped region with a second doping type different from the first doping type. The first absorption region is arranged to absorb an optical signal as the optical signal travels along an inner circumference of the semiconductor disk.

公开(公告)号：US20240356656A1

公开(公告)日：2024-10-24

申请号：US18302360

申请日：2023-04-18

Applicant: Cisco Technology, Inc.

Inventor： Rajat SHARMA ,  Fatemeh REZAEIFAR BAYAT ,  Attila MEKIS ,  Gianlorenzo MASINI

IPC: H04B10/67 ,  G02B6/12

CPC classification number: H04B10/67 ,  G02B6/12016 ,  G02B2006/12035 ,  G02B2006/12159

Abstract: The present disclosure describes photodetectors with multiple inputs and methods of operating photodetectors with multiple inputs. An apparatus includes a substrate, an optical absorber, and an optical device. The optical absorber is positioned on the substrate. The optical absorber includes a first portion and a second portion coupled to the first portion along a line. The optical device produces a first optical signal and a second optical signal based on a received optical signal and directs the first optical signal through the first portion of the optical absorber in a direction substantially parallel to the line. The optical device also directs the second optical signal through the second portion of the optical absorber in the direction substantially parallel to the line.

公开(公告)号：US20240353729A1

公开(公告)日：2024-10-24

申请号：US18302491

申请日：2023-04-18

Applicant: Cisco Technology, Inc.

Inventor： Rajat SHARMA ,  Donald J. ADAMS ,  Attila MEKIS ,  Gianlorenzo MASINI

IPC: G02F1/21 ,  G01S7/481

CPC classification number: G02F1/217 ,  G01S7/4816

Abstract: The present disclosure describes photodetectors with multiple inputs and methods of operating photodetectors with multiple inputs. An apparatus includes a substrate, an optical absorber, an optical device, and a tuner. The optical absorber is positioned on the substrate. The optical device produces a first optical signal and a second optical signal from an optical signal received at a first port of the optical device and directs the first optical signal and the second optical signal to the optical absorber. The tuner adjusts a first phase of the first optical signal and a second phase of the second optical signal such that a reflection of the first optical signal from the optical absorber destructively interferes with a reflection of the second optical signal from the optical absorber at the first port.