公开(公告)号：US20240387765A1

公开(公告)日：2024-11-21

申请号：US18317736

申请日：2023-05-15

Applicant: Cisco Technology, Inc.

Inventor： Gianlorenzo MASINI ,  Long CHEN

IPC: H01L31/107 ,  H01L31/028 ,  H01L31/105 ,  H01L31/18

Abstract: Embodiments herein describe an APD architecture that includes a silicon cap layer formed on top of a germanium layer (e.g., a Ge absorption region). The silicon cap layer can form a multiplication region of the APD. Moreover, a charge layer can be formed between the absorption region and the silicon cap layer (e.g., the multiplication region).

公开(公告)号：US20240405883A1

公开(公告)日：2024-12-05

申请号：US18325933

申请日：2023-05-30

Applicant: Cisco Technology, Inc.

Inventor： Long CHEN ,  Qianfan XU ,  Jon ROTH

IPC: H04B10/61 ,  H04B10/294 ,  H04B10/50

Abstract: A receiver comprises at least two input ports. An optical signal containing n wavelengths is coupleable to one of these input ports. The receiver comprises a first demultiplexer coupled to a first input port to separate n wavelengths in the first input port onto n first multiplexer output ports, a second demultiplexer coupled to a second input port to separate the n wavelengths in the second input port onto n second multiplexer output ports, and a waveguide crossing matrix comprising an input side and an output side. The crossing matrix coupled to the n first and the n second multiplexer output ports on the input side and coupled to n shared photodetectors on the output side, one for each wavelength channel. Each of the photodetectors is coupled to one of the n first multiplexer output ports and one of the n second multiplexer output ports for the one wavelength channel.

公开(公告)号：US20240402430A1

公开(公告)日：2024-12-05

申请号：US18325909

申请日：2023-05-30

Applicant: Cisco Technology, Inc.

Inventor： Jonathan Edgar ROTH ,  Qianfan XU ,  Long CHEN

IPC: G02B6/293

Abstract: Disclosed is an adiabatic optical coupler. The adiabatic optical coupler includes a tapered input region which includes a first waveguide core and a second waveguide core. The first and second waveguide cores are separated at the tapered input region. The adiabatic optical coupler also includes a narrow coupling region extending from the tapered input region. In the narrow coupling region, the first and second waveguide cores are brought within close proximity and a third waveguide core is positioned between the first and second waveguide cores. The third waveguide core defines a longitudinal axis. The adiabatic optical coupler also includes a flared output region extending from the narrow coupling region. In the flared output region, the first, second, and third waveguide cores are separated.

公开(公告)号：US20240319440A1

公开(公告)日：2024-09-26

申请号：US18189668

申请日：2023-03-24

Applicant: Cisco Technology, Inc.

Inventor： Long CHEN

IPC: G02B6/136 ,  G02B6/12 ,  G02B6/132

CPC classification number: G02B6/136 ,  G02B6/12004 ,  G02B6/132 ,  G02B2006/1204 ,  G02B2006/12047 ,  G02B2006/12085 ,  G02B2006/12197

Abstract: A method includes providing a sacrificial wafer, contacting the sacrificial wafer to a photonic device wafer, and bonding the sacrificial wafer to the photonic device wafer. The sacrificial wafer includes a substrate and an electro-optical material strip disposed within a dielectric matrix. The photonic device wafer includes a photonic device die, and the electro-optical material strip is disposed proximate to the photonic device die. A photonic device structure includes a photonic device wafer and a sacrificial wafer. The photonic device structure includes a device wafer substrate and a photonic device die fabricated in a device wafer dielectric layer. The sacrificial wafer includes a sacrificial wafer substrate and an electro-optical material strip embedded in a sacrificial wafer dielectric matrix. The sacrificial wafer dielectric matrix is bonded to the device wafer dielectric layer, and the electro-optical material strip is disposed proximate to the photonic device die.

公开(公告)号：US20240295694A1

公开(公告)日：2024-09-05

申请号：US18177552

申请日：2023-03-02

Applicant: Cisco Technology, Inc.

Inventor： Jock T. BOVINGTON ,  Mark C. NOWELL ,  Matthew J. TRAVERSO ,  Long CHEN

IPC: G02B6/126 ,  G02B6/27

CPC classification number: G02B6/126 ,  G02B6/2766 ,  G02B6/2773

Abstract: A system, method, and photonic chip for an optical circulator are described. The system includes a first polarization splitter, a first optical circuit, and a first controller. The first polarization splitter receives, at a first port of the first polarization splitter, a first optical signal. The first optical circuit is optically coupled to the first polarization splitter. The first optical circuit includes a first plurality of phase shifters. The first optical circuit receives, at a first port of the first optical circuit, a second optical signal. The first controller adjusts the first plurality of phase shifters such that the first optical circuit outputs the first optical signal at a second port of the first optical circuit and such that the first polarization splitter outputs the second optical signal at the first port of the first polarization splitter.

公开(公告)号：US20240272385A1

公开(公告)日：2024-08-15

申请号：US18167003

申请日：2023-02-09

Applicant: Cisco Technology, Inc.

Inventor： Li CHEN ,  Long CHEN ,  Norbert SCHLEPPLE ,  Aparna R. PRASAD ,  Vipulkumar K. PATEL

IPC: G02B6/42

CPC classification number: G02B6/4251 ,  G02B6/4212 ,  G02B6/4214 ,  G02B6/4238

Abstract: Photonic packages with underfill dam structures are described. The underfill dam structures address various underfill material location issues by controlling where an underfill material flows and which areas of the photonic package underfill material is excluded from entering.