公开(公告)号：US11686648B2

公开(公告)日：2023-06-27

申请号：US17443280

申请日：2021-07-23

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 ,  G02B2006/12061 ,  G02B2006/12145 ,  G02B2006/12164

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：US10935726B1

公开(公告)日：2021-03-02

申请号：US16593821

申请日：2019-10-04

Applicant: Cisco Technology, Inc.

Inventor： Yi Ho Lee ,  Tao Ling ,  Ravi S. Tummidi ,  Mark A. Webster

IPC: G02B6/28 ,  H04B10/25 ,  H04J14/02

Abstract: An optical device is disclosed, including a phase delay, a first adiabatic coupler adapted to receive an input signal and adapted to be optically coupled to an input of the phase delay, and a second adiabatic coupler adapted to be optically coupled to an output of the phase delay. The second adiabatic coupler includes a first waveguide including a first portion optically coupled to the first output and including a first width, and a second waveguide including a second portion optically coupled to the second output and comprising a second width that is approximately equal to the first width.

公开(公告)号：US10852472B1

公开(公告)日：2020-12-01

申请号：US16445083

申请日：2019-06-18

Applicant: Cisco Technology, Inc.

Inventor： Tao Ling ,  Yi Ho Lee ,  Ravi S. Tummidi ,  Mark A. Webster

IPC: G02B6/02 ,  G02B6/293 ,  H04J14/02 ,  G02B6/12 ,  H04B10/60 ,  H04B10/66 ,  H04B10/50 ,  H04B10/67 ,  H04J14/00 ,  H04B10/40

Abstract: Aspects described herein include an optical apparatus comprising at least a first Bragg grating of a first stage. The first Bragg grating is configured to transmit a first two wavelengths and to reflect a second two wavelengths of a received optical signal. The optical apparatus further comprises a second Bragg grating of a second stage. The second Bragg grating is configured to transmit one of the first two wavelengths and to reflect the other of the first two wavelengths. The optical apparatus further comprises a third Bragg grating of the second stage. The third Bragg grating is configured to transmit one of the second two wavelengths and to reflect the other of the second two wavelengths.

公开(公告)号：US12092863B2

公开(公告)日：2024-09-17

申请号：US17451247

申请日：2021-10-18

Applicant: Cisco Technology, Inc.

Inventor： Yi Ho Lee ,  Tao Ling ,  Ravi S. Tummidi ,  Mark A. Webster ,  Prakash B. Gothoskar

IPC: G02B6/12 ,  H04L1/00 ,  G02B6/293

CPC classification number: G02B6/12007 ,  H04L1/0071 ,  G02B2006/12107 ,  G02B2006/12164 ,  G02B6/29352 ,  G02B6/29386

Abstract: Fabrication-tolerant on-chip multiplexers and demultiplexers are provides via a lattice filter interleaver configured to receive an input signal including a plurality of individual signals and to produce a first interleaved signal with a first subset of the plurality of individual signals and a second interleaved signal with a second subset of the plurality of individual signals; a first Bragg interleaver configured to receive the first interleaved signal and produce a first output signal including a first individual signal of the plurality of individual signals and a second output signal including a second individual signal of the plurality of individual signals; and a second Bragg interleaver configured to receive the second interleaved signal and produce a third output signal including a third individual signal of the plurality of individual signals and a fourth output signal including a fourth individual signal of the plurality of individual signals.

公开(公告)号：US11762159B2

公开(公告)日：2023-09-19

申请号：US17302854

申请日：2021-05-13

Applicant: Cisco Technology, Inc.

Inventor： Prakash B. Gothoskar ,  Vipulkumar K. Patel ,  Soha Namnabat ,  Ravi S. Tummidi

IPC: G02B6/12 ,  G02B6/30 ,  G02B6/42 ,  H01L31/0232 ,  H01L31/0352 ,  H01L31/105 ,  G02B6/122

CPC classification number: G02B6/4298 ,  G02B6/12004 ,  G02B6/305 ,  G02B6/4203 ,  H01L31/02327 ,  H01L31/03529 ,  H01L31/1055 ,  G02B6/1228 ,  G02B2006/12123

Abstract: Embodiments described herein include an apparatus comprising a semiconductor-based photodiode disposed on a semiconductor layer, and an optical waveguide spaced apart from the semiconductor layer and evanescently coupled with a depletion region of the photodiode. The photodiode may be arranged as a vertical photodiode or a lateral photodiode.

公开(公告)号：US11693200B2

公开(公告)日：2023-07-04

申请号：US17305986

申请日：2021-07-19

Applicant: Cisco Technology, Inc.

Inventor： Vipulkumar K. Patel ,  Ravi S. Tummidi ,  Mark A. Webster

IPC: G02B6/43 ,  G02B6/42

CPC classification number: G02B6/43 ,  G02B6/425 ,  G02B6/4236 ,  G02B6/4274 ,  G02B6/4204

Abstract: Embodiments herein describe using a double wafer bonding process to form a photonic device. In one embodiment, during the bonding process, an optical element (e.g., a high precision optical element) is optically coupled to an optical device in an active surface layer. In one example, the optical element comprises a nitride layer which can be patterned to form a nitride waveguide, passive optical multiplexer or demultiplexer, or an optical coupler.

公开(公告)号：US11523192B2

公开(公告)日：2022-12-06

申请号：US17305287

申请日：2021-07-02

Applicant: Cisco Technology, Inc.

Inventor： Tao Ling ,  Ravi S. Tummidi ,  Yi Ho Lee ,  Mark A. Webster

IPC: H04J14/00 ,  H04Q11/00 ,  H04J14/02

Abstract: Process margin relaxation is provided in relation to a compensated-for process via a first optical device, fabricated to satisfy an operational specification when a compensated-for process is within a first tolerance range; a second optical device, fabricated to satisfy the operational specification when the compensated-for process is within second tolerance range, different than the first tolerance range; a first optical switch connected to an input and configured to output an optical signal received from the input to one of the first optical device and the second optical device; and a second optical switch configured to combine outputs from the first optical device and the second optical device.

公开(公告)号：US11067765B2

公开(公告)日：2021-07-20

申请号：US16698458

申请日：2019-11-27

Applicant: Cisco Technology, Inc.

Inventor： Prakash B. Gothoskar ,  Vipulkumar K. Patel ,  Soha Namnabat ,  Ravi S. Tummidi

IPC: G02B6/122 ,  G02B6/30 ,  G02B6/42

Abstract: Embodiments described herein include an apparatus comprising a semiconductor-based photodiode disposed on a semiconductor layer, and an optical waveguide spaced apart from the semiconductor layer and evanescently coupled with a depletion region of the photodiode. The photodiode may be arranged as a vertical photodiode or a lateral photodiode.