公开(公告)号：US20230076009A1

公开(公告)日：2023-03-09

申请号：US18056160

申请日：2022-11-16

Applicant: Cisco Technology, Inc.

Inventor： Tao LING ,  Ravi S. TUMMIDI ,  Yi Ho LEE ,  Mark A. WEBSTER

IPC: 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：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：US20210157068A1

公开(公告)日：2021-05-27

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: G02B6/42

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.

公开(公告)号：US20240272363A1

公开(公告)日：2024-08-15

申请号：US18168366

申请日：2023-02-13

Applicant: Cisco Technology, Inc.

Inventor： Tao LING ,  Ravi S. TUMMIDI ,  Shiyi CHEN

IPC: G02B6/293

CPC classification number: G02B6/29328 ,  G02B6/29389

Abstract: Embodiments herein describe a dual-layer Bragg grating that can be used as a dual-bandpass filter. In one embodiment, the dual-layer Bragg grating comprises at least two layers, each having an anti-symmetrical structure. In addition, the anti-symmetrical structures can have different pitches which are tuned to different bands. That is, the pitch of the anti-symmetrical structure in one layer can be set to reflect a first band in a received optical signal while the pitch of the anti-symmetrical structure in the other layer is set to reflect a second band in the received optical signal.

公开(公告)号：US20210286190A1

公开(公告)日：2021-09-16

申请号：US17301968

申请日：2021-04-20

Applicant: Cisco Technology, Inc.

Inventor： Tao LING ,  Yi Ho LEE ,  Ravi S. TUMMIDI ,  Mark A. WEBSTER

IPC: G02B27/42 ,  H04J14/02 ,  G02B27/10 ,  G02B5/18 ,  H04B10/40

Abstract: Aspects described herein include an optical apparatus comprising an input port configured to receive an optical signal comprising a plurality of wavelengths, and a plurality of output ports. Each output port is configured to output a respective wavelength of the plurality of wavelengths. The optical apparatus further comprises a first plurality of two-mode Bragg gratings in a cascaded arrangement. Each grating of the first plurality of two-mode Bragg gratings is configured to reflect a respective wavelength of the plurality of wavelengths toward a respective output port of the plurality of output ports, and transmit any remaining wavelengths of the plurality of wavelengths.

公开(公告)号：US20180313718A1

公开(公告)日：2018-11-01

申请号：US15582306

申请日：2017-04-28

Applicant: Cisco Technology, Inc.

Inventor： Matthew J. TRAVERSO ,  Ravi S. TUMMIDI ,  Mark A. WEBSTER ,  Sandeep RAZDAN

IPC: G01M11/00 ,  G02B6/12 ,  G02B6/13

CPC classification number: G01M11/30 ,  G02B6/12 ,  G02B6/122 ,  G02B6/13 ,  G02B2006/1213

Abstract: Embodiments herein describe techniques for testing optical components in a photonic chip using a testing structure disposed in a sacrificial region of a wafer. In one embodiment, the wafer is processed to form multiple photonic chips integrated into the wafer. While forming optical components in the photonic chips (e.g., modulators, detectors, waveguides, etc.), a testing structure can be formed in one or more sacrificial regions in the wafer. In one embodiment, the testing structure is arranged near an edge coupler in the photonic chip such that an optical signal can be transferred between the photonic chip and the testing structure. Moreover, the testing structure has a grating coupler disposed at or near a top surface of the wafer which permits optical signals to be transmitted into, or received from, the grating coupler when an optical probe is arranged above the grating coupler.

公开(公告)号：US20240393530A1

公开(公告)日：2024-11-28

申请号：US18791228

申请日：2024-07-31

Applicant: Cisco Technology, Inc.

Inventor： Yi Ho LEE ,  Tao LING ,  Ravi S. TUMMIDI ,  Mark A. WEBSTER ,  Prakash B. GOTHOSKAR

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

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：US20240159963A1

公开(公告)日：2024-05-16

申请号：US18054877

申请日：2022-11-11

Applicant: Cisco Technology, Inc.

Inventor： Tao LING ,  Shiyi CHEN ,  Jean-Luc J. TAMBASCO ,  Ravi S. TUMMIDI

IPC: G02B6/122

CPC classification number: G02B6/1228

Abstract: Embodiments herein describe optical splitters that receive an optical signal using a single mode waveguide where the signal is in a fundamental mode. An asymmetric taper can be used to convert a portion of the optical signal from the fundamental mode into a different order mode (e.g., the first-order mode). The optical splitter also includes an optical mode multiplexer with two branches. The portion of the optical signal having the first-order mode is transferred to a first branch of the optical mode mux while the remaining portion of the optical signal having the fundamental mode is transmitted using a second branch of the optical mode mux. Further, coupling the portion of the optical signal into the first branch converts the optical signal from the first-order mode back to the fundamental mode. Thus, both branches in the optical mode mux output optical signals in the fundamental mode.

公开(公告)号：US20210278615A1

公开(公告)日：2021-09-09

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: G02B6/42 ,  G02B6/30

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：US20210181419A1

公开(公告)日：2021-06-17

申请号：US17187477

申请日：2021-02-26

Applicant: Cisco Technology, Inc.

Inventor： Yi Ho LEE ,  Tao LING ,  Ravi S. TUMMIDI ,  Mark A. WEBSTER

IPC: G02B6/28 ,  H04B10/25

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 including a second width that is approximately equal to the first width.