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公开(公告)号：US11360268B1
公开(公告)日：2022-06-14
申请号：US17249893
申请日：2021-03-17
Applicant: Cisco Technology, Inc.
Inventor： Tao Ling , Shiyi Chen , Ravi S. Tummidi
IPC: H04J14/04 , G02B6/293 , H04B10/2581 , H04B10/80
Abstract: Aspects described herein include a mode multiplexer comprising a first optical waveguide extending between a first port and a second port. A first input mode of an optical signal entering the first port is propagated through the first optical waveguide to the second port. The mode multiplexer further comprises a second optical waveguide configured to evanescently couple with a coupling section of the first optical waveguide. A second input mode of the optical signal entering the first port is propagated through the second optical waveguide to a third port. The first optical waveguide further defines a filtering section between the coupling section and the second port, the filtering section configured to filter the second input mode.
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公开(公告)号：US11089391B1
公开(公告)日：2021-08-10
申请号：US16862262
申请日：2020-04-29
Applicant: Cisco Technology, Inc.
Inventor： Tao Ling , Ravi S. Tummidi , Yi Ho Lee , Mark A. Webster
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.
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公开(公告)号：US11002980B1
公开(公告)日：2021-05-11
申请号：US16814721
申请日：2020-03-10
Applicant: Cisco Technology, Inc.
Inventor： Tao Ling , Yi Ho Lee , Ravi S. Tummidi , Mark A. Webster
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.
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4.发明授权公开(公告)号：US12276565B2
公开(公告)日：2025-04-15
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
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.
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公开(公告)号：US11520106B2
公开(公告)日：2022-12-06
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
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.
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Patent Agency Ranking
公开(公告)号：US11249246B2
公开(公告)日：2022-02-15
申请号：US17107298
申请日：2020-11-30
Applicant: Cisco Technology, Inc.
Inventor： Tao Ling , Yi Ho Lee , Ravi S. Tummidi , Mark A. Webster
IPC: G02B6/02 , G02B6/12 , G02B6/293 , H04J14/02 , H04B10/50 , H04B10/60 , H04B10/66 , H04B10/67 , H04J14/00 , H04B10/40
Abstract: Aspects described herein include an optical apparatus comprising a multiple-stage arrangement of two-mode Bragg gratings 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 an 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 an other of the second two wavelengths.
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公开(公告)号：US11467420B2
公开(公告)日：2022-10-11
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
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.
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公开(公告)号：US20200264391A1
公开(公告)日：2020-08-20
申请号：US16421801
申请日：2019-05-24
Applicant: Cisco Technology, Inc.
Inventor： Ravi S. Tummidi
IPC: G02B6/42
Abstract: Aspects disclosed herein include providing a photonic chip that includes an unetched side surface formed by a dicing process performed on a semiconductor wafer, and a first edge coupler that is optically exposed at the unetched side surface. The photonic chip is optically aligned with an external light-carrying medium. The first edge coupler is optically coupled with the external light-carrying medium through the unetched side surface.
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公开(公告)号：US10145758B2
公开(公告)日：2018-12-04
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
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.
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公开(公告)号：US12035082B2
公开(公告)日：2024-07-09
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
CPC classification number: H04Q11/0005 , H04J14/0204 , H04J14/0205 , H04J14/0216 , H04Q2011/0007
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.
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