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公开(公告)号：US12092864B2
公开(公告)日：2024-09-17
申请号：US18322297
申请日：2023-05-23
Applicant: Cisco Technology, Inc.
Inventor： Sujit Handanhal Ramachandra , Kirk L Stechschulte
CPC classification number: G02B6/12007 , G02B2006/12107 , G02B6/29338
Abstract: A compact micro electrical mechanical actuated ring-resonator includes a bus waveguide disposed on a platform; a ring resonator disposed on the platform, including at least a first optical coupler, wherein the ring resonator is optically coupled with the bus waveguide; and a selective waveguide disposed on a piezoelectric cantilever mounted in a trench defined in the platform, wherein the selective waveguide includes a second optical coupler and is controllable to selectively adjust a coupling ratio between the first optical coupler with the second optical coupler by physically changing a distance between the first optical coupler and the second optical coupler.
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公开(公告)号：US11808936B2
公开(公告)日：2023-11-07
申请号：US17526252
申请日：2021-11-15
Applicant: Cisco Technology, Inc.
Inventor： Sujit Handanhal Ramachandra , Matthew Stewart Johnson , Trang Thu Pham , Aidas A. Jakubenas
CPC classification number: G02B26/00 , G02B27/286
Abstract: A method of rotating polarization of light travelling in a waveguide includes receiving an optical signal having a first polarization state at a first section of the waveguide, the first section of the waveguide being disposed on a plane of a substrate, using a micro-electromechanical system (MEMS) device, angling a second section of the waveguide out of the plane of the substrate, and outputting the optical signal with a second polarization state, different from the first polarization state, on a third section of the waveguide, the third section of the waveguide also being disposed on the plane of the substrate. A control loop is provided to sense the polarization shift to control the angle of the MEMS device to compensate for that shift.
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Patent Agency Ranking
公开(公告)号：US11698487B2
公开(公告)日：2023-07-11
申请号：US17453780
申请日：2021-11-05
Applicant: Cisco Technology, Inc.
Inventor： Sujit Handanhal Ramachandra , Kirk L. Stechschulte
CPC classification number: G02B6/12007 , G02B6/29338 , G02B2006/12107
Abstract: A compact micro electrical mechanical actuated ring-resonator includes a bus waveguide disposed on a platform; a ring resonator disposed on the platform, including at least a first optical coupler, wherein the ring resonator is optically coupled with the bus waveguide; and a selective waveguide disposed on a piezoelectric cantilever mounted in a trench defined in the platform, wherein the selective waveguide includes a second optical coupler and is controllable to selectively adjust a coupling ratio between the first optical coupler with the second optical coupler by physically changing a distance between the first optical coupler and the second optical coupler.
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公开(公告)号：US11693292B2
公开(公告)日：2023-07-04
申请号：US17065220
申请日：2020-10-07
Applicant: Cisco Technology, Inc.
Inventor： Sujit Handanhal Ramachandra , Zhujun Yuan , Jonathan D. Austin , Prerak P. Shah
CPC classification number: G02F1/295 , G02F2201/302 , G02F2203/24
Abstract: An apparatus includes a cladding layer and a plurality of waveguides. The cladding layer includes a central axis. The plurality of waveguides are disposed within the cladding layer and receive a light from a light source. The plurality of waveguides have refractive indices that are adjustable to change a mode of the light such that the mode of the light is steered towards the central axis.
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公开(公告)号：US12191870B2
公开(公告)日：2025-01-07
申请号：US18162091
申请日：2023-01-31
Applicant: Cisco Technology, Inc.
Inventor： Abhishek Bhat , Sujit Handanhal Ramachandra
Abstract: Techniques to reduce or eliminate phase noise and jitter from a noisy clock signal. A method includes generating an electrical clock signal, generating a delayed optical clock signal based on the electrical clock signal, detecting a phase difference between the electrical clock signal and the delayed optical clock signal, and processing, based on the phase difference, the electrical clock signal to obtain a reduced phase noise version of the electrical clock signal.
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公开(公告)号：US20240259025A1
公开(公告)日：2024-08-01
申请号：US18162091
申请日：2023-01-31
Applicant: Cisco Technology, Inc.
Inventor： Abhishek Bhat , Sujit Handanhal Ramachandra
CPC classification number: H03L7/1075 , H03L7/0818
Abstract: Techniques to reduce or eliminate phase noise and jitter from a noisy clock signal. A method includes generating an electrical clock signal, generating a delayed optical clock signal based on the electrical clock signal, detecting a phase difference between the electrical clock signal and the delayed optical clock signal, and processing, based on the phase difference, the electrical clock signal to obtain a reduced phase noise version of the electrical clock signal.
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公开(公告)号：US20230152571A1
公开(公告)日：2023-05-18
申请号：US17526252
申请日：2021-11-15
Applicant: Cisco Technology, Inc.
Inventor： Sujit Handanhal Ramachandra , Matthew Stewart Johnson , Trang Thu Pham , Aidas A. Jakubenas
CPC classification number: G02B26/00 , G02B27/286
Abstract: A method of rotating polarization of light travelling in a waveguide includes receiving an optical signal having a first polarization state at a first section of the waveguide, the first section of the waveguide being disposed on a plane of a substrate, using a micro-electromechanical system (MEMS) device, angling a second section of the waveguide out of the plane of the substrate, and outputting the optical signal with a second polarization state, different from the first polarization state, on a third section of the waveguide, the third section of the waveguide also being disposed on the plane of the substrate. A control loop is provided to sense the polarization shift to control the angle of the MEMS device to compensate for that shift.
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