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公开(公告)号：US12117650B2
公开(公告)日：2024-10-15
申请号：US18448429
申请日：2023-08-11
Applicant: Cisco Technology, Inc.
Inventor： Shiyi Chen , Tao Ling , Weizhuo Li , Mark A. Webster
CPC classification number: G02B6/29304 , G02B6/02261 , G02B6/124 , G02B6/2931 , G02B6/29311 , G02B6/30 , G02B6/3514 , G02B6/3526 , G02B2006/12102 , G02B2006/12111 , G02B6/1225 , G02B6/4214
Abstract: Embodiments include a fiber to photonic chip coupling system including a collimating lens which collimate a light transmitted from a light source and an optical grating including a plurality of grating sections. The system also includes an optical dispersion element which separates the collimated light from the collimating lens into a plurality of light beams and direct each of the plurality of light beams to a respective section of the plurality of grating sections. Each light beam in the plurality of light beams is diffracted from the optical dispersion element at a different wavelength a light beam of the plurality of light beams is directed to a respective section of the plurality of grating sections at a respective incidence angle based on the wavelength of the light beam of the plurality of light beams to provide optimum grating coupling.
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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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Patent Agency Ranking
公开(公告)号：US11822126B2
公开(公告)日：2023-11-21
申请号：US17654000
申请日：2022-03-08
Applicant: Cisco Technology, Inc.
Inventor： Tao Ling , Shiyi Chen
CPC classification number: G02B6/2821 , G02B6/125
Abstract: Embodiments herein describe a waveguide crossing that permits at least two optical signals to cross in two different directions. For example, one optical signal can propagate from left to right through the center of the waveguide crossing at the same time a second optical signal propagates up and down through the center of the crossing. In one embodiment, a circular disc is disposed at the center of the waveguide crossing through which the two (or more) optical signals pass. The shape of the circular disc can provide low insertion loss as the respective optical signals propagate between respective pairs of waveguides, as well as minimize cross talk between the two optical signals.
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公开(公告)号：US11754784B2
公开(公告)日：2023-09-12
申请号：US17447153
申请日：2021-09-08
Applicant: Cisco Technology, Inc.
Inventor： Tao Ling , Shiyi Chen , Xunyuan Zhang , Prakash B. Gothoskar
CPC classification number: G02B6/1228 , G02B6/0026 , G02B6/1223 , G02B6/124
Abstract: Embodiments presented in this disclosure generally relate to an optical device having a grating coupler for redirection of optical signals. One embodiment includes a grating coupler. The grating coupler generally includes a waveguide layer, a thickness of a waveguide layer portion of the waveguide layer being tapered, the thickness defining a direction, and a grating layer disposed above the waveguide layer and perpendicular to the direction where at least a grating layer portion of the grating layer overlaps the waveguide layer portion of the waveguide layer along the direction. Some embodiments are directed to grating coupler implemented with material layers above and a reflector layer below a grating layer, facilitating redirection and confinement of light that improves coupling loss and bandwidth. The material layers and reflector layer above and below the grating layer may be implemented with or without the waveguide layer being tapered.
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公开(公告)号：US11022757B1
公开(公告)日：2021-06-01
申请号：US16696957
申请日：2019-11-26
Applicant: Cisco Technology, Inc.
Inventor： Xunyuan Zhang , Shiyi Chen , Tao Ling , Prakash B. Gothoskar
Abstract: Embodiments herein describe a photonic platform where an AR coating is disposed between an optical grating and a semiconductor substrate. In one embodiment, the optical grating is disposed within an insulative layer. A first side of the insulative layer provides an optical interface where an external optical source can transmit an optical signal into, or a receive an optical signal from, the grating. A second, opposite side of the insulative layer contacts the AR coating. When the external optical source transmits light through the first side of the insulative layer, some of the light passes through the grating and reaches the AR coating. The AR coating prevents this light from being reflected back to the grating by the semiconductor layer which can cause interference that varies the coupling efficiency of the grating.
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公开(公告)号：US11762150B2
公开(公告)日：2023-09-19
申请号：US17663158
申请日：2022-05-12
Applicant: Cisco Technology, Inc.
Inventor： Shiyi Chen , Tao Ling , Weizhuo Li , Mark A. Webster
CPC classification number: G02B6/29304 , G02B6/02261 , G02B6/124 , G02B6/29311 , G02B6/30 , G02B6/3514 , G02B6/3526 , G02B6/1225 , G02B6/4214 , G02B2006/12102 , G02B2006/12111
Abstract: Embodiments include a fiber to photonic chip coupling system including a collimating lens which collimate a light transmitted from a light source and an optical grating including a plurality of grating sections. The system also includes an optical dispersion element which separates the collimated light from the collimating lens into a plurality of light beams and direct each of the plurality of light beams to a respective section of the plurality of grating sections. Each light beam in the plurality of light beams is diffracted from the optical dispersion element at a different wavelength a light beam of the plurality of light beams is directed to a respective section of the plurality of grating sections at a respective incidence angle based on the wavelength of the light beam of the plurality of light beams to provide optimum grating coupling.
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公开(公告)号：US11366270B2
公开(公告)日：2022-06-21
申请号：US16864104
申请日：2020-04-30
Applicant: Cisco Technology, Inc.
Inventor： Shiyi Chen , Tao Ling , Weizhuo Li , Mark A. Webster
Abstract: Embodiments include a fiber to photonic chip coupling system including a collimating lens which collimate a light transmitted from a light source and an optical grating including a plurality of grating sections. The system also includes an optical dispersion element which separates the collimated light from the collimating lens into a plurality of light beams and direct each of the plurality of light beams to a respective section of the plurality of grating sections. Each light beam in the plurality of light beams is diffracted from the optical dispersion element at a different wavelength a light beam of the plurality of light beams is directed to a respective section of the plurality of grating sections at a respective incidence angle based on the wavelength of the light beam of the plurality of light beams to provide optimum grating coupling.
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