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公开(公告)号：US20210157033A1
公开(公告)日：2021-05-27
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：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.
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公开(公告)号：US20210341672A1
公开(公告)日：2021-11-04
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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Patent Agency Ranking
公开(公告)号：US20230384522A1
公开(公告)日：2023-11-30
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 , G02B6/3526 , G02B6/3514 , G02B6/30 , G02B6/29311 , G02B6/124 , G02B6/1225
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：US20230288639A1
公开(公告)日：2023-09-14
申请号：US17654000
申请日：2022-03-08
Applicant: Cisco Technology, Inc.
Inventor： Tao LING , Shiyi CHEN
IPC: G02B6/28
CPC classification number: G02B6/2821
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：US20230074516A1
公开(公告)日：2023-03-09
申请号：US17447153
申请日：2021-09-08
Applicant: Cisco Technology, Inc.
Inventor： Tao LING , Shiyi CHEN , Xunyuan ZHANG , Prakash B. GOTHOSKAR
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：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.
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公开(公告)号：US20220269004A1
公开(公告)日：2022-08-25
申请号：US17663158
申请日：2022-05-12
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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