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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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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：US12092863B2
公开(公告)日：2024-09-17
申请号：US17451247
申请日：2021-10-18
Applicant: Cisco Technology, Inc.
Inventor： Yi Ho Lee , Tao Ling , Ravi S. Tummidi , Mark A. Webster , Prakash B. Gothoskar
CPC classification number: G02B6/12007 , H04L1/0071 , G02B2006/12107 , G02B2006/12164 , G02B6/29352 , G02B6/29386
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.
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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：US11523192B2
公开(公告)日：2022-12-06
申请号：US17305287
申请日：2021-07-02
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：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：US10439726B1
公开(公告)日：2019-10-08
申请号：US16177737
申请日：2018-11-01
Applicant: Cisco Technology, Inc.
Inventor： Marco Mazzini , Alberto Cervasio , Tao Ling
IPC: H04B10/572 , H04B10/40 , H04B10/25 , G02B6/42 , H04B10/079
Abstract: A local node of an optical network obtains local operating parameters associated with a bi-directional link to a remote node of the optical network, including a nominal local wavelength and a local temperature. The local node also obtains remote operating parameters of the remote node, including a nominal remote wavelength and a remote temperature. The local node further determines a target local wavelength based on a comparison of the local operating parameters and the remote operating parameters, and tunes a local transmitter to generate light at the target local wavelength. The local node also tunes a local filter to transmit light at the target local wavelength and reflect light at a target remote wavelength. This may be done by exchanging a configuration identifier with the remote node. The configuration identifier from the remote node is encoded in pulses of light from a remote transmitter in the remote node.
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