公开(公告)号：US20200374011A1

公开(公告)日：2020-11-26

申请号：US16421666

申请日：2019-05-24

Applicant: Google LLC

Inventor： Xiang Zhou ,  Hong Liu

IPC: H04B10/61

Abstract: A low-power coherent receiver is enabled with enhanced performance for intra-datacenter reach optical interconnection applications using several techniques. The first is a coherent skew adjustment technique which enables lower-power baud-rate ADC sampling and baud-rate-spaced coherent equalization. The second is a real-valued or mixed-valued low-power coherent equalization technique, where a single-tap real-valued 4×4 MIMO equalizer plus four real-valued or two mixed-valued single-input single-out (SISO) equalizers are used for simultaneous polarization recovery, in-phase and quadrature (I/Q) phase error correction, and bandwidth equalization. The third is a power-efficient dual-DSP architecture to enhance coherent receiver performance, in which a complementary low-speed coherent DSP is introduced for optimal I/Q phase error correction and constellation decision parameters determination through more sophisticated algorithms that are too power hungry to be implemented in the primary high-speed DSP.

公开(公告)号：US20250055571A1

公开(公告)日：2025-02-13

申请号：US18931956

申请日：2024-10-30

Applicant: Google LLC

Inventor： Xiang Zhou ,  Cedric F. Lam ,  Hong Liu

IPC: H04B10/50 ,  G02B6/27 ,  G02B6/293 ,  G02B27/28 ,  H04B10/61

Abstract: The disclosed technology allows for 1+1 optical protection and may improve coherent module output optical power by 3 dB over similar transmitter (Tx) and receiver (Rx) implementation complexity, as well as allow for integration into existing datacenter formats.

公开(公告)号：US20250028661A1

公开(公告)日：2025-01-23

申请号：US18223332

申请日：2023-07-18

Applicant: Google LLC

Inventor： Horia Alexandru Toma ,  Zuowei Shen ,  William F. Edwards, JR. ,  Gurushankar Rajamani ,  Hong Liu ,  Ilyas Mohammed

IPC: G06F13/16

Abstract: The disclosure provides for high bandwidth processing through the sharing of memory dies over a plurality of computing dies via an optical interchange. The optical interchange may be configured so as to operate as both an optical switch and optical demultiplexer. The optical switch configuration for the optical interchange allows for data to be written from any computing die to one of a plurality of memory dies via an optical connection. The optical demultiplexer configuration allows for data to be broadcast from a memory die to a plurality of the computing dies.

公开(公告)号：US11956010B2

公开(公告)日：2024-04-09

申请号：US17892498

申请日：2022-08-22

Applicant: Google LLC

Inventor： Zuowei Shen ,  Biao He ,  Hong Liu

IPC: H04B10/00 ,  H04B10/038 ,  H04B10/073 ,  H04J14/00

CPC classification number: H04B10/038 ,  H04B10/0731

Abstract: The technology generally relates to determining a status of an optical channel between two components. For example, the components may be connected via an optical link including a plurality of optical channels. A first portion of the optical channels may be in use such that a second portion of the optical channels may be redundant channels. The component may include a test generator that transmits and receives a data pattern over each channel. The test generator may determine, based on the received data pattern, a status of each of the channels. If the status of a given channel is a failure status, the component may divert data for the given channel to a redundant channel.

公开(公告)号：US20240036278A1

公开(公告)日：2024-02-01

申请号：US17877041

申请日：2022-07-29

Applicant: Google LLC

Inventor： Horia Alexandru Toma ,  Zuowei Shen ,  Yujeong Shim ,  Teckgyu Kang ,  Jaesik Lee ,  Georgios Konstadinidis ,  Sukalpa Biswas ,  Hong Liu ,  Biao He

IPC: G02B6/42 ,  H01L23/367 ,  H01L23/473 ,  H01L25/16

CPC classification number: G02B6/4268 ,  G02B6/4274 ,  G02B6/4257 ,  H01L23/3675 ,  H01L23/473 ,  H01L25/167

Abstract: The technology generally relates to high bandwidth memory (HBM) and optical connectivity stacking. Disclosed systems and methods herein allow for 3D-stacking of HBM dies that are interconnected with an optical interface in a manner that allows for compact, high-performance computing. An optical chiplet can be configured to be placed onto a stack of HBM dies, with a cooling die that is positioned between the HBM dies and the optical chiplet. The optical chiplet may be configured to connect the HBM optics module package to one or more other components of the package via to one or more optical fibers.

公开(公告)号：US20230343768A1

公开(公告)日：2023-10-26

申请号：US17992241

申请日：2022-11-22

Applicant: Google LLC

Inventor： Horia Alexandru Toma ,  Zuowei Shen ,  Hong Liu ,  Yujeong Shim ,  Biao He ,  Jaesik Lee ,  Georgios Konstadinidis ,  Teckgyu Kang ,  Igor Arsovski ,  Sukalpa Biswas

IPC: H01L25/16

CPC classification number: H01L25/167

Abstract: The technology generally relates to disaggregating memory from an application specific integrated circuit (“ASIC”) package. For example, a high-bandwidth memory (“HBM”) optics module package may be connected to an ASIC package via one or more optical links. The HBM optics module package may include HBM dies(s), HBM chiplet(s) and an optical chiplet. The optical chiplet may be configured to connect the HBM optics module to one or more optical fibers that form an optical link with one or more other components of the ASIC package. By including an optical chiplet in the HBM optics module package, the HBM optics module package may be disaggregated from an ASIC package.

公开(公告)号：US20230283380A1

公开(公告)日：2023-09-07

申请号：US18196783

申请日：2023-05-12

Applicant: Google LLC

Inventor： Xiang Zhou ,  Cedric F. Lam ,  Ryohei Urata ,  Hong Liu

IPC: H04B10/532 ,  H04B10/548

CPC classification number: H04B10/532 ,  H04B10/548 ,  H04B10/60

Abstract: Coherent optical communications technology for recovery of 1D and 2D formatted optical signals. For example, 1D or 2D formatted signals that travel through fiber optic media may be recovered by separating the light into X- and Y-polarization components, rotating one polarization component (e.g., Y-component) into the polarization space of the other component (e.g., Y-component into the X-polarization space), delaying the rotated component enough to avoid destructive interference and combining the delayed component with the undelayed component to form a folded optical signal, which may then be processed as a X-polarized signal.

公开(公告)号：US20230224068A1

公开(公告)日：2023-07-13

申请号：US18124707

申请日：2023-03-22

Applicant: Google LLC

Inventor： Xiang Zhou ,  Cedric F. Lam ,  Ryohei Urata ,  Hong Liu

IPC: H04B10/61

CPC classification number: H04B10/6151

Abstract: Coherent optical communications technology for recovery of 1D and 2D formatted optical signals. For example, 1D or 2D formatted signals that travel through fiber optic media may be recovered by separating the light into X- and Y-polarization components, rotating one polarization component (e.g., Y-component) into the polarization space of the other component (e.g., Y-component into the X-polarization space), delaying the rotated component enough to avoid destructive interference and combining the delayed component with the undelayed component to form a folded optical signal, which may then be processed as a X-polarized signal.

公开(公告)号：US11641248B2

公开(公告)日：2023-05-02

申请号：US17228098

申请日：2021-04-12

Applicant: Google LLC

Inventor： Xiang Zhou ,  Cedric F. Lam ,  Ryohei Urata ,  Hong Liu

IPC: H04J14/02 ,  H04J14/06 ,  H04B10/50 ,  H04B10/61 ,  H04B10/60

Abstract: Coherent optical communications technology for recovery of 1D and 2D formatted optical signals. For example, 1D or 2D formatted signals that travel through fiber optic media may be recovered by separating the light into X- and Y-polarization components, rotating one polarization component (e.g., Y-component) into the polarization space of the other component (e.g., Y-component into the X-polarization space), delaying the rotated component enough to avoid destructive interference and combining the delayed component with the undelayed component to form a folded optical signal, which may then be processed as a X-polarized signal.

公开(公告)号：US20220278752A1

公开(公告)日：2022-09-01

申请号：US17228122

申请日：2021-04-12

Applicant: Google LLC

Inventor： Xiang Zhou ,  Cedric F. Lam ,  Ryohei Urata ,  Hong Liu

IPC: H04B10/532 ,  H04B10/548

Abstract: Coherent optical communications technology for recovery of 1D and 2D formatted optical signals. For example, 1D or 2D formatted signals that travel through fiber optic media may be recovered by separating the light into X- and Y-polarization components, rotating one polarization component (e.g., Y-component) into the polarization space of the other component (e.g., Y-component into the X-polarization space), delaying the rotated component enough to avoid destructive interference and combining the delayed component with the undelayed component to form a folded optical signal, which may then be processed as a X-polarized signal.