公开(公告)号：US20220278766A1

公开(公告)日：2022-09-01

申请号：US17228098

申请日：2021-04-12

Applicant: Google LLC

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

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

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：US20220150606A1

公开(公告)日：2022-05-12

申请号：US17363532

申请日：2021-06-30

Applicant: Google LLC

Inventor： Jill Berger ,  Kevin Yasumura ,  Xiang Zhou ,  Pedram Z. Dashti ,  Ryohei Urata

IPC: H04Q11/00 ,  G02B26/08 ,  G02B27/30 ,  G02B6/35

Abstract: An optical links diagnostic system (LDS) and its operation within an optical circuit switch (OCS) for measurement and diagnosis of fiber-optic network fiber performance and quality is disclosed. The LDS can contain two photodetectors, a laser source, and be coupled to an OCS. Optical circulators can further be linked to the OCS. The LDS can be used both as an optical time domain reflectometer (OTDR) or as an optical return loss (ORL) meter and can automate the diagnosis of the fiber optical network fiber insertion loss and return loss.

公开(公告)号：US20200280372A1

公开(公告)日：2020-09-03

申请号：US16517151

申请日：2019-07-19

Applicant: Google LLC

Inventor： Wenzao Li ,  Ryohei Urata ,  Xiang Zhou ,  Lieven Verslegers

IPC: H04B10/50 ,  H04B10/40 ,  H01S3/10 ,  H01S3/105 ,  H01S3/106 ,  H01S5/00

Abstract: A dual-mode optical transceiver is disclosed. The dual-mode optical transceiver includes a receiver section configured to receive both coherently modulated and intensity modulated optical signals and to be optically switched between a first receiver mode for direct detection and a second receiver mode for coherent detection, and a transmitter section including a nested Mach-Zehnder Modulator or a polarization multiplexed quad Mach-Zehnder Modulator configured to be operated in a first transmission mode to output an intensity modulated optical signal and a second transmission mode to output a coherently modulated optical signal. In some implementations, the dual-mode optical receiver includes an optical switch configured to selectively direct a received optical signal down a direct detection optical circuit or a coherent detection optical circuit based on a control signal applied to the optical switch.

公开(公告)号：US12061368B2

公开(公告)日：2024-08-13

申请号：US18203302

申请日：2023-05-30

Applicant: Google LLC

Inventor： Daoyi Wang ,  Ryohei Urata ,  Lieven Verslegers ,  Jan Petykiewicz

IPC: G02B6/42 ,  G02B6/12 ,  G02B6/30

CPC classification number: G02B6/4242 ,  G02B6/12 ,  G02B6/30 ,  G02B6/423 ,  G02B6/4249

Abstract: A system for passive alignment of fibers to an interface of a photonic integrated circuit (PIC) includes an input frame, an actuator, and an output frame. The actuator arranged to apply force along a force axis to the input frame. The output frame including a tip for picking up a plate and transferring the force thereto, the output frame being connected to the input frame such that the output frame may tilt relative to the input frame and the output frame is elastically biased relative to the input frame into a position wherein the tip is aligned on the force axis.

公开(公告)号：US11910134B2

公开(公告)日：2024-02-20

申请号：US17363532

申请日：2021-06-30

Applicant: Google LLC

Inventor： Jill Berger ,  Kevin Yasumura ,  Xiang Zhou ,  Pedram Z. Dashti ,  Ryohei Urata

IPC: H04B10/071 ,  H04B10/079 ,  H04Q11/00 ,  G02B6/35 ,  G02B26/08 ,  G02B27/30

CPC classification number: H04Q11/0005 ,  G02B6/3518 ,  G02B26/0833 ,  G02B27/30 ,  H04B10/071 ,  H04B10/0795 ,  H04Q2011/003 ,  H04Q2011/0039

Abstract: An optical links diagnostic system (LDS) and its operation within an optical circuit switch (OCS) for measurement and diagnosis of fiber-optic network fiber performance and quality is disclosed. The LDS can contain two photodetectors, a laser source, and be coupled to an OCS. Optical circulators can further be linked to the OCS. The LDS can be used both as an optical time domain reflectometer (OTDR) or as an optical return loss (ORL) meter and can automate the diagnosis of the fiber optical network fiber insertion loss and return loss.

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：US11726260B2

公开(公告)日：2023-08-15

申请号：US17036827

申请日：2020-09-29

Applicant: Google LLC

Inventor： Liming Wang ,  Ryohei Urata ,  Jan Petykiewicz ,  Jill Berger

IPC: G02B6/12 ,  G02B6/13 ,  G02B6/124 ,  G02B6/122 ,  H01L23/00

CPC classification number: G02B6/124 ,  G02B6/1228 ,  G02B6/13 ,  H01L24/16 ,  G02B2006/12107 ,  H01L2224/16225

Abstract: A photonic integrated circuit chip includes a substrate and a wafer on the substrate. The wafer itself includes a photonic grating coupler with a taper portion and grating features. The grating features extend from the taper portion toward the substrate.

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.