公开(公告)号：US11381309B2

公开(公告)日：2022-07-05

申请号：US17236410

申请日：2021-04-21

Applicant: X Development LLC

Inventor： Nam-hyong Kim ,  Baris Erkmen ,  Andrei Kazmierski ,  Devin Brinkley ,  John Moody ,  Markus Demartini ,  Wei-cheng Lai ,  Halleh Balch

IPC: H04B10/00 ,  H04B10/112 ,  H04B10/67 ,  H04J14/00

Abstract: Aspects of the disclosure provide an optical communication system. The system may include a receiver lens system configured to receive a light beam from a remote optical communication system and direct the light beam to a photodetector. The system may also include the photodetector. The photodetector may be configured to convert the received light beam into an electrical signal, and the photodetector may be positioned at a focal plane of the receiver lens system. The system may also include a phase-aberrating element arranged with respect to the receiver lens system and the photodetector such that the phase-aberrating element is configured to provide uniform angular irradiance at the focal plane of the receiver lens system.

公开(公告)号：US11159249B2

公开(公告)日：2021-10-26

申请号：US17066624

申请日：2020-10-09

Applicant: X DEVELOPMENT LLC

Inventor： Bruce Moision ,  Devin Brinkley ,  Baris Ibrahim Erkmen

IPC: H04B10/80 ,  H04B10/291 ,  H04B10/564

Abstract: An optical communication system includes an optical transmitter and one or more processors. The optical transmitter is configured to output an optical signal, and includes an average-power-limited optical amplifier, such as an erbium-doped fiber amplifier (EDFA). The one or more processors are configured to receive optical signal data related to a received power for a communication link from a remote communication system and determine that the optical signal data is likely to fall below a minimum received power within a time interval. In response to the determination, the one or more processors are configured to determine a duty cycle of the optical transmitter based on a minimum on-cycle length and a predicted EDFA output power and operate the optical transmitter using the determined duty cycle to transmit an on-cycle power that is no less than the minimum required receiver power for error-free operation of the communication link.

公开(公告)号：US20210242940A1

公开(公告)日：2021-08-05

申请号：US17236410

申请日：2021-04-21

Applicant: X Development LLC

Inventor： Nam-hyong Kim ,  Baris Erkmen ,  Andrei Kazmierski ,  Devin Brinkley ,  John Moody ,  Markus Demartini ,  Wei-cheng Lai ,  Halleh Balch

IPC: H04B10/112 ,  H04B10/67

Abstract: Aspects of the disclosure provide an optical communication system. The system may include a receiver lens system configured to receive a light beam from a remote optical communication system and direct the light beam to a photodetector. The system may also include the photodetector. The photodetector may be configured to convert the received light beam into an electrical signal, and the photodetector may be positioned at a focal plane of the receiver lens system. The system may also include a phase-aberrating element arranged with respect to the receiver lens system and the photodetector such that the phase-aberrating element is configured to provide uniform angular irradiance at the focal plane of the receiver lens system.

公开(公告)号：US11054580B2

公开(公告)日：2021-07-06

申请号：US16818183

申请日：2020-03-13

Applicant: X DEVELOPMENT LLC

Inventor： Andrei Kazmierski ,  Nam-hyong Kim ,  Devin Brinkley ,  Baris Ibrahim Erkmen

IPC: G02B6/36 ,  G02B6/32 ,  F21V8/00 ,  G02B9/04 ,  G02B27/09

Abstract: An optical communication device is provided that includes a first lens having a first surface and a second surface, a second lens having a third surface and a fourth surface, an optical fiber configured to output light including a plurality of ray bundles, and a photodetector located at the fourth surface of the second lens. The first lens is configured to cause the light output from the optical fiber to form an image at an image plane located at the third surface of the second lens. The second lens is configured to cause subsets of the ray bundles received at the third surface of the second lens to intersect or overlap at the photodetector in a smaller cross-sectional area than at the third surface of the second lens.

公开(公告)号：US11018765B1

公开(公告)日：2021-05-25

申请号：US16697541

申请日：2019-11-27

Applicant: X Development LLC

Inventor： Nam-hyong Kim ,  Baris Erkmen ,  Andrei Kazmierski ,  Devin Brinkley ,  John Moody ,  Markus Demartini ,  Wei-cheng Lai ,  Halleh Balch

IPC: H04B10/00 ,  H04B10/112 ,  H04B10/67 ,  H04J14/00

Abstract: Aspects of the disclosure provide an optical communication system. The system may include a receiver lens system configured to receive a light beam from a remote optical communication system and direct the light beam to a photodetector. The system may also include the photodetector. The photodetector may be configured to convert the received light beam into an electrical signal, and the photodetector may be positioned at a focal plane of the receiver lens system. The system may also include a phase-aberrating element arranged with respect to the receiver lens system and the photodetector such that the phase-aberrating element is configured to provide uniform angular irradiance at the focal plane of the receiver lens system.

公开(公告)号：US20200177324A1

公开(公告)日：2020-06-04

申请号：US16781381

申请日：2020-02-04

Applicant: X DEVELOPMENT LLC

Inventor： Bruce Moision ,  Edward Keyes ,  Oliver Bowen ,  Devin Brinkley ,  Baris Erkmen

IPC: H04L1/18 ,  H04B10/112

Abstract: Aspects of the disclosure provide techniques for automatic repeat request (ARQ) in a free-space optical communication (FSOC) architecture. These techniques, including block-selective ARQ, adaptive retransmission delay, and random seed scrambling, can be used individually or in combination to combat problems involving frame loss or corruption. These techniques enable the system to rapidly recover by streamlining the retransmission process. For instance, block-selective ARQ acknowledges variable length blocks of frames in the return stream from the receiver to the transmitter. Adaptive retransmission delay allows the retransmission delay to grow in the absence of feedback by the receiver, up to some defined limit. And with random seed sampling, a scrambling sequence is incorporated to aid with frame syncing, which avoids the need for a line code. These aspects of the technology provide a robust communication process, and also reduce overhead costs associated with unnecessary retransmissions.

公开(公告)号：US20180191431A1

公开(公告)日：2018-07-05

申请号：US15393377

申请日：2016-12-29

Applicant: X Development LLC

Inventor： Bruce Moision ,  Edward Keyes ,  Oliver Bowen ,  Devin Brinkley ,  Baris Erkmen

IPC: H04B10/079 ,  H04L1/18 ,  H04B10/114

CPC classification number: H04L1/1864 ,  H04B10/1123 ,  H04L1/1809 ,  H04L1/1841 ,  H04L1/187 ,  H04L1/1874 ,  H04L1/188

Abstract: Aspects of the disclosure provide techniques for automatic repeat request (ARQ) in a free-space optical communication (FSOC) architecture. These techniques, including block-selective ARQ, adaptive retransmission delay, and random seed scrambling, can be used individually or in combination to combat problems involving frame loss or corruption. These techniques enable the system to rapidly recover by streamlining the retransmission process. For instance, block-selective ARQ acknowledges variable length blocks of frames in the return stream from the receiver to the transmitter. Adaptive retransmission delay allows the retransmission delay to grow in the absence of feedback by the receiver, up to some defined limit. And with random seed sampling, a scrambling sequence is incorporated to aid with frame syncing, which avoids the need for a line code. These aspects of the technology provide a robust communication process, and also reduce overhead costs associated with unnecessary retransmissions.

公开(公告)号：US12153324B2

公开(公告)日：2024-11-26

申请号：US17897410

申请日：2022-08-29

Applicant: X DEVELOPMENT LLC

Inventor： Devin Brinkley ,  Baris Ibrahim Erkmen ,  Joaquin Matres Abril ,  Paul Epp

IPC: H04B10/25 ,  G02B6/124 ,  G02F1/295 ,  H04B10/548 ,  G02B6/12

Abstract: An optical phased array (OPA) photonic integrated chip includes a plurality of array elements, a plurality of phase shifters, a plurality of combiners, and an edge coupler configured to couple to a single mode waveguide. The plurality of phase shifters includes a layer of phase shifters that has a phase shifter connected to each array element in the plurality of array elements. The plurality of combiners is configured to connect the plurality of phase shifters to the edge coupler. The plurality of combiners includes a first combiner that has a first output that is connected to a second combiner or the edge coupler, and a second output of the first combiner is connected to a photodetector. An in-phase light portion at the first combiner is output through the first output, and an out-of-phase light portion at the first combiner is output through the second output.

公开(公告)号：US20240310691A1

公开(公告)日：2024-09-19

申请号：US18586677

申请日：2024-02-26

Applicant: X DEVELOPMENT LLC

Inventor： Paul Epp ,  Devin Brinkley ,  Andrei Kazmierski

IPC: G02F1/29 ,  G02F1/313 ,  H01Q3/26 ,  H04B10/11

CPC classification number: G02F1/292 ,  G02F1/3134 ,  H01Q3/2676 ,  H04B10/11

Abstract: Aspects of the disclosure provide an optical communications terminal comprising an optical phased array (OPA) photonic integrated chip comprising a plurality of phase shifters arranged in a plurality of segments; one or more additional phase shifters, a plurality of switches corresponding to each of the plurality of segments; and one or more splitters The optical communications terminal further comprising a full array transceiver configured to allow for transmission and receipt of optical communications beams functionality with the plurality of segments; and a plurality of segment transceivers each associated with one of the plurality of segments.

公开(公告)号：US20240275484A1

公开(公告)日：2024-08-15

申请号：US18642915

申请日：2024-04-23

Applicant: X DEVELOPMENT LLC

Inventor： Baris Ibrahim Erkmen ,  Devin Brinkley ,  Paul Epp ,  John Moody

IPC: H04B10/112 ,  H04B10/50

CPC classification number: H04B10/112 ,  H04B10/503

Abstract: A free-space optical communication system includes an optical phased array (OPA) photonic integrated chip, a transceiver photonic integrated chip, and one or more processors. The OPA chip includes a plurality of array elements and a plurality of phase shifters. The transceiver chip includes one or more transmitter components and one or more receiver components. The one or more processors are configured to transmit a first signal via the OPA chip and the transceiver chip, and receive a second signal via the OPA chip and the transceiver chip.