公开(公告)号：US20200336211A1

公开(公告)日：2020-10-22

申请号：US16855921

申请日：2020-04-22

Applicant: CABLE TELEVISION LABORATORIES, INC

Inventor： HAIPENG ZHANG ,  JUNWEN ZHANG ,  MU XU ,  ZHENSHENG JIA ,  LUIS ALBERTO CAMPOS

IPC: H04B10/50 ,  G02F1/21 ,  G02B27/28 ,  H01S5/323 ,  H01S5/32 ,  H04B10/516 ,  H04B10/25

Abstract: An optical full-field transmitter for an optical communications network includes a primary laser source configured to provide a narrow spectral linewidth for a primary laser signal, and a first intensity modulator in communication with a first amplitude data source. The first intensity modulator is configured to output a first amplitude-modulated optical signal from the laser signal. The transmitter further includes a first phase modulator in communication with a first phase data source and the first amplitude-modulated optical signal. The first phase modulator is configured to output a first two-stage full-field optical signal. The primary laser source has a structure based on a III-V compound semiconductor.

公开(公告)号：US20220407602A1

公开(公告)日：2022-12-22

申请号：US17821316

申请日：2022-08-22

Applicant: Cable Television Laboratories, Inc.

Inventor： MU XU ,  ZHENSHENG JIA ,  JUNWEN ZHANG ,  HAIPENG ZHANG ,  LUIS ALBERTO CAMPOS

IPC: H04B10/2507 ,  H04B10/69 ,  H04Q11/00 ,  H04B10/40

Abstract: An echo cancellation method includes steps of (a) extracting phase-distortion estimates, (b) reconstructing an echo signal, (c) generating a clean signal, and (d) producing a primary signal. Step (a) includes extracting, from a first phase signal, a plurality of phase-distortion estimates, the first phase signal having been estimated from an echo-corrupted signal received at a first coherent transceiver of a coherent optical network. Step (b) includes reconstructing an echo signal from the plurality of phase-distortion estimates and a transmitted signal transmitted by the first coherent transceiver. Step (c) includes generating a clean signal as a difference between the reconstructed echo signal and the first phase signal. Step (d) includes producing a primary signal by mapping each of a plurality of clean-phase estimates of the clean signal to one of a plurality of constellation symbols associated with a modulation scheme of the primary signal.

公开(公告)号：US20220337320A1

公开(公告)日：2022-10-20

申请号：US17854564

申请日：2022-06-30

Applicant: CABLE TELEVISION LABORATORIES, INC.

Inventor： HAIPENG ZHANG ,  JUNWEN ZHANG ,  MU XU ,  ZHENSHENG JIA ,  LUIS ALBERTO CAMPOS

IPC: H04B10/50 ,  G02F1/21 ,  G02B27/28 ,  H01S5/32 ,  H04B10/516 ,  H04B10/25 ,  H01S5/323

Abstract: An optical full-field transmitter for an optical communications network includes a primary laser source configured to provide a narrow spectral linewidth for a primary laser signal, and a first intensity modulator in communication with a first amplitude data source. The first intensity modulator is configured to output a first amplitude-modulated optical signal from the laser signal. The transmitter further includes a first phase modulator in communication with a first phase data source and the first amplitude-modulated optical signal. The first phase modulator is configured to output a first two-stage full-field optical signal. The primary laser source has a structure based on a III-V compound semiconductor.

公开(公告)号：US20250007619A1

公开(公告)日：2025-01-02

申请号：US18886474

申请日：2024-09-16

Applicant: CABLE TELEVISION LABORATORIES, INC.

Inventor： HAIPENG ZHANG ,  JUNWEN ZHANG ,  JINGJIE ZHU ,  MU XU ,  ZHENSHENG JIA

IPC: H04B10/69 ,  H04B10/516

Abstract: A method for allocating bandwidth to a first ONU, a second ONU, M1 ONUs, and M2 ONUs includes, during an allocation cycle, (i) granting a respective upstream time slot to, of a plurality of N ONUs, only each of the M1 ONUs, and (ii) granting a first upstream time slot to the first ONU. Each of the M1 ONUs and M2 ONUs is one of the plurality of N ONUs. The method also includes, during a subsequent cycle, (i) granting a respective upstream time slot to, of the plurality of N ONUs, only each of the M2 ONUs. The N ONUs includes a skipped-ONU that is one of either, and not both, the M1 ONUs and the M2 ONUs. The method includes, during the subsequent allocation cycle, granting a second upstream time slot to a second ONU, which is not one of the plurality of N ONUs.

公开(公告)号：US20240405907A1

公开(公告)日：2024-12-05

申请号：US18801036

申请日：2024-08-12

Applicant: CABLE TELEVISION LABORATORIES, INC.

Inventor： MU XU ,  ZHENSHENG JIA ,  HAIPENG ZHANG ,  LUIS ALBERTO CAMPOS

IPC: H04J4/00 ,  H04L5/26

Abstract: A method for extracting a plurality of data streams from a time-frequency division multiplexed (TFDM) signal includes determining a plurality of sub-channels of the TFDM signal, where each of the plurality of sub-channels has a respective one of a plurality of frequency ranges. The method also includes down-converting, based on the plurality of frequency ranges, the TFDM signal into a plurality of down-converted signals, where each down-converted signal corresponds to a respective one of the plurality of sub-channels. The method also includes extracting the plurality of data streams from a respective one of the plurality of down-converted signals.