公开(公告)号：US20200295834A1

公开(公告)日：2020-09-17

申请号：US16760098

申请日：2018-11-05

Applicant: CABLE TELEVISION LABORATORIES, INC.

Inventor： LUIS ALBERTO CAMPOS ,  ZHENSHENG JIA ,  JING WANG

IPC: H04B10/2575 ,  H04J14/02 ,  H04B10/532 ,  H04B10/61

Abstract: An optical access network includes an optical hub having at least one processor, and a plurality of optical fiber strands. Each optical fiber strand has a first strand end connected to the optical hub. The network further includes a plurality of nodes connected to at least one segment of a first fiber strand of the plurality of optical fiber strands. Each node is sequentially disposed at respective locations along the first fiber strand at different differences from the optical hub, respectively. The network further includes a plurality of end-points. Each end-point includes a receiver. Each respective receiver (i) has a different optical signal-to-noise ratio (OSNR) from the other receivers, (ii) is operably coupled with at least one node of the plurality of nodes, and (iii) is configured to receive the same optical wavelength signal from the first fiber strand as received by the other receivers.

公开(公告)号：US20250142237A1

公开(公告)日：2025-05-01

申请号：US18932344

申请日：2024-10-30

Applicant: CABLE TELEVISION LABORATORIES, INC.

Inventor： HAIPENG ZHANG ,  ZHENSHENG JIA

IPC: H04Q11/00 ,  H04B10/516 ,  H04J14/08

Abstract: An optical network communication system utilizes a CPON. The system includes an OLT and an ONU. The OLT includes an OLT transmitter for transmitting a downstream signal, and an OLT receiver for detecting an upstream signal. The downstream signal includes a first tone centered at a first frequency, a second tone centered at a second frequency, and first and second downstream subcarriers distributed proximate the first frequency. The upstream optical signal includes first and second upstream subcarriers distributed proximate the second frequency. The ONU includes an ONU receiver for detecting the first and second downstream subcarriers using the first optical tone to generate an LO signal for coherent detection, and an ONU transmitter configured to generate the first and second upstream subcarriers using the second optical tone. The first and second tones, downstream subcarriers, and upstream subcarriers do not overlap in the frequency domain

公开(公告)号：US20250133314A1

公开(公告)日：2025-04-24

申请号：US18925890

申请日：2024-10-24

Applicant: CABLE TELEVISION LABORATORIES, INC.

Inventor： ZHENSHENG JIA ,  HAIPENG ZHANG

IPC: H04Q11/00

Abstract: A CPON includes an OLT for transmitting a downstream signal to a plurality of remote ONUs. The downstream signal includes a first data subcarrier and a second subcarrier adjacent the first subcarrier, and a first communication subcarrier between the first and second subcarriers. The CPON further includes a first ONU having a first ONU receiver for receiving the first data subcarrier from the downstream optical signal within a first channel bandwidth, and a first ONU transmitter for transmitting a first upstream signal to the OLT within the first channel bandwidth. The CPON further includes a second ONU having a second ONU receiver for receiving the second data subcarrier from the downstream optical signal within a second channel bandwidth, and a second ONU transmitter for transmitting a second upstream signal to the OLT within the second channel bandwidth. The first communication subcarrier includes OAM management data and/or MAC layer control information.

公开(公告)号：US20250132855A1

公开(公告)日：2025-04-24

申请号：US19001001

申请日：2024-12-24

Applicant: CABLE TELEVISION LABORATORIES, INC.

Inventor： MU XU ,  LUIS ALBERTO CAMPOS ,  CURTIS D. KNITTLE ,  HAIPENG ZHANG ,  ZHENSHENG JIA

IPC: H04J14/02 ,  H04Q11/00

Abstract: A passive optical tap includes a first wavelength division multiplexer (WDM), a second WDM, a first optical splitter, and a second optical splitter. The first wavelength division multiplexer (WDM) has a first plurality of single-channel ports. The second WDM has a second plurality of single-channel ports. The first optical splitter has a first combined-power port optically coupled to a first one of the first plurality of single-channel ports and a first split-power port optically coupled to a first one of the second plurality of single-channel ports. The second optical splitter has a second combined-power port optically coupled to a second one of the second plurality of single-channel ports and a second split-power port optically coupled to a second one of the first plurality of single-channel ports.

公开(公告)号：US20250112725A1

公开(公告)日：2025-04-03

申请号：US18981434

申请日：2024-12-13

Applicant: CABLE TELEVISION LABORATORIES, INC.

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

IPC: H04L1/00 ,  H04L1/20 ,  H04Q11/00

Abstract: Adaptive modulation coding schemes improve spectral efficiency of telecommunication networks by implementing MCSs specific to each of a plurality of end devices in operable communication with a hub. For example, the MCSs may be specific to a channel, a wavelength, a distance, or capabilities of an end device. The MCSs are selected to include the highest modulation format and highest forward error correction coding rate that can be applied to a telecommunication signal without surpassing a signal parameter threshold.

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：US20220312045A1

公开(公告)日：2022-09-29

申请号：US17839060

申请日：2022-06-13

Applicant: CABLE TELEVISION LABORATORIES, INC.

Inventor： ZHENSHENG JIA ,  LUIS ALBERTO CAMPOS ,  MU XU ,  JING WANG

IPC: H04N19/94 ,  H04N19/126 ,  H03M3/00 ,  H04J14/04 ,  H03M1/00 ,  H03M3/04 ,  H03M1/66 ,  H03M1/12 ,  H03M7/30

Abstract: An optical network includes a transmitting portion configured to (i) encode an input digitized sequence of data samples into a quantized sequence of data samples having a first number of digits per sample, (ii) map the quantized sequence of data samples into a compressed sequence of data samples having a second number of digits per sample, the second number being lower than the first number, and (iii) modulate the compressed sequence of data samples and transmit the modulated sequence over a digital optical link. The optical network further includes a receiving portion configured to (i) receive and demodulate the modulated sequence from the digital optical link, (ii) map the demodulated sequence from the second number of digits per sample into a decompressed sequence having the first number of digits per sample, and (iii) decode the decompressed sequence.