公开(公告)号：US20170294966A1

公开(公告)日：2017-10-12

申请号：US15283632

申请日：2016-10-03

Applicant: CABLE TELEVISION LABORATORIES, INC

Inventor： Zhensheng Jia ,  Luis Alberto Campos ,  Curtis Dean Knittle

IPC: H04B10/50 ,  H04B10/532 ,  H04B10/63 ,  H04J14/04 ,  H04J14/06

CPC classification number: H04B10/504 ,  H04B10/502 ,  H04B10/505 ,  H04B10/506 ,  H04B10/532 ,  H04B10/63 ,  H04B10/64 ,  H04J14/04 ,  H04J14/06

Abstract: An injection locked transmitter for an optical communication network includes a master seed laser source input substantially confined to a single longitudinal mode, an input data stream, and a laser injected modulator including at least one slave laser having a resonator frequency that is injection locked to a frequency of the single longitudinal mode of the master seed laser source. The laser injected modulator is configured to receive the master seed laser source input and the input data stream, and output a laser modulated data stream.

公开(公告)号：US12184401B1

公开(公告)日：2024-12-31

申请号：US17966710

申请日：2022-10-14

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：US20240421912A1

公开(公告)日：2024-12-19

申请号：US18815567

申请日：2024-08-26

Applicant: CABLE TELEVISION LABORATORIES, INC.

Inventor： Luis Alberto Campos ,  Zhensheng Jia

IPC: H04B10/61 ,  H04B10/27 ,  H04Q11/00

Abstract: An optical transceiver is provided for a network communication system utilizing a coherent passive optical network (CPON). The optical transceiver includes a downstream transmitter in operable communication with an optical communication medium. The downstream transmitter is configured to schedule upstream resource allocation blocks to first and second downstream transceivers disposed along the optical communication medium at different respective locations remote from the optical transceiver. The optical transceiver further includes an upstream burst receiver system configured to simultaneously detect (i) a first upstream burst transmission sent from the first downstream transceiver along a first frequency subchannel of an optical spectrum of the CPON, and (ii) a second upstream burst transmission sent from the second downstream transceiver along a second frequency subchannel of the optical spectrum different from the first frequency subchannel. The first and second upstream burst transmissions do not overlap in the frequency domain.

公开(公告)号：US12167185B1

公开(公告)日：2024-12-10

申请号：US18158147

申请日：2023-01-23

Applicant: CABLE TELEVISION LABORATORIES, INC.

Inventor： Mu Xu ,  Luis Alberto Campos ,  Zhensheng Jia ,  Lin Cheng

IPC: H01Q3/26 ,  H01Q3/34 ,  H04B10/11 ,  H04B10/25 ,  H04J14/02 ,  H04Q11/00 ,  H01Q5/25

Abstract: A radio frequency (RF) beam transmission component having optical inputs and electrical outputs may include a wavelength selective switch (WSS) that has a plurality of optical WSS outputs. Each optical WSS output may be configured to transmit one or more wavelengths of the incoming optical signals. The RF beam transmission component may include a plurality of photodetectors (PD), each photodetector having an optical PD input coupled to one or more of said plurality of optical WSS outputs and a corresponding electrical output of a plurality of PD electrical outputs. The RF beam transmission component may further include a lens that has a plurality of electrical inputs and each electrical input may be electrically coupled to at least one of the plurality of electrical PD outputs. The lens may further have a plurality of electrical lens output ports.

公开(公告)号：US12132522B1

公开(公告)日：2024-10-29

申请号：US18214191

申请日：2023-06-26

Applicant: CABLE TELEVISION LABORATORIES, INC.

Inventor： Haipeng Zhang ,  Junwen Zhang ,  Mu Xu ,  Zhensheng Jia ,  Luis Alberto Campos

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

CPC classification number: H04B10/504 ,  G02B27/283 ,  G02B27/286 ,  G02F1/218 ,  H01S5/3224 ,  H01S5/32391 ,  H04B10/25 ,  H04B10/5161 ,  G02F1/212

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：US12074646B1

公开(公告)日：2024-08-27

申请号：US17896541

申请日：2022-08-26

Applicant: CABLE TELEVISION LABORATORIES, INC.

Inventor： Luis Alberto Campos ,  Zhensheng Jia

IPC: H04B10/61 ,  H04B10/27 ,  H04Q11/00

CPC classification number: H04B10/612 ,  H04B10/27 ,  H04Q11/0067

Abstract: An optical transceiver is provided for a network communication system utilizing a coherent passive optical network (CPON). The optical transceiver includes a downstream transmitter in operable communication with an optical communication medium. The downstream transmitter is configured to schedule upstream resource allocation blocks to first and second downstream transceivers disposed along the optical communication medium at different respective locations remote from the optical transceiver. The optical transceiver further includes an upstream burst receiver system configured to simultaneously detect (i) a first upstream burst transmission sent from the first downstream transceiver along a first frequency subchannel of an optical spectrum of the CPON, and (ii) a second upstream burst transmission sent from the second downstream transceiver along a second frequency subchannel of the optical spectrum different from the first frequency subchannel. The first and second upstream burst transmissions do not overlap in the frequency domain.

公开(公告)号：US12063107B1

公开(公告)日：2024-08-13

申请号：US17949974

申请日：2022-09-21

Applicant: CABLE TELEVISION LABORATORIES, INC.

Inventor： Mu Xu ,  Zhensheng Jia ,  Haipeng Zhang ,  Luis Alberto Campos

IPC: H04J4/00 ,  H04L5/26

CPC classification number: H04J4/005 ,  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.

公开(公告)号：US11990937B2

公开(公告)日：2024-05-21

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 ,  H04B10/40 ,  H04B10/69 ,  H04Q11/00

CPC classification number: H04B10/2572 ,  H04B10/40 ,  H04B10/6971 ,  H04Q11/0067 ,  H04Q2213/1319

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：US11979328B1

公开(公告)日：2024-05-07

申请号：US17242535

申请日：2021-04-28

Applicant: Cable Television Laboratories, Inc.

Inventor： Junwen Zhang ,  Bernardo Huberman ,  Jingjie Zhu ,  Karthik Sundaresan ,  Zhensheng Jia

IPC: H04L12/851 ,  G06N3/04 ,  G06N3/08 ,  H04L47/2441

CPC classification number: H04L47/2441 ,  G06N3/04 ,  G06N3/08

Abstract: A method for traffic flow classification in a communication network includes (1) identifying a traffic flow in communication network traffic, (2) extracting features of the traffic flow, and (3) using a machine learning model, classifying the traffic flow at least partially based on the features of the traffic flow. The features of the traffic flow include, for example, a distribution of packet size values of a sliding window sample of the traffic flow, a distribution of inter-arrival time values of a sliding window sample of the traffic flow, standard deviation of data packet size, average of data packet size, standard deviation of data packet inter-arrival time, and average of data packet inter-arrival time.

公开(公告)号：US11888525B2

公开(公告)日：2024-01-30

申请号：US17170403

申请日：2021-02-08

Applicant: CABLE TELEVISION LABORATORIES, INC.

Inventor： Zhensheng Jia ,  Luis Alberto Campos ,  Jing Wang ,  Mu Xu ,  Haipeng Zhang ,  Curtis Dean Knittle

IPC: H04B10/40 ,  H04B10/61 ,  H04B10/50 ,  H04L5/14 ,  H04B10/25

CPC classification number: H04B10/40 ,  H04B10/25891 ,  H04B10/50 ,  H04B10/61 ,  H04L5/14

Abstract: A full duplex communication network includes an optical transmitter end having a first coherent optics transceiver, an optical receiver end having a second coherent optics transceiver, and an optical transport medium operably coupling the first coherent optics transceiver to the second coherent optics transceiver. The first coherent optics transceiver is configured to simultaneously transmit a downstream optical signal and receive an upstream optical signal. The second coherent optics transceiver is configured to simultaneously receive the downstream optical signal from the first coherent optics transceiver and transmit the upstream optical signal first coherent optics transceiver. At least one of the downstream optical signal and the upstream optical signal includes at least one coherent optical carrier and at least one non-coherent optical carrier.