公开(公告)号：US11082143B2

公开(公告)日：2021-08-03

申请号：US16543509

申请日：2019-08-16

Applicant: CABLE TELEVISION LABORATORIES, INC

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

IPC: H04J14/00 ,  H04B10/43 ,  H04J14/02 ,  H04L5/14 ,  H04B10/25

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.

公开(公告)号：US10958345B1

公开(公告)日：2021-03-23

申请号：US16869265

申请日：2020-05-07

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：US10944478B2

公开(公告)日：2021-03-09

申请号：US16711293

申请日：2019-12-11

Applicant: CABLE TELEVISION LABORATORIES, INC

Inventor： Junwen Zhang ,  Zhensheng Jia ,  Luis Alberto Campos ,  Haipeng Zhang ,  Mu Xu ,  Jing Wang ,  Curtis Dean Knittie ,  Chuang Zhou

IPC: H04B10/04 ,  H04B10/50 ,  H04J14/06 ,  H04J14/04 ,  H04B10/63 ,  H04B10/64 ,  H04B10/532

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：US10917175B2

公开(公告)日：2021-02-09

申请号：US16676295

申请日：2019-11-06

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

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.

公开(公告)号：US20190393974A1

公开(公告)日：2019-12-26

申请号：US16453836

申请日：2019-06-26

Applicant: CABLE TELEVISION LABORATORIES, INC

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

IPC: H04J14/02 ,  H04B10/2519 ,  H04J14/00 ,  H04B10/532 ,  H04B10/516 ,  H04B10/27

Abstract: An optical communication network includes a downstream optical transceiver. The downstream optical transceiver includes at least one coherent optical transmitter configured to transmit a downstream coherent dual-band optical signal having a left-side band portion, a right-side band portion, and a central optical carrier disposed within a guard band between the left-side band portion and the right-side band portion. The network further includes an optical transport medium configured to carry the downstream coherent dual-band optical signal from the downstream optical transceiver. The network further includes at least one modem device operably coupled to the optical transport medium and configured to receive the downstream coherent dual-band optical signal from the optical transport medium. The at least one modem device includes a downstream coherent optical receiver, and a first slave laser injection locked to a frequency of the central optical carrier.

公开(公告)号：US12255691B1

公开(公告)日：2025-03-18

申请号：US18384969

申请日：2023-10-30

Applicant: CABLE TELEVISION LABORATORIES, INC.

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

IPC: H04B10/50 ,  H04B10/516

Abstract: An optical full-field transmitter (OFFT) includes a plurality of optical circulators and a polarization beam combiner. The plurality of optical circulators are fabricated on a silicon-on-insulator (SOI) substrate, where each of the optical circulators has (a) a first port that optically couples to a high-quality optical source, (b) a second port that optically couples to a child laser configured to receive amplitude modulation data, and (c) a third port optically coupled to a phase modulator that (i) is configured to receive a phase modulation data and (ii) includes an output port that outputs amplitude and phase modulated light. The polarization beam combiner receives the amplitude and phase modulated light from each of the optical circulators and outputs combined amplitude and phase modulated light.

公开(公告)号：US12244349B1

公开(公告)日：2025-03-04

申请号：US18482958

申请日：2023-10-09

Applicant: Cable Television Laboratories, Inc.

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

IPC: H04B10/50 ,  H04B10/079 ,  H04B10/27 ,  H04B10/556 ,  H04B10/564 ,  H04J14/02

Abstract: A method for tuning a power characteristic of an optical frequency comb includes controlling a modulating light source according to a plurality of modulation parameters to generate an optical frequency comb including a plurality of optical tones. Additionally, at least one of the plurality of modulation parameters is changed until a total power of the plurality of optical tones is greater than or equal to a minimum threshold value. Furthermore, at least one of the plurality of modulation parameters are changed until respective powers of each of the plurality of optical tones are within a predetermined proximity to respective target powers of each of the plurality of optical tones.

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：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.