公开(公告)号：US12231170B1

公开(公告)日：2025-02-18

申请号：US18383149

申请日：2023-10-24

Applicant: CABLE TELEVISION LABORATORIES, INC.

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

IPC: H04B10/00 ,  H04B10/112 ,  H04B10/50 ,  H04B10/61

Abstract: A beam steering subsystem is provided in an optical communication system. The beam steering subsystem is configured for steering a free-space optical (FSO) beam from a first transceiver to a second transceiver disposed remotely from the first receiver. The beam steering subsystem includes a beam steering device disposed between the first transceiver and the second transceiver, and an optical tracking unit in optical communication and electrical communication with the beam steering device. The wherein the beam steering device is further configured to (i) receive the FSO beam from the first transceiver, (ii) receive an optical tracking signal from the second transceiver, (iii) optically relay the received optical tracking signal to the optical tracking unit, and (iv) steer the FSO beam to the second transceiver based on an electrical feedback control signal from optical tracking unit.

公开(公告)号：US12035083B1

公开(公告)日：2024-07-09

申请号：US17503643

申请日：2021-10-18

Applicant: CABLE TELEVISION LABORATORIES, INC.

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

IPC: H04Q11/00 ,  H04B10/40 ,  H04B10/61 ,  H04B10/66

CPC classification number: H04Q11/0062 ,  H04B10/40 ,  H04B10/61 ,  H04B10/66 ,  H04Q2011/0064

Abstract: An integrated transceiver is provided for a coherent optical communication network. The integrated transceiver includes a first optical transceiver portion configured to receive and transmit coherent optical signals from and to the coherent optical communication network, respectively. The integrated transceiver further includes a second optical transceiver portion configured to receive and transmit non-coherent optical signals respectively from and to a non-coherent optical communication network. The integrated transceiver further includes an integrated media access control (MAC) processor disposed between the first and second optical transceiver portions. The integrated MAC processor is configured to (i) exchange cooperative scheduling information from the first optical transceiver portion to the second optical transceiver portion, and (ii) enable the first optical transceiver portion to schedule data traffic between the coherent and non-coherent optical communication networks using scheduling information obtained from a control plane of the second optical transceiver portion.

公开(公告)号：US11996893B2

公开(公告)日：2024-05-28

申请号：US18092372

申请日：2023-01-02

Applicant: Cable Television Laboratories, Inc.

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

IPC: H04B10/04 ,  H04B10/50 ,  H04B10/532 ,  H04B10/63 ,  H04B10/64 ,  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：US11882316B2

公开(公告)日：2024-01-23

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

CPC classification number: H04N19/94 ,  H03M1/008 ,  H03M1/1235 ,  H03M1/664 ,  H03M3/04 ,  H03M3/41 ,  H03M3/504 ,  H03M7/30 ,  H04J14/04 ,  H04N19/126 ,  H03M7/3082

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.

公开(公告)号：US11881899B1

公开(公告)日：2024-01-23

申请号：US17827581

申请日：2022-05-27

Applicant: CABLE TELEVISION LABORATORIES, INC.

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

IPC: H04B10/61 ,  H04L25/49

CPC classification number: H04B10/6165 ,  H04B10/613 ,  H04L25/4917

Abstract: A receiver is provided for processing an input signal from a communication network. The receiver includes a processor and a memory configured to store computer executable instructions, which, when executed by the processor, cause the processor to (i) receive an input data signal including digital bit information, (ii) code the input data signal into a plurality of multi-level symbols, (iii) map the plurality of multi-level symbols into a plurality of constellation points in the phase domain, (iv) execute a first phase recovery subprocess on the plurality of constellation points to recover a first carrier phase of the input signal, (v) implement a Gaussian mixture model (GMM) on the recovered first carrier phase to generate an enhanced recovered carrier phase, and (vi) process the enhanced recovered carrier phase with a second phase recovery subprocess to reduce distortion from the input signal.

公开(公告)号：US11689286B1

公开(公告)日：2023-06-27

申请号：US17541868

申请日：2021-12-03

Applicant: Cable Television Laboratories, Inc.

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

IPC: H04B10/00 ,  H04B10/2507 ,  H04B10/58

CPC classification number: H04B10/2507 ,  H04B10/58

Abstract: A skew compensation system for a coherent optical communication network includes a transmitter and a receiver in operable communication with an optical transport medium of a coherent optical network. The transmitter includes a first transmitter-side tunable delay line configured to delay transmission of a first signal by a first skew amount, thereby producing a pre-compensated first signal. The receiver includes a first receiver-side tunable delay line configured to delay transmission of the pre-compensated first signal to a digital signal processor (DSP) of the receiver by a second skew amount, thereby producing a final signal that is both pre-compensated and post-compensated (i.e., fully compensated).

公开(公告)号：US20230118770A1

公开(公告)日：2023-04-20

申请号：US17977168

申请日：2022-10-31

Applicant: CABLE TELEVISION LABORATORIES, INC

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

IPC: H04B10/25 ,  H04L12/28 ,  H04B10/40

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 (i) transmit a downstream optical signal at a first wavelength, and (ii) simultaneously receive an upstream optical signal at a second wavelength. The second coherent optics transceiver is configured to (i) receive the downstream optical signal, and (ii) simultaneously transmit the upstream optical signal. The first wavelength has a first center frequency separated from a second center frequency of the second wavelength.

公开(公告)号：US11539441B1

公开(公告)日：2022-12-27

申请号：US17219563

申请日：2021-03-31

Applicant: CABLE TELEVISION LABORATORIES, INC.

Inventor： Mu Xu ,  Junwen Zhang ,  Haipeng Zhang ,  Zhensheng Jia ,  Luis Alberto Campos ,  Curtis D. Knittle

IPC: H04B10/516 ,  H04B10/2513

Abstract: A method for laser chirp precompensation includes modulating an amplitude of an optical signal, in response to an amplitude of one of (i) a chirp-compensated signal generated via distortion of an original modulated signal according to an inverse of a chirp-response function of a laser and (ii) a first signal derived from the chirp-compensated signal, to yield an amplitude-modulated optical signal. The method also includes modulating a phase of the amplitude-modulated optical signal in response to a phase of one of (i) the chirp-compensated signal and (ii) a second signal derived from the chirp-compensated signal to yield a chirp-compensated optical signal.

公开(公告)号：US11245970B1

公开(公告)日：2022-02-08

申请号：US17149589

申请日：2021-01-14

Applicant: CABLE TELEVISION LABORATORIES, INC.

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

IPC: H04B10/032 ,  H04Q11/00

Abstract: An optical link redundancy architecture includes an optical switch, an optical coupler, and an optical tap detector. The optical switch including a hub-side switch-port, a normal-mode switch-port, and a failover-mode switch-port. The optical coupler includes (i) a normal-mode coupler-port optically coupled to the normal-mode switch-port via a primary-path optical fiber, and (ii) a failover-mode coupler-port optically coupled to the failover-mode switch-port via a backup-path optical fiber. The optical tap detector (i) is optically coupled to the primary-path optical fiber, (ii) includes a monitor port communicatively coupled to the optical switch, and (iii) outputs a tap signal at the monitor port in response to an optical signal propagating in the primary-path optical fiber. The optical switch optically couples the hub-side switch-port to the failover-mode switch-port when the tap signal is less than a threshold value.

公开(公告)号：US20210167857A1

公开(公告)日：2021-06-03

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

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.