公开(公告)号：GB2584266B

公开(公告)日：2021-04-14

申请号：GB202016096

申请日：2017-06-20

Applicant: CABLE TELEVISION LABORATORIES INC

Inventor： LUIS ALBERTO CAMPOS ,  ZHENSHENG JIA

IPC: H04J14/02

Abstract: An optical network communication system includes an optical hub, an optical distribution center, at least one fiber segment, and at least two end users. The optical hub includes an intelligent configuration unit configured to monitor and multiplex at least two different optical signals into a single multiplexed heterogeneous signal. The optical distribution center is configured to individually separate the at least two different optical signals from the multiplexed heterogeneous signal. The at least one fiber segment connects the optical hub and the optical distribution center, and is configured to receive the multiplexed heterogeneous signal from the optical hub and distribute the multiplexed heterogeneous signal to the optical distribution center. The at least two end users each include a downstream receiver configured to receive one of the respective separated optical signals from the optical distribution center.

公开(公告)号：GB2577638A

公开(公告)日：2020-04-01

申请号：GB201915208

申请日：2017-06-20

Applicant: CABLE TELEVISION LABORATORIES INC

Inventor： LUIS ALBERTO CAMPOS ,  ZHENSHENG JIA

IPC: H04J14/02

Abstract: An optical network communication system includes an optical hub 442 at the head-end, an optical distribution centre 404, connected by at least one fibre segment 408, and at least two end users 406 downstream of the distribution centre. The optical hub includes an intelligent configuration unit (not shown) which multiplexes at least two different optical signals 441(1), 441(2), 441(3) into a single multiplexed heterogeneous signal. The optical distribution centre demultiplexes the heterogeneous signal. The heterogeneous optical signal comprises an optical signal of a first type and an optical signal of a second different type, each selected from the following: an analogue optical signal 418, an intensity modulated signal suitable for direct detection (e.g. PAM, RZ or NRZ), a signal suitable for coherent detection (e.g. BPSK, QPSK or higher order QAM), or a differentially modulated signal (e.g. DPSK or D-QPSK). Also claimed is a method of assigning wavelength spectrum based on characteristics of the fibre segment and parameters of the at least two different optical signals. The distribution centre may include a wavelength filter 446 and a downstream optical switch 448.

公开(公告)号：US20250167887A1

公开(公告)日：2025-05-22

申请号：US19033313

申请日：2025-01-21

Applicant: CABLE TELEVISION LABORATORIES, INC.

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

IPC: H04B10/077

Abstract: A fiber-optic network that uses as a hybrid telecommunication and sensing system when telecommunication signals and probe signals are transmitted across a shared fiber strand in either a co-propagated or counter-propagated direction is disclosed. Probe signals generated by a sensing termination system and/or by one or more end devices are used to analyze conditions affecting network hardware and/or events occurring within the fiber distribution area.

公开(公告)号：GB2565012B

公开(公告)日：2019-08-07

申请号：GB201818417

申请日：2017-03-21

Applicant: CABLE TELEVISION LABORATORIES INC

Inventor： ZHENSHENG JIA ,  LUIS ALBERTO CAMPOS ,  CURTIS DEAN KNITTLE

IPC: H04B10/50 ,  H04J14/02 ,  H04J14/06

Abstract: A transmitter for an optical communication network includes a primary laser source input substantially confined to a single longitudinal mode, an input data stream, and a modulator including at least one secondary laser having a resonator frequency of the single longitudinal mode of the primary laser source. The modulator is configured to receive the primary laser source input and the input data stream, and output a laser modulated data stream.

公开(公告)号：GB2565012A

公开(公告)日：2019-01-30

申请号：GB201818417

申请日：2017-03-21

Applicant: CABLE TELEVISION LABORATORIES INC

Inventor： ZHENSHENG JIA ,  LUIS ALBERTO CAMPOS ,  CURTIS DEAN KNITTLE

IPC: H04B10/50 ,  H04J14/02 ,  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：GB2584266A

公开(公告)日：2020-11-25

申请号：GB202016096

申请日：2017-06-20

Applicant: CABLE TELEVISION LABORATORIES INC

Inventor： LUIS ALBERTO CAMPOS ,  ZHENSHENG JIA

IPC: H04J14/02

Abstract: This application discloses distributing a heterogenous optical signal over a fibre segment of an optical network. The heterogeneous optical signal comprises an optical signal component of a first type and an optical signal component of a second different type, each selected from the following: an analogue optical signal, an intensity modulated signal suitable for direct detection (e.g. PAM, RZ or NRZ), a signal suitable for coherent detection (e.g. BPSK, QPSK or higher order QAM), or a differentially modulated signal (e.g. DPSK or D-QPSK). The invention relates to assigning wavelength spectrum to each component signal of the heterogenous optical signal, based on a characteristic of the fibre segment and parameters of the component optical signals. The fibre segment characteristic may be fibre type, fibre length, implementation of amplification or loss devices, implementation of wavelength filters or splitters, or network topology. The parameters of the component optical signals may include optical power levels, wavelength, wavelength spacing, modulation format, modulation bandwidth, channel coding/decoding, polarisation multiplexing or forward error correction.

公开(公告)号：GB2577638B

公开(公告)日：2020-11-25

申请号：GB201915208

申请日：2017-06-20

Applicant: CABLE TELEVISION LABORATORIES INC

Inventor： LUIS ALBERTO CAMPOS ,  ZHENSHENG JIA

IPC: H04J14/02

Abstract: An optical network communication system includes an optical hub, an optical distribution center, at least one fiber segment, and at least two end users. The optical hub includes an intelligent configuration unit configured to monitor and multiplex at least two different optical signals into a single multiplexed heterogeneous signal. The optical distribution center is configured to individually separate the at least two different optical signals from the multiplexed heterogeneous signal. The at least one fiber segment connects the optical hub and the optical distribution center, and is configured to receive the multiplexed heterogeneous signal from the optical hub and distribute the multiplexed heterogeneous signal to the optical distribution center. The at least two end users each include a downstream receiver configured to receive one of the respective separated optical signals from the optical distribution center.

公开(公告)号：GB2573218B

公开(公告)日：2020-07-01

申请号：GB201908992

申请日：2017-03-21

Applicant: CABLE TELEVISION LABORATORIES INC

Inventor： ZHENSHENG JIA ,  LUIS ALBERTO CAMPOS ,  CURTIS DEAN KNITTLE

IPC: H04B10/64 ,  H04B10/50

Abstract: A transmitter for an optical communication network includes a primary laser source input substantially confined to a single longitudinal mode, an input data stream, and a modulator including at least one secondary laser having a resonator frequency of the single longitudinal mode of the primary laser source. The modulator is configured to receive the primary laser source input and the input data stream, and output a laser modulated data stream.

公开(公告)号：GB2573218A

公开(公告)日：2019-10-30

申请号：GB201908992

申请日：2017-03-21

Applicant: CABLE TELEVISION LABORATORIES INC

Inventor： ZHENSHENG JIA ,  LUIS ALBERTO CAMPOS ,  CURTIS DEAN KNITTLE

IPC: H04B10/64 ,  H04B10/50

Abstract: An optical hub 102 has an optical frequency comb generator, which outputs a plurality, N, of phase synchronised unmodulated coherent tone pairs. A first transmitter 200 receives a data signal 208 and a first unmodulated coherent tone, 168, from a first tone pair and outputs a first modulated data stream 172. The first modulated data stream 172 and the other unmodulated tone, 170, of the first tone pair are transmitted to a receiver (150, Fig. 1), preferably after multiplexing (128, Fig. 1). The receiver uses the unmodulated tone from the first tone pair as a local oscillator source, so that coherent detection can be performed on the received first modulated data stream. The detection is preferably heterodyne. The optical hub preferably outputs a multiplexed unmodulated tone and modulated data stream for each of the other N-1 tone pairs. The transmitter preferably comprises a laser injected modulator 202 including a seed laser 204. The optical frequency comb generator is preferably fed by a master seed laser 118 confined to a single longitudinal mode.

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.