公开(公告)号：US12231175B2

公开(公告)日：2025-02-18

申请号：US17529800

申请日：2021-11-18

Applicant: Infinera Corporation

Inventor： Mehdi Torbatian ,  Yuliang Gao ,  Ahmed Morra ,  Han Henry Sun ,  Yeongho Park

IPC: H04L27/26 ,  H04B10/079 ,  H04B10/2575 ,  H04B10/516 ,  H04B10/61 ,  H04L1/1607 ,  H04L7/00 ,  H04L25/03 ,  H04L27/00 ,  H04L69/22

Abstract: Joint estimation of the framer index and the frequency offset in an optical communication system are described among various other features. A transmitter can transmit data frames using pilot and framer symbols. A receiver can estimate the framer index and frequency offset using the pilot and framer symbols, and identify the beginning of a header portion of a data frame. By identifying the beginning of the header portion of a data frame, the receiver can then process data received from the transmitter in a manner synchronous to the manner in which the data was transmitted by the transmitter.

公开(公告)号：US12224804B2

公开(公告)日：2025-02-11

申请号：US18168250

申请日：2023-02-13

Applicant: Mitsubishi Electric Corporation

Inventor： Tsuyoshi Yoshida

IPC: H04B10/516

Abstract: A transmission code processing device includes: a signal point arrangement shaping encoding unit to perform conversion into a shaped bit of mi column; a systematic error correction encoding unit to generate a parity bit of mp column based on the shaped bit; a first symbol mapping unit to convert the shaped bit into a first modulation symbol; a second symbol mapping unit to convert the parity bit into a second modulation symbol; and a symbol multiplexing unit to multiplex the first and second modulation symbols, in which the first modulation symbol has one element in a first signal point set including ci signal point including an origin, the second modulation symbol has one element in cp signal point not including the origin, and the signal point arrangement shaping encoding unit performs signal point arrangement shaping in which the first modulation symbol has one element in the first signal point set.

公开(公告)号：US12212367B2

公开(公告)日：2025-01-28

申请号：US18015024

申请日：2021-07-07

Applicant: NATIONAL UNIVERSITY OF SINGAPORE

Inventor： Chao Wang ,  Ci Wen Lim ,  Koon Tong Goh

IPC: H04B10/516 ,  H04B10/54 ,  H04B10/556 ,  H04L9/08

Abstract: A method of encoding quantum information on one or several degrees of freedom of coherent states of photons of a baseband input optical signal, a quantum transmitter, and a computer-readable medium. The quantum transmitter comprises a modulator configured to encode quantum information on one or several degrees of freedom of coherent states of photons of a baseband input optical signal using sideband modulation of the baseband optical input signal.

公开(公告)号：US20250030949A1

公开(公告)日：2025-01-23

申请号：US18783141

申请日：2024-07-24

Applicant: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA

Inventor： Mitsuaki OSHIMA ,  Koji NAKANISHI ,  Hideki AOYAMA ,  Ikuo FUCHIGAMI ,  Hidehiko SHIN ,  Tsutomu MUKAI ,  Yosuke MATSUSHITA ,  Shigehiro IIDA ,  Kazunori YAMADA

IPC: H04N23/73 ,  H04B10/116 ,  H04B10/516

Abstract: A visible light communication method transmits a signal by visible light communication. The visible light communication method includes modulating the signal into a predetermined blinking pattern, and transmitting the signal by causing visible light to blink according to the predetermined blinking pattern and toward a wall, from a projector disposed in an indoor space surrounded by the wall. The visible light communication method also includes projecting video from the projector toward the wall, wherein the visible light is reflected by the wall to prevent the signal from being received outside of the indoor space, and the signal is used to transmit data related to the video projected to a terminal in the indoor space.

公开(公告)号：US20250015900A1

公开(公告)日：2025-01-09

申请号：US18211057

申请日：2023-06-16

Applicant: California Institute of Technology

Inventor： Mohammad Mirhosseini ,  Alkim Bozkurt ,  Han Zhao ,  Chaitali Joshi

IPC: H04B10/70 ,  G06N10/40 ,  H04B10/516

Abstract: Systems and methods for transducing and storing qubit signals are provided. The system includes a voltage source, a substrate, and a membrane suspended over the substrate. A phononic crystal oscillator is disposed in a first region of the membrane. The phononic crystal oscillator includes a capacitor having a moving electrode including an array of multiple phononic crystal unit cells. The moving electrode is connected to the voltage source. A superconducting circuit disposed in a second region of the membrane. A plurality of phonon shields and an optical resonator may also be disposed on the membrane.

公开(公告)号：US12191912B2

公开(公告)日：2025-01-07

申请号：US18334269

申请日：2023-06-13

Applicant: Ramot at Tel Aviv University Ltd.

Inventor： Yossef Ehrlichman ,  Ofer Amrani ,  Shlomo Ruschin

IPC: H03M1/00 ,  G02F1/01 ,  G02F1/225 ,  G02F7/00 ,  H03M1/70 ,  H04B10/25 ,  H04B10/2575 ,  H04B10/50 ,  H04B10/516 ,  H04B10/54 ,  H04B10/556 ,  G02F1/015 ,  G02F1/21

Abstract: In a system for converting digital data into a modulated optical signal, an electrically controllable device, including a modulator having one or more actuating electrodes, provides an analog-modulated optical signal that is modulated in response to output data bits of a digital-to-digital mapping. A digital-to-digital conversion provides the mapping of input data words to the output data bits. The mapping enables adjustments to correct for non-linearities and other undesirable characteristics, thereby improving signal quality.

公开(公告)号：US12176955B2

公开(公告)日：2024-12-24

申请号：US17968852

申请日：2022-10-19

Applicant: Dell Products L.P.

Inventor： David Piehler

IPC: H04J14/00 ,  H04B10/40 ,  H04B10/516

Abstract: An IC-TROSA optical network system includes an IC-TROSA device that is included in a coherent optical transmitter device on a transmitter device and that is coupled to at least one optical network to couple the transmitter device to at least one receiver device. The IC-TROSA device includes a quadrature optical modulator subsystem having a first optical directional coupler device with a first transmit connection that receives first optical signals from the quadrature optical modulator subsystem and transmits the first optical signals via the first transmit connection to the at least one receiver device via the at least one optical network, and with a second transmit connection that receives second optical signals from the quadrature optical modulator subsystem and transmits the second optical signals via the second transmit connection to the at least one receiver device via the at least one optical network.

公开(公告)号：US20240419046A1

公开(公告)日：2024-12-19

申请号：US18815345

申请日：2024-08-26

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Zhen Dong ,  Peijie Zhang ,  Yanbo Li

IPC: G02F1/21 ,  G02F1/225 ,  H04B10/516

Abstract: A Mach-Zehnder (MZ) modulator includes a splitter, two modulation arms, and a coupler. The two modulation arms include two optical transmission waveguides and two electrodes. The splitter is configured to perform power splitting on an optical carrier to obtain two optical carriers and input the two optical carriers to corresponding input ports of the two optical transmission waveguides, respectively. The two electrodes include a first electrode and a second electrode which are respectively configured to receive two differential electrical signals and apply the two differential electrical signals to the two optical transmission waveguides to change phases of the two optical carriers. Two input ends of the coupler are connected to output ports of the two optical transmission waveguides, respectively, and are configured to perform interference on the optical carriers whose phases are changed via the two modulation arms and output the optical carriers.

公开(公告)号：US12169347B2

公开(公告)日：2024-12-17

申请号：US17641022

申请日：2019-09-12

Applicant: Nippon Telegraph and Telephone Corporation

Inventor： Josuke Ozaki ,  Yoshihiro Ogiso ,  Yasuaki Hashizume

IPC: G02F1/225 ,  G02F1/21 ,  H04B10/516

Abstract: A semiconductor Mach-Zehnder optical modulator includes input-side lead-out lines, phase modulation electrode lines, and electrodes that apply modulation signals propagating through the phase modulation electrode lines to waveguides, respectively. The semiconductor Mach-Zehnder optical modulator further includes a conductive layer between a substrate and the waveguides, a plurality of first wiring layers connected to the conductive layer, and a second wiring layer that connects an electrode pad and the plurality of first wiring layers.

公开(公告)号：US20240405880A1

公开(公告)日：2024-12-05

申请号：US18328027

申请日：2023-06-02

Applicant: CIENA CORPORATION

Inventor： Shahab Oveis Gharan ,  Yves Beaulieu ,  Douglas McGhan ,  Kim Byron Roberts

IPC: H04B10/516

Abstract: Aspects of the subject disclosure may include, for example, obtaining two inputs xI and xQ based on a digital input signal, and causing a modulator to create two substantially orthogonal output dimensions I and Q based on the two inputs xI and xQ, by performing controlled introduction of a correlation between the two inputs xI and xQ for the modulator, and detecting a resulting output power of the modulator to facilitate operation of the modulator. Other embodiments are disclosed.