公开(公告)号：US12095511B1

公开(公告)日：2024-09-17

申请号：US17848923

申请日：2022-06-24

Applicant: Rockwell Collins, Inc.

Inventor： Daniel J. Esman ,  Ronald D. Esman ,  Oliver S. King

IPC: H04B10/548

CPC classification number: H04B10/548

Abstract: A system and related method for multiple-sensitivity optical phase modulation splits an optical carrier generated by a photonic source into at least two copies and directs the copies (e.g., via optical circulators or polarization rotators) to an electro-optical (EO) phase modulator such that the phase modulator phase-modulates each optical copy according to a received radio frequency (RF) signal of interest based on characteristics distinct to each optical copy (e.g., optical path direction, signal polarization) that provide for phase modulation of each optical copy at a different sensitivity voltage. The variably modified optical copies are directed to a photonic processor for further signal processing in the optical domain.

公开(公告)号：US20240235604A1

公开(公告)日：2024-07-11

申请号：US18424899

申请日：2024-01-29

Applicant: ELBIT SYSTEMS C4I AND CYBER LTD.

Inventor： Ezra ZAMIR ,  Yizhack YADGAR ,  Shaul Baruch LAUFER

IPC: H04B1/69 ,  H04B10/548

CPC classification number: H04B1/69 ,  H04B10/548

Abstract: A wireless transmitting method comprising: obtaining a first-spread-spectrum-signal (SS1-signal); producing a doubly-spread-spectrum-signal (SS2-signal) from the SS1-signal utilizing a spreading-sequence out of at least one spreading-sequence; modulating the SS2-signal to a Radio-Frequency SS2-signal (RF-SS2-signal); and transmitting the RF-SS2-signal.

公开(公告)号：US20240235479A1

公开(公告)日：2024-07-11

申请号：US17703916

申请日：2022-03-24

Applicant: Phase Sensitive Innovations, Inc.

Inventor： Garrett Schneider ,  Janusz Murakowski

IPC: H03D7/18 ,  H03D7/16 ,  H04B10/548

CPC classification number: H03D7/18 ,  H03D7/165 ,  H04B10/548

Abstract: A photonic image rejection radio frequency (RF) mixer and a receiver implementing the same may suppress undesired mirror image signals having frequencies at a spectral location that is mirror-symmetric, with respect to a local oscillator (LO), to that of a signal of interest. An upconverted optical beam corresponding to a captured RF beam is extracted by an optical processor. The upconverted optical beam is mixed with the LO to obtain a desired composite optical signal and an undesired composite optical signal, each providing a corresponding beat frequency optical signal at the same frequency. The desired and undesired composite optical signals are captured by multiple optical pickups with relative phase shifts in their beat frequency optical signals which are converted into corresponding electrical signals and combined to suppress the undesired signal.

公开(公告)号：US20230318714A1

公开(公告)日：2023-10-05

申请号：US17709975

申请日：2022-03-31

Applicant: Nokia Solutions and Networks Oy

Inventor： Patrick Iannone ,  Roland Ryf ,  Rene-Jean Essiambre

IPC: H04B10/548

CPC classification number: H04B10/548

Abstract: An apparatus includes an optical PSK transmitter configured to output carrier-suppressed optical signal phase-modulated according to a M-PSK constellation without substantial amplitude modulation. The apparatus includes an optical phase modulator, a driver configured to drive the modulator with a PAM-N electrical signal, N>M, and a signal encoder configured to map an input bit stream to the PAM-N electrical signal.

公开(公告)号：US20230318710A1

公开(公告)日：2023-10-05

申请号：US18126663

申请日：2023-03-27

Applicant: INTER-UNIVERSITY RESEARCH INSTITUTE CORPORATION NATIONAL INSTITUTES OF NATURAL SCIENCES

Inventor： Hitoshi KIUCHI

IPC: H04B10/2575 ,  H04B10/548 ,  H04B10/67 ,  H04B10/50

CPC classification number: H04B10/25753 ,  H04B10/548 ,  H04B10/676 ,  H04B10/50597 ,  H04B10/50577

Abstract: A forward optical intensity modulation signal, generated by optical intensity-modulating a laser signal using a forward microwave phase modulation signal, is transmitted from a base to a remote station. A backward microwave phase modulation signal, in which frequency of the forward microwave phase modulation signal is changed by demodulating the forward optical intensity modulation signal, is generated, and a backward optical intensity modulation signal, generated by optical intensity-modulating the laser signal using the backward microwave phase modulation signal, is transmitted from the remote station to the base. The backward microwave phase modulation signal is extracted by photoelectric converting the backward optical intensity modulation signal, a round trip timing is extracted by demodulating the backward microwave phase modulation signal, and transmission delay is determined from a difference between the timing and the round trip timing.

公开(公告)号：US20230283375A1

公开(公告)日：2023-09-07

申请号：US18081789

申请日：2022-12-15

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Minhyup SONG ,  Hyun Jong CHOI ,  Minje SONG ,  Gyu Dong CHOI ,  Taehyun LEE ,  SEUNGYOUNG LIM

IPC: H04B10/2575 ,  H04B10/548

CPC classification number: H04B10/2575 ,  H04B10/548

Abstract: Disclosed are a photonic multiband filter and a method of operating the same. The photonic multiband filter includes an optical frequency comb that forms multiple optical channels based on a single light source incident from an outside, a modulator that applies an RF signal modulated into an optical domain among a plurality of RF signals to the multiple optical channels, and a pulse shaper that determines a center frequency, a bandwidth, and a passband shape of the RF signal modulated into the optical domain including the multiple optical channels.

公开(公告)号：US11716209B2

公开(公告)日：2023-08-01

申请号：US17230892

申请日：2021-04-14

Applicant: The Regents of the University of Colorado

Inventor： Rafael Piestun ,  Haiyan Wang

IPC: H04B10/548 ,  H04L9/38 ,  G02B27/42

CPC classification number: H04L9/38 ,  G02B27/4233 ,  H04B10/548

Abstract: Systems and methods for azimuthal multiplexing using three-dimensional diffractive optics An azimuthal optical multiplexing system includes a light source. The system includes two or more at least partially transparent plates. Each plate of the two or more plates has a structured or patterned surface positioned in an optical path of the light source. The system includes means for rotating at least one plate of the two or more plates axially with respect to at least one other plate of the two or more plates. The means for rotating is operatively coupled to the at least one plate. The structured or patterned surface is configured to modulate light directed along the optical path and through the two or more plates.

公开(公告)号：US11689292B2

公开(公告)日：2023-06-27

申请号：US17228122

申请日：2021-04-12

Applicant: Google LLC

Inventor： Xiang Zhou ,  Cedric F. Lam ,  Ryohei Urata ,  Hong Liu

IPC: H04B10/60 ,  H04B10/532 ,  H04B10/548 ,  H04B10/61 ,  H04B10/40 ,  H04J14/06

CPC classification number: H04B10/532 ,  H04B10/548 ,  H04B10/40 ,  H04B10/60 ,  H04B10/61 ,  H04B10/614 ,  H04J14/06

Abstract: Coherent optical communications technology for recovery of 1D and 2D formatted optical signals. For example, 1D or 2D formatted signals that travel through fiber optic media may be recovered by separating the light into X- and Y-polarization components, rotating one polarization component (e.g., Y-component) into the polarization space of the other component (e.g., Y-component into the X-polarization space), delaying the rotated component enough to avoid destructive interference and combining the delayed component with the undelayed component to form a folded optical signal, which may then be processed as a X-polarized signal.

公开(公告)号：US20190199443A1

公开(公告)日：2019-06-27

申请号：US16293324

申请日：2019-03-05

Applicant: Huawei Technologies Co., Ltd.

Inventor： Mahdi Zamani ,  Jeebak Mitra ,  Hossein Najafi ,  Zhuhong Zhang ,  Chuandong Li

IPC: H04B10/61

CPC classification number: H04B10/616 ,  H04B10/548 ,  H04B10/5561 ,  H04B10/613 ,  H04B10/614

Abstract: Aspects of the present disclosure are directed in part to a receiver DSP unit including an equalization module. The equalization module includes a trellis-based equalization module that may utilize multiple trellis-based processors (TBP), which can each be individually adaptively configured for performing a trellis-based equalization. The design of the TBPs allows them to be configured for compensating a residual Inter-Symbol Interference (ISI) as well as compensating a residual Phase Noise (PN). ISI is an example of an additive impairment and PN is an example of a multiplicative impairment that communication systems, particularly high speed transmission systems such as coherent optical systems, can suffer from.

公开(公告)号：US20190190708A1

公开(公告)日：2019-06-20

申请号：US16330163

申请日：2017-09-05

Applicant: Kets Quantum Security LTD

Inventor： Philip Sibson

IPC: H04L9/08 ,  H04B10/70 ,  H04B10/548

CPC classification number: H04L9/0852 ,  H04B10/548 ,  H04B10/70

Abstract: There is presented optical interferometer apparatus for generating at least a first and a second state for each of at least two different quantum cryptographic basis sets and associated methods for operating the apparatus. First and a second interferometer arm paths and at least two interferometer output paths are provided. Each of the first and second interferometer arm paths; and the first and second optical output paths comprises a controllable phase modulator for controllably changing the phase of light propagating along the respective paths. This maybe a silicon carrier depletion phase modulator. The output from the controllable phase modulators of the first and second optical output paths are used together for defining each of the first and second states for each respective basis set. In some examples at least one of the interferometer arm paths comprises a further controllable phase modulator such as a thermo-optic phase modulator.