公开(公告)号：US20230299856A1

公开(公告)日：2023-09-21

申请号：US17694866

申请日：2022-03-15

申请人： HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP

发明人： David Ritter Thomas ,  Laurel Abeyta ,  Jason Douglas Jung ,  Kit MacCarthy Morton ,  Daniel Alan Berkram

IPC分类号： H04B10/69

CPC分类号： H04B10/697 ,  H04B10/691

摘要： Examples described herein relate to a method and a system for removing the common-mode current. The receiver includes a photodetector, a common-mode adjustment circuit, an analog front-end, an eye scan circuit, and a control unit. The photodetector generates an input photocurrent responsive to a received optical signal. The common-mode adjustment circuit generates an adjusted input current based on the input photocurrent. The analog front-end generates a differential voltage based on the adjusted input current. Based on the differential voltage, the eye scan circuit generates an eye scan information defining a first outer eye and a second outer eye in an eye diagram. The control unit tunes the common-mode adjustment circuit based on a relative height metric of a first height of the first outer eye and a second height of the second outer eye to remove a portion of the common-mode current from the input photocurrent.

公开(公告)号：US20230231632A1

公开(公告)日：2023-07-20

申请号：US18077829

申请日：2022-12-08

申请人： FUJITSU OPTICAL COMPONENTS LIMITED

发明人： Koji OTSUBO ,  Kazumasa TAKABAYASHI ,  Masaki SUGIYAMA ,  Shuntaro MAKINO

IPC分类号： H04B10/69 ,  H04B10/50 ,  H04B10/516

CPC分类号： H04B10/69 ,  H04B10/503 ,  H04B10/5161 ,  H01S5/50

摘要： An optical device includes an optical coupler that inputs an optical signal received from a light source, a semiconductor optical amplifier that amplifies the optical signal received from the optical coupler, and a light receiving element that receives spontaneous emission light received from the semiconductor optical amplifier. The optical coupler includes a first input port to which the optical signal received from the light source is input, a second input port that is connected to an input stage of the light receiving element and that is different from the first input, and an output port that is connected to an input stage of the semiconductor optical amplifier, and that outputs optical signal received from the first input port to the semiconductor optical amplifier. The light receiving element receives, via the output port and the second input port, spontaneous emission light received from the semiconductor optical amplifier.

公开(公告)号：US20230197758A1

公开(公告)日：2023-06-22

申请号：US18169654

申请日：2023-02-15

申请人： ARTILUX, INC.

发明人： YUN-CHUNG NA

IPC分类号： H01L27/146 ,  H01L31/113 ,  H04B10/69

CPC分类号： H01L27/14643 ,  H01L31/113 ,  H04B10/691

摘要： A photodetecting device includes a substrate, an array of sub-pixels, and a lens array covering the array of sub-pixels. Each sub-pixel includes a photosensitive layer supported by the substrate, the photosensitive layer being configured to absorb photons and generate photo-carriers, a first doped portion formed in the photosensitive layer of the respective sub-pixel, wherein the first doped portion includes dopants with a first conductivity type,; and a second doped portion formed in the substrate, wherein the second doped portion includes dopants with a second conductivity type different from the first conductivity type. The array further includes an isolation region separating two or more sub-pixels of the array, a routing layer formed on the substrate configured to electrically couple a circuit to multiple sub-pixels of the array. The lens array includes a spacer portion and a plurality of lenses arranged in a one-to-one correspondence with each of the sub-pixels.

公开(公告)号：US20230163858A1

公开(公告)日：2023-05-25

申请号：US17456137

申请日：2021-11-22

申请人： Alpine Optoelectronics, Inc.

发明人： Xingyu Zhang ,  Tongqing Wang

IPC分类号： H04B10/69 ,  G02B6/12 ,  H04B10/079

CPC分类号： H04B10/693 ,  G02B6/12004 ,  G02B6/12007 ,  H04B10/07953 ,  G02B6/29355

摘要： An integrated receiver chip comprising: a first end and a second end; at least one optical input port disposed at the first end; a polarization manipulation device optically connected to one of the at least one optical input port, the polarization manipulation device being adapted to split an optical signal into a first and a second optical signals; a first and a second dispersion compensators each optically connected to the polarization manipulation device, the first and the second dispersion compensators each being adapted to selectively induce a dispersion on an optical signal propagating through the dispersion compensator; and a first and a second photodetectors optically connected to the first and the second dispersion compensators, respectively.

公开(公告)号：US11646916B2

公开(公告)日：2023-05-09

申请号：US17301782

申请日：2021-04-14

申请人： CREDO TECHNOLOGY GROUP LTD

发明人： Junqing (Phil) Sun

IPC分类号： H04L25/03 ,  H04B10/69 ,  H04L27/01 ,  H04B14/02 ,  H04L25/02 ,  H04B3/04 ,  H03K5/08

CPC分类号： H04L25/03057 ,  H03K5/082 ,  H04B3/04 ,  H04B10/6971 ,  H04B14/023 ,  H04B14/026 ,  H04L25/0214 ,  H04L27/01

摘要： An illustrative receiver includes: a decision element that derives symbol decisions from a slicer input signal; an equalizer that converts a receive signal into the slicer input signal; a summer that combines the symbol decisions with the slicer input signal to produce an error signal; and a level finder that operates on said signals to determine thresholds at which each signal has a given probability of exceeding the threshold. One illustrative level finder circuit includes: a gated comparator and an asymmetric accumulator. The gated comparator asserts a first or a second gated output signal to indicate when an input signal exceeds or falls below a threshold with a programmable condition being met. The asymmetric accumulator adapts the threshold using up steps for assertions of the first gated output signal and down steps for assertions of the second gated output signal, with the up-step size being different than the down-step size.

公开(公告)号：US20230127342A1

公开(公告)日：2023-04-27

申请号：US17510369

申请日：2021-10-25

申请人： City University of Hong Kong

发明人： Martin GARAJ ,  Shu Hung Henry CHUNG

IPC分类号： H04Q11/00 ,  H04B10/524 ,  H04B10/69 ,  H04B10/11

摘要： The present invention provides an apparatus for facilitating a photovoltaic device to provide a wireless communication channel. The apparatus comprises a switch connected in parallel with the photovoltaic device and configured for driving the photovoltaic device to produce optical signals carrying sensed data to be transmitted; and a control module connected with the switch and configured for receiving electrical sensing signals and generate a control signal to control the switch. The apparatus provided by the present invention is extremely durable. Compared to existing communication technologies which require extra hardware, the apparatus provided by the present invention is simpler and can be integrated into a single component.

公开(公告)号：US11630799B2

公开(公告)日：2023-04-18

申请号：US17751212

申请日：2022-05-23

申请人： Marvell Asia Pte Ltd.

发明人： Radhakrishnan L. Nagarajan ,  Chao Xu

IPC分类号： G06F15/78 ,  G06F13/42 ,  G02B6/12 ,  H04B10/80 ,  H04B10/40 ,  H04B10/69 ,  H04L27/00 ,  G06F13/364 ,  G06F13/40 ,  H04L1/00 ,  H04L25/03 ,  H04L5/14 ,  H04L27/02 ,  H04L27/18 ,  H04L27/34

摘要： A hybrid electrical and optic system-on-chip (SOC) device configured for both electrical and optic communication includes a substrate, an electrical device configured for electrical communication arranged on the substrate, a photonics device configured for optic communication arranged on the substrate, and a self-test module arranged on the substrate. The self-test module is configured to receive a loop-back signal indicative of an optical signal output from the photonics device and calibrate the photonics device based on the loop-back signal.

公开(公告)号：US11614804B2

公开(公告)日：2023-03-28

申请号：US17147959

申请日：2021-01-13

申请人： Samsung Electronics Co., Ltd.

发明人： Oleksandr Sapozhnik ,  Iegor Vdovychenko ,  Andrii Bugaiov

IPC分类号： G06F3/01 ,  H04B10/90 ,  H04B10/69 ,  H04B10/50 ,  H04B1/709 ,  G01R33/02 ,  G01R33/24

摘要： An electronic device is provided. The electronic device includes a memory and at least one processor functionally connected with the memory, wherein the at least one processor may be configured to generate a first signal by modulating a phase of a default signal using a first code corresponding to a first magnetic field generator connected with the electronic device, control the first magnetic field generator connected with the electronic device to radiate a magnetic field corresponding to the first signal, receive a signal from at least one sensor connected with the electronic device, identify a second signal corresponding to the first signal from the signal, using the first code, and determine at least one of a position or a direction of the at least one sensor based on the second signal.

公开(公告)号：US11609116B2

公开(公告)日：2023-03-21

申请号：US17446142

申请日：2021-08-26

申请人： Banner Engineering Corp.

发明人： Ashley Wise ,  Tim Dirks

IPC分类号： G01J1/44 ,  G01S7/489 ,  H04B10/69

摘要： Apparatus and associated methods relate to an open-loop control circuit (OLCC) configured to determine a photodiode element (PDE) drive voltage as a function of a commanded photodiode gain level and a measured temperature signal. In an illustrative example the OLCC may receive a current temperature of an APD element. The OLCC may, for example, receive a commanded gain for the APD relative to a predetermined reference gain. The OLCC may, for example, retrieve a predetermined efficiency characteristic (PEC) of the APD based on the current temperature. If the temperature corresponds to a substantially non-linear portion of the PEC, the OLCC may, for example, determine the drive voltage as a function of the temperature and the commanded gain based on the PEC. Various embodiments may advantageously provide direct control of output gain of photodiodes over a wide dynamic range of temperature associated with the photodiode.

公开(公告)号：US20230061657A1

公开(公告)日：2023-03-02

申请号：US17561858

申请日：2021-12-24

申请人： Infinera Corporation

发明人： Jeffrey T. Rahn ,  Kuang-Tsan Wu ,  Steven J. Hand ,  David F. Welch

IPC分类号： H04B7/26 ,  H04B10/50 ,  H04B10/548 ,  H04B10/61 ,  H04B10/69 ,  H04J14/02 ,  H04L1/00 ,  H04L5/00 ,  H04J14/08 ,  H04J14/00 ,  H04B10/077 ,  H04B10/079 ,  H04B10/25 ,  H04B10/40 ,  H04Q11/00 ,  H04B10/2575 ,  H04J99/00

摘要： A network or system in which a hub or primary node may communicate with a plurality of leaf or secondary nodes. The hub node may operate or have a capacity greater than that of the leaf nodes. Accordingly, relatively inexpensive leaf nodes may be deployed to receive data carrying optical signals from, and supply data carrying optical signals to, the hub node. One or more connections may couple each leaf node to the hub node, whereby each connection may include one or more spans or segments of optical fibers, optical amplifiers, optical splitters/combiners, and optical add/drop multiplexer, for example. Optical subcarriers may be transmitted over such connections, each carrying a data stream. The subcarriers may be generated by a combination of a laser and a modulator, such that multiple lasers and modulators are not required, and costs may be reduced. As the bandwidth or capacity requirements of the leaf nodes change, the number of subcarriers, and thus the amount of data provided to each node, may be changed accordingly. Each subcarrier within a dedicated group of subcarriers may carry OAM or control channel information to a corresponding leaf node, and such information may be used by the leaf node to configure the leaf node to have a desired bandwidth or capacity.