公开(公告)号：US20240275490A1

公开(公告)日：2024-08-15

申请号：US18437607

申请日：2024-02-09

Applicant: Applied Optoelectronics, Inc.

Inventor： Rafael CELEDON ,  Yi WANG ,  Tina MATHEWS ,  Ruru CHEN ,  Mark SIEJKA ,  Hang XIE ,  Ramesh NALLUR

IPC: H04B10/2575 ,  H04B10/25

CPC classification number: H04B10/25751 ,  H04B10/2589

Abstract: Low data rate, low power, bi-directional transmissions may be provided over existing physical communication media (e.g., coaxial cables and/or optical fiber) and in the presence of higher bandwidth, higher power primary signals currently being transmitted over the communication media. The low data rate, low power, bi-directional transmissions may be accomplished using spread-spectrum modulated signals that are positioned in frequency relative to the primary signals, such that the low data rate, low power transmissions occur without detectable interference with the primary signals, which include multiplexed narrowband modulated signals. In some embodiments, the primary signals may be modulated using quadrature amplitude modulation (QAM) and multiplexed using orthogonal frequency division multiplexing (OFDM) and the spread-spectrum modulated signals may be chirp spread spectrum (CSS) modulated signals modulated using Gaussian frequency shift keying (GFSK). One example of the spread-spectrum modulated signals is implemented using LoRa technology and communication protocols defined by the LoRaWAN standard.

公开(公告)号：US20180109319A1

公开(公告)日：2018-04-19

申请号：US15295189

申请日：2016-10-17

Applicant: Applied Optoelectronics, Inc.

Inventor： Michael JONES ,  Rafael CELEDON

IPC: H04B10/2575 ,  H04B10/564 ,  H04B17/00

CPC classification number: H04B10/25751 ,  H04B10/564 ,  H04B10/6931

Abstract: Energy reduction in a CATV network device, such as an optical node, in a CATV network may be accomplished using a system and method for controlling an amplifier in response to channel loading. The system and method detects a channel loading condition for a CATV RF signal including a plurality of utilized channels across a channel spectrum defining a plurality of potential channels. The channel loading condition may be detected by scanning the CATV RF signal to measure the channel loading or by obtaining channel loading data from a remote PHY device (RPD) located in the optical node. The system and method then obtains an amplifier operating parameter associated with the channel loading condition and applies the amplifier operating parameter to control power consumption of an amplifier in the optical node (e.g., by changing bias current) in response to the channel loading condition.

公开(公告)号：US20240275426A1

公开(公告)日：2024-08-15

申请号：US18437594

申请日：2024-02-09

Applicant: Applied Optoelectronics, Inc.

Inventor： Rafael CELEDON ,  Yi WANG ,  Tina MATHEWS ,  Ruru CHEN ,  Mark SIEJKA ,  Hang XIE ,  Ramesh NALLUR

IPC: H04B1/69 ,  H04L12/28

CPC classification number: H04B1/69 ,  H04L12/2801 ,  H04B2001/6912

Abstract: Low data rate, low power, bi-directional transmissions may be provided over existing physical communication media (e.g., coaxial cables and/or optical fiber) and in the presence of higher bandwidth, higher power primary signals currently being transmitted over the communication media. The low data rate, low power, bi-directional transmissions may be accomplished using spread-spectrum modulated signals that are positioned in frequency relative to the primary signals, such that the low data rate, low power transmissions occur without detectable interference with the primary signals, which include multiplexed narrowband modulated signals. In some embodiments, the primary signals may be modulated using quadrature amplitude modulation (QAM) and multiplexed using orthogonal frequency division multiplexing (OFDM) and the spread-spectrum modulated signals may be chirp spread spectrum (CSS) modulated signals modulated using Gaussian frequency shift keying (GFSK). One example of the spread-spectrum modulated signals is implemented using LoRa technology and communication protocols defined by the LoRaWAN standard.

公开(公告)号：US20230118298A1

公开(公告)日：2023-04-20

申请号：US17962129

申请日：2022-10-07

Applicant: Applied Optoelectronics, Inc.

Inventor： George GONCALVES ,  Rafael CELEDON ,  Mark SIEJKA

IPC: H04N21/438 ,  H04N21/414 ,  H04N21/236

Abstract: A broadband digital access (BDA) architecture includes a BDA hub device in a headend/hub and one or more BDA node modules in one or more HFC nodes to enable digital communications between the headend/hub and the HFC node(s) in a CATV/HFC network. The BDA hub device and the BDA node module(s) are connected by one or more downstream optical fibers and one or more upstream optical fibers to enable digital optical communications therebetween. The BDA hub device provides an analog RF interface with equipment in the headend/hub and the BDA node module provides an analog RF interface with subscriber locations via one or more coaxial cables.

公开(公告)号：US20250047518A1

公开(公告)日：2025-02-06

申请号：US18792054

申请日：2024-08-01

Applicant: Applied Optoelectronics, Inc.

Inventor： Rafael CELEDON ,  Yi WANG ,  Tina MATHEWS ,  Ruru CHEN ,  Mark SIEJKA ,  Hang XIE ,  Ramesh NALLUR ,  Stefan MURRY ,  David STEWART

IPC: H04L12/28 ,  H04B1/69

Abstract: Low data rate, low power, bi-directional transmissions may be provided over existing physical communication media (e.g., coaxial cables) using a portable network communications module and in the presence of higher bandwidth, higher power primary signals currently being transmitted over the communication media. The low data rate, low power, bi-directional transmissions may be accomplished using spread-spectrum modulated signals that are positioned in frequency relative to the primary signals, such that the low data rate, low power transmissions occur without detectable interference with the primary signals, which include multiplexed narrowband modulated signals. The primary signals may be modulated using quadrature amplitude modulation (QAM) and multiplexed using orthogonal frequency division multiplexing (OFDM) and the spread-spectrum modulated signals may be chirp spread spectrum (CSS) modulated signals modulated using Gaussian frequency shift keying (GFSK). One example of the spread-spectrum modulated signals is implemented using LoRa technology and communication protocols defined by the LoRaWAN standard.

公开(公告)号：US20230006402A1

公开(公告)日：2023-01-05

申请号：US17366851

申请日：2021-07-02

Applicant: Applied Optoelectronics, Inc.

Inventor： William G. MAHONEY ,  Rafael CELEDON ,  Simon FARFOUD

IPC: H01R24/40 ,  H03F3/19

Abstract: The present disclosure is generally directed to a connector assembly that includes an increased outer diameter of the connector member relative to the equivalent G-type connector and an increased inner diameter of the receptable member relative to the equivalent G-type receptacle (also referred to as a seizure nut) to achieve higher current carrying capacity and target frequency rates of up to 3.0 Ghz, for example. In one preferred example, this results in a connector assembly consistent with the present disclosure having a connector member with an outer diameter of at least 10.70 mm, and more preferably 10.76±0.01 mm, rather than the 9.4 mm diameter of existing G-type connectors. Despite this increased diameter, a seizure assembly consistent with the present disclosure can achieve a functional impedance of 75 ohms to maintain nominal signal quality.

公开(公告)号：US20180092199A1

公开(公告)日：2018-03-29

申请号：US15275785

申请日：2016-09-26

Applicant: Applied Optoelectronics, Inc.

Inventor： Rafael CELEDON ,  Mark SIEJKA ,  Michael JONES

IPC: H05K1/02 ,  H05K1/18 ,  G02B6/42

CPC classification number: H05K1/0204 ,  G02B6/4272 ,  G02B6/428 ,  G02B6/4292 ,  H05K1/18 ,  H05K3/0061 ,  H05K2201/10121 ,  H05K2201/10416

Abstract: A heat transfer assembly may be used to provide a thermal conduit from a module mounted on a circuit board through the circuit board, allowing a thermal path away from the module. The heat transfer assembly generally includes a thermally conductive base with at least one raised thermal pedestal accessible through at least one heat transfer aperture in the circuit board and in thermal contact with the module. In an embodiment, the heat transfer assembly is used in a remote PHY device (RPD) in an optical node, for example, in a CATV/HFC network. The RPD includes an enclosure having a base with at least one raised thermal pedestal in thermal contact with an optical module (e.g., an optical transmitter or transceiver) on a circuit board through at least one heat transfer aperture in the circuit board.