公开(公告)号：US20250167828A1

公开(公告)日：2025-05-22

申请号：US18924107

申请日：2024-10-23

Applicant: Applied Optoelectronics, Inc.

Inventor： Yi WANG ,  Ramesh NALLUR ,  Rafael CELEDON

IPC: H04B3/06 ,  H04H20/78

Abstract: The present disclosure provides an RF line extender amplifier in a hybrid fiber-coaxial (HFC) network, the RF line extender amplifier including: RF amplifier circuitry; a service port communicatively coupled with the RF amplifier circuitry; and a wireless adapter communicatively coupled with the RF amplifier circuitry via the service port, the wireless adapter configured to communicatively couple with a user device to allow for wireless maintenance of the RF line extender amplifier.

公开(公告)号：US20250120025A1

公开(公告)日：2025-04-10

申请号：US18377165

申请日：2023-10-05

Applicant: Applied Optoelectronics, Inc.

Inventor： William G. MAHONEY ,  Brendan STRINGER

IPC: H05K5/02 ,  H05K5/03

Abstract: A hinged housing with a hinge retention mechanism may be used to house electronic equipment such as an RF amplifier in a hybrid fiber-coaxial (HFC) network delivering CATV services to subscriber locations. The hinged housing includes housing portions that may be separated by uncoupling hinge members forming one or more hinges, for example, to replace or repair the electronic equipment. The hinge retention mechanism prevents inadvertent uncoupling of the hinge members and separation of the housing portions. The hinge retention mechanism is retractable and push-activated to allow the hinge members to uncouple while the retention mechanism remains secured to one of the housing portions. In one embodiment, the retention mechanism may be provided on a replacement lid assembly of an electronic equipment housing (e.g., an RF amplifier housing), which is designed to replace a lid assembly on an existing housing in the field.

公开(公告)号：US12136796B2

公开(公告)日：2024-11-05

申请号：US17405416

申请日：2021-08-18

Applicant: Applied Optoelectronics, Inc.

Inventor： Dapeng Xu ,  Jin Huang ,  Huanlin Zhang

IPC: H01S3/10 ,  H01S5/026 ,  H01S5/065 ,  H01S5/12 ,  H01S5/20 ,  H01S5/22 ,  H01S5/343 ,  H01S5/028

Abstract: The present disclosure is generally directed to an EML with a filter layer disposed between an active region of the EML and a substrate of the EML to absorb a portion of unmodulated light energy, and preferably the unmodulated light energy caused by transverse electric (TE) substrate mode. The filter layer preferably comprises a material with an energy band gap (Eg) that is less than the energy band gap of the predetermined channel wavelength to absorb unmodulated laser light.

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：US20240080110A1

公开(公告)日：2024-03-07

申请号：US17901282

申请日：2022-09-01

Applicant: Applied Optoelectronics, Inc.

Inventor： Steven BLASHEWSKI

IPC: H04B17/00

CPC classification number: H04B17/0085

Abstract: A forward and reverse test point circuit with a switchable termination may be used to provide testing of forward and reverse RF signals in an RF amplifier before and/or after amplification. The switchable forward and reverse test point circuit includes at least one switchable termination circuit coupled between forward and reverse terminals of a directional coupler and at least one test point. During forward signal testing, the forward terminal is switched to the at least one test point and the reverse terminal is switched to a termination. During reverse signal testing, the reverse terminal is switched to the at least one test point and the forward terminal is switched to a termination. The RF amplifier including the switchable forward and reverse test point circuit may be used in a hybrid fiber-coaxial (HFC) network delivering CATV services and may be capable of amplifying RF signals up to 1.8 GHz.

公开(公告)号：US11474311B1

公开(公告)日：2022-10-18

申请号：US17331911

申请日：2021-05-27

Applicant: Applied Optoelectronics, Inc.

Inventor： Kai-Sheng Lin ,  Hao-Chiang Cheng ,  Ziliang Cai

IPC: G02B6/42 ,  H04J14/02 ,  H04B10/40

Abstract: A parabolic reflector device (also referred to herein as a parabolic lens device) is disclosed which includes a plurality of parabolic lens members and a mirror member which couple together and collectively provide a light-transmissive structure for multiplexing or demultiplexing of an optical signal. The parabolic reflector device can be implemented within optical subassembly modules to support operations of transmitter optical subassemblies (TOSAs) and/or receiver optical subassemblies (ROSAs).

公开(公告)号：US11320601B2

公开(公告)日：2022-05-03

申请号：US17031392

申请日：2020-09-24

Applicant: Applied Optoelectronics, Inc.

Inventor： Kai-Sheng Lin ,  John Cheng ,  Ziliang Cai

IPC: G02B6/38 ,  H04B10/40 ,  G02B6/42

Abstract: In general, the present disclosure is directed to locking arrangements for use with optical subassembly housings, such as small form-factor pluggable (SFFP) housings, that include a handle member configured to rotate about the housing to allow a user to select a target/desired orientation. Preferably, the locking arrangement couples to a pluggable housing that is configured to removably couple into a receptacle of an optical transceiver cage or other suitable enclosure. The locking arrangement further includes a handle member rotatably coupled to the pluggable housing, the handle member being configured to allow the pluggable housing to releasably lock within the receptacle. The handle member is also preferably configured to maintain a user-selected orientation such that the handle member remains at a given angle relative to the pluggable housing in the absence of a user-supplied force.

公开(公告)号：US20220091350A1

公开(公告)日：2022-03-24

申请号：US17031362

申请日：2020-09-24

Applicant: Applied Optoelectronics, Inc.

Inventor： Kai-Sheng LIN ,  John CHENG ,  Ziliang CAI

IPC: G02B6/42 ,  H01R13/66 ,  H01R13/629

Abstract: In general, the present disclosure is directed to locking arrangements for use with optical subassembly housings, such as small form-factor pluggable (SFFP) housings, that include a handle member configured to rotate about the housing to allow a user to select a target/desired orientation. Preferably, the locking arrangement couples to a pluggable housing that is configured to removably couple into a receptacle of an optical transceiver cage or other suitable enclosure. The locking arrangement further includes a handle member rotatably coupled to the pluggable housing, the handle member being configured to allow the pluggable housing to releasably lock within the receptacle. The handle member is also preferably configured to maintain a user-selected orientation such that the handle member remains at a given angle relative to the pluggable housing in the absence of a user-supplied force.

公开(公告)号：US20210159666A1

公开(公告)日：2021-05-27

申请号：US16693365

申请日：2019-11-24

Applicant: Applied Optoelectronics, Inc.

Inventor： Kai-Sheng LIN ,  Hang XIE ,  Ming QI

IPC: H01S5/024 ,  H01S5/022

Abstract: In general, a temperature control device for use in laser assemblies and optical subassemblies is disclosed that includes at least two electrically conductive terminals to enable flexible electrical coupling to associated components, e.g., monitor photodiodes and laser diodes, and accommodate a range of laser assembly configurations without the necessity of supplying a negative voltage rail. In more detail, a temperature control device consistent with the present disclosure includes a bottom plate, a top plate, and a plurality of semiconductor elements disposed therebetween. The top plate includes a component mounting surface that provides at least a first and second electrically conductive terminal/pad. The first and second electrically conductive terminals/pads can be electrically isolated, e.g., via a gap, and configured to provide first and second voltage potentials respectively.

公开(公告)号：US10989870B2

公开(公告)日：2021-04-27

申请号：US16116087

申请日：2018-08-29

Applicant: Applied Optoelectronics, Inc.

Inventor： Kai-Sheng Lin ,  Kevin Liu ,  I-Lung Ho

IPC: G02B6/34 ,  G02B6/12 ,  G02B6/42 ,  H04B10/50 ,  H04B10/40 ,  H04J14/02

Abstract: In general, a TOSA consistent with the present disclosure includes a light driving circuit coupled to a hermetically-sealed light engine. The hermetically-sealed light engine includes a housing defined by a plurality of sidewalls. The housing defines a cavity that is hermetically-sealed to prevent introduction of contaminants that would otherwise reduce optical power. The hermetically-sealed light engine optically couples to an external arrayed waveguide grating (AWG), or other multiplexing device, by way of an optical receptacle. The optical receptacle can include a waveguide implemented external to the hermetically-sealed cavity and can include, for instance, an optical isolator, fiber stub, and fiber ferrule section. Thus, the external AWG and associated external optical coupling components advantageously allow for the hermetically-sealed light engine to have a cavity with dimensions relatively smaller than other approaches that dispose an AWG and associated components within a hermetically-sealed cavity.