公开(公告)号：US20210211199A1

公开(公告)日：2021-07-08

申请号：US16737438

申请日：2020-01-08

Applicant: Applied Optoelectronics, Inc.

Inventor： Kai-Sheng LIN ,  Hang XIE ,  Yi WANG

IPC: H04B10/40 ,  H01L23/52 ,  H04B10/50 ,  H04B10/80

Abstract: The present disclosure is generally directed to a stepped profile for substrates that support “on board” optical subassembly arrangements. The stepped profile enables mounting TOSA modules to the substrate in a recessed orientation to reduce the overall distance between terminals of the substrate and associated components of the TOSA, e.g., RF terminals of the substrate and an LDD of the TOSA. In an embodiment, the stepped profile further simplifies mounting and optical alignment of TOSA modules by providing at least one mechanical stop to engage surfaces of the TOSA modules and limit travel by the same along one or more axis.

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：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：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：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：US20210211198A1

公开(公告)日：2021-07-08

申请号：US16737414

申请日：2020-01-08

Applicant: Applied Optoelectronics, Inc.

Inventor： Kai-Sheng LIN ,  Hao-Chiang CHENG ,  Hang XIE

IPC: H04B10/40 ,  G02B6/42 ,  H04B10/50 ,  H04B10/69 ,  H01S5/026 ,  H04B10/67

Abstract: The present disclosure is generally directed to a monitor photodiode (MPD) submount for use in optical transceivers that includes a body with a conductive trace pattern disposed on multiple surfaces of the same to allow for vertical mounting of an associated MPD and simplified electrical interconnection with TOSA circuitry without the necessity of electrical interconnection. The MPD submount includes a body defined by a plurality of sidewalls. At least one surface of the body provides a mounting surface for coupling to and supporting an MPD. The MPD submount further includes a conductive trace pattern that provides at least one conductive path that is disposed on the mounting surface and on at least one adjoining sidewall. The portion of the at least one conductive path disposed on the adjoining sidewall extends substantially transverse relative to the surface defining the transceiver/transmitter substrate when the MPD submount is coupled to the same.