公开(公告)号：US10367664B2

公开(公告)日：2019-07-30

申请号：US15596034

申请日：2017-05-16

Applicant: Luxtera, Inc.

Inventor： Brian Welch ,  Daniel Kucharski

IPC: G02B6/42 ,  H04B10/50 ,  H04B10/60 ,  H04B10/69 ,  H04L25/02 ,  H04L25/06 ,  H04B10/516 ,  H04B10/564

Abstract: Methods and systems for split voltage domain transmitter circuits are disclosed and may include a two-branch output stage including a plurality of CMOS transistors, each branch of the two-branch output stage comprising two stacked CMOS inverter pairs from among the plurality of CMOS transistors; the two stacked CMOS inverter pairs of a given branch being configured to drive a respective load, in phase opposition to the other branch; and a pre-driver circuit configured to receive a differential modulating signal and output, to respective inputs of the two stacked CMOS inverters, two synchronous differential voltage drive signals having a swing of half the supply voltage and being DC-shifted by half of the supply voltage with respect to each other. The load may include a series of diodes that are driven in differential mode via the drive signals. An optical signal may be modulated via the diodes.

公开(公告)号：US10243674B2

公开(公告)日：2019-03-26

申请号：US15977835

申请日：2018-05-11

Applicant: Luxtera, Inc.

Inventor： Brian Welch ,  Gianlorenzo Masini

IPC: H03F3/08 ,  H03G3/30 ,  H03H21/00 ,  H04B10/69 ,  H04B10/80

Abstract: Methods and systems for a distributed optoelectronic receiver are disclosed and may include an optoelectronic receiver having a grating coupler, a splitter, a plurality of photodiodes, and a plurality of transimpedance amplifiers (TIAs). The receiver receives a modulated optical signal utilizing the grating coupler, splits the received signal into a plurality of optical signals, generates a plurality of electrical signals from the plurality of optical signals utilizing the plurality of photodiodes, communicates the plurality of electrical signals to the plurality of TIAs, amplifies the plurality of electrical signals utilizing the plurality of TIAs, and generates an output electrical signal from coupled outputs of the plurality of TIAs. Each TIA may be configured to amplify signals in a different frequency range. One of the plurality of electrical signals may be DC coupled to a low frequency TIA of the plurality of TIAs.

公开(公告)号：US20180156973A1

公开(公告)日：2018-06-07

申请号：US15830467

申请日：2017-12-04

Applicant: Luxtera, Inc.

Inventor： Brian Welch ,  Attila Mekis ,  Steffan Gloeckner

IPC: G02B6/12 ,  G02B6/124 ,  G02B6/125 ,  H04B10/40 ,  H04B10/80 ,  H04J14/02 ,  G02B6/293

CPC classification number: G02B6/12004 ,  G02B6/124 ,  G02B6/125 ,  G02B6/29386 ,  G02B6/4213 ,  G02B6/4215 ,  G02B6/4246 ,  G02B2006/12142 ,  H04B10/40 ,  H04B10/801 ,  H04J14/0256

Abstract: Methods and systems for partial integration of wavelength division multiplexing and bi-directional solutions are disclosed and may include, an optical transceiver on a silicon photonics integrated circuit coupled to a planar lightwave circuit (PLC). The silicon photonics integrated circuit may include a first modulator and first light source that operates at a first wavelength and a second modulator and second light source that operates at a second wavelength. The transceiver and PLC are operable to modulate a first continuous wave (CW) optical signal from the first light source utilizing the first modulator and modulate a second CW optical signal from the second light source utilizing the second modulator. The modulated signals may be communicated from the modulators to the PLC utilizing a first pair of grating couplers in the IC and combined in the PLC.

公开(公告)号：US20180109323A9

公开(公告)日：2018-04-19

申请号：US14997935

申请日：2016-01-18

Applicant: Luxtera, Inc.

Inventor： Brian Welch ,  Kevin Xu

IPC: H04B10/516

CPC classification number: H04B10/516 ,  H04B10/5055 ,  H04B10/524 ,  H04B10/541

Abstract: Methods and systems for a distributed optical transmitter with local domain splitting is disclosed and may include, in an optical modulator integrated in a silicon photonics chip: receiving electrical signals, communicating the electrical signals to domain splitters along a length of waveguides of the optical modulator utilizing one or more delay lines, generating electrical signals in voltage domains utilizing the domain splitters, modulating received optical signals in the waveguides of the optical modulator by driving diodes with the electrical signals generated in the voltage domains, and generating a modulated output signal through interference of the modulated optical signal in the waveguides of the optical modulator. The delay lines may comprise one delay element per domain splitter, or may comprise a delay element per domain splitter for a first subset of the domain splitters and more than one delay element per domain splitter for a second subset of the domain splitters.

公开(公告)号：US20170237516A1

公开(公告)日：2017-08-17

申请号：US15585838

申请日：2017-05-03

Applicant: Luxtera, Inc.

Inventor： Brian Welch

IPC: H04J14/02 ,  H04B10/516 ,  H04B10/50 ,  H04B10/25 ,  H04B10/40

CPC classification number: H04J14/02 ,  G02B6/12007 ,  G02B6/30 ,  G02B6/34 ,  G02B6/4215 ,  G02B6/4249 ,  G02B6/428 ,  G02B6/4292 ,  H04B10/2504 ,  H04B10/40 ,  H04B10/503 ,  H04B10/516

Abstract: A method and system is provided for cassette based wavelength division multiplexing and may include an optical system with an aggregating cassette. The optical system may include optical transceivers, with each generating optical signals at a different wavelength. The aggregating cassette may include one or more multiplexers coupled to each of the optical transceivers via optical fibers. The optical transceivers may generate modulated optical signals at one of the different wavelengths. The optical fibers may communicate one of the modulated optical signals from each of the optical transceivers to the one or more multiplexers. The modulated optical signals may be multiplexed to one or more output optical fibers. The multiplexed signals may be communicated to one or more receiving demultiplexers using the one or more output optical fibers. The one or more demultiplexers may demultiplex said multiplexed signals into separate wavelength signals.

公开(公告)号：US09553676B2

公开(公告)日：2017-01-24

申请号：US15045216

申请日：2016-02-16

Applicant: Luxtera, Inc.

Inventor： Brian Welch

IPC: H04B10/00 ,  H04B10/60 ,  H04L25/02 ,  H04B10/50 ,  H04B10/516 ,  H04B10/564 ,  H04J14/00 ,  G02B6/42

CPC classification number: H04L25/061 ,  G02B6/4201 ,  G02B6/4242 ,  H04B10/501 ,  H04B10/516 ,  H04B10/564 ,  H04B10/60 ,  H04B10/693 ,  H04L25/0272

Abstract: Methods and systems for split voltage domain receiver circuits are disclosed and may comprise amplifying received electrical signals in a plurality of partial voltage domains, and combining the amplified received signals, utilizing a stacked cascode amplifier for each partial voltage domain, into a single differential signal in a single voltage domain. The stacked cascode amplifiers may comprise a feedback loop having a comparator which controls a current source in each domain. The signals may be received from a photodiode, which may be integrated in the integrated circuit. The amplified signals may be combined via stacked common source or common emitter amplifiers. The received signals via may be amplified by stacked inverters. The amplified received signals may be AC or DC coupled prior to the combining. The received electrical signals may be amplified and combined via cascode amplifiers. The voltage domains may be stacked and may be controlled by feedback loops.

Abstract translation: 公开了用于分压电压域接收器电路的方法和系统，并且可以包括放大多个部分电压域中的接收电信号，并且将放大的接收信号用于每个部分电压域的堆叠级联放大器组合成单个差分信号 单个电压域。 堆叠的共源共栅放大器可以包括具有控制每个域中的电流源的比较器的反馈回路。 信号可以从可以集成在集成电路中的光电二极管接收。 放大的信号可以通过堆叠的公共源或公共发射放大器组合。 所接收的信号通过堆叠的反相器可以被放大。 放大的接收信号可以在组合之前被AC或DC耦合。 所接收的电信号可以通过共源共栅放大器进行放大和组合。 电压域可以堆叠并且可以由反馈回路控制。

公开(公告)号：US20150333836A1

公开(公告)日：2015-11-19

申请号：US14281241

申请日：2014-05-19

Applicant: Luxtera, Inc.

Inventor： Brian Welch

IPC: H04B10/60

CPC classification number: H04L25/061 ,  G02B6/4201 ,  G02B6/4242 ,  H04B10/501 ,  H04B10/516 ,  H04B10/564 ,  H04B10/60 ,  H04B10/693 ,  H04L25/0272

Abstract: Methods and systems for split voltage domain receiver circuits are disclosed and may comprise amplifying complementary received signals in a plurality of partial voltage domains, and combining the amplified received signals, utilizing a stacked cascode amplifier for each domain, into a single differential signal in a single voltage domain. The stacked cascode amplifiers may comprise a feedback loop having a comparator which controls a current source in each domain. The complementary signals may be received from a photodiode, which may be integrated in the integrated circuit. The amplified received signals may be combined via stacked common source or common emitter amplifiers. The received signals via may be amplified by stacked inverters. The amplified received signals may be AC or DC coupled prior to the combining. The complementary received signals may be amplified and combined via cascode amplifiers. The voltage domains may be stacked and may be controlled by feedback loops.

Abstract translation: 公开了用于分压电压域接收器电路的方法和系统，并且可以包括放大多个部分电压域中的互补接收信号，并且将放大的接收信号组合为每个域的堆叠级联放大器，形成单个差分信号 电压域。 堆叠的共源共栅放大器可以包括具有控制每个域中的电流源的比较器的反馈回路。 可以从可以集成在集成电路中的光电二极管接收互补信号。 放大的接收信号可以通过堆叠的公共源或公共发射极放大器组合。 所接收的信号通过堆叠的反相器可以被放大。 放大的接收信号可以在组合之前被AC或DC耦合。 互补的接收信号可以通过共源共栅放大器被放大和组合。 电压域可以堆叠并且可以由反馈回路控制。

公开(公告)号：US09172474B2

公开(公告)日：2015-10-27

申请号：US14229243

申请日：2014-03-28

Applicant: Luxtera, Inc.

Inventor： Brian Welch ,  Daniel Kucharski

IPC: H04B10/564 ,  H04L25/02 ,  H04B10/50 ,  H04B10/516 ,  G02B6/42

CPC classification number: H04L25/061 ,  G02B6/4201 ,  G02B6/4242 ,  H04B10/501 ,  H04B10/516 ,  H04B10/564 ,  H04B10/60 ,  H04B10/693 ,  H04L25/0272

Abstract: Methods and systems for a photonically enabled complementary metal-oxide semiconductor (CMOS) chip are disclosed and may comprise in an integrated circuit comprising a driver: amplifying a received signal in a plurality of partial voltage domains, and generating the partial voltage domains in a domain splitter in the driver. A voltage domain boundary value between two partial voltage domains may be controlled utilizing a differential amplifier that samples an output voltage of a cascade amplifier that is an input to the driver and controls a current supplying said cascade amplifier. A series of diodes may be driven in differential mode via the amplified signals. An optical signal may be modulated via the diodes, which may be integrated in a Mach-Zehnder modulator or a ring modulator. The diodes may be connected in a distributed configuration. The amplified signals may be communicated to the diodes via transmission lines, which may be even-mode coupled.

Abstract translation: 公开了用于光子学互补金属氧化物半导体（CMOS）芯片的方法和系统，并且可以包括在包括驱动器的集成电路中：放大多个部分电压域中的接收信号，以及在域中产生部分电压域 分配器在驱动程序。 可以利用差分放大器来控制两个部分电压域之间的电压域边界值，所述差分放大器对作为驱动器的输入的级联放大器的输出电压进行采样，并控制提供所述级联放大器的电流。 一系列二极管可以通过放大信号以差分模式驱动。 光信号可以经由二极管进行调制，二极管可集成在马赫 - 曾德尔调制器或环形调制器中。 二极管可以以分布式配置连接。 放大的信号可以经由传输线传送到二极管，传输线可以是偶模耦合的。

公开(公告)号：US20140291489A1

公开(公告)日：2014-10-02

申请号：US14305733

申请日：2014-06-16

Applicant: Luxtera, Inc.

Inventor： Brian Welch

IPC: H03F3/45 ,  G01J1/44

CPC classification number: H03F3/45237 ,  G01J1/44 ,  H03F1/34 ,  H03F3/087 ,  H03F3/45071 ,  H03F3/45076 ,  H03F3/45475 ,  H03F3/45968 ,  H03F2200/405 ,  H03F2203/45222 ,  H03F2203/45288 ,  H03F2203/45511 ,  H03F2203/45526

Abstract: A system for a feedback amplifier with sub-40khz low-frequency cutoff is disclosed and may include amplifying electrical signals received via coupling capacitors utilizing an amplifier having feedback paths comprising source followers and feedback resistors. Gate terminals of the source followers may be coupled to output terminals of the amplifier circuit. The feedback paths may be coupled prior to the coupling capacitors at inputs of the amplifier circuit. Voltages may be level shifted prior to the coupling capacitors to ensure stable bias conditions for the amplifier circuit. The amplifier circuit may be integrated in a CMOS photonics chip with the source followers comprising CMOS transistors. The amplifier circuit may receive current-mode logic or voltage signals. The electrical signals may be received from a photodetector, which may comprise a silicon germanium photodiode differentially coupled to the amplifier circuit. Optical signals for the photodetector in the chip may be received via optical fibers.

Abstract translation: 公开了一种具有低于40khz低频截止的反馈放大器的系统，并且可以包括利用具有包括源极跟随器和反馈电阻器的反馈路径的放大器放大经由耦合电容器接收的电信号。 源极跟随器的栅极端子可以耦合到放大器电路的输出端子。 反馈路径可以在放大器电路的输入端处的耦合电容器之前被耦合。 在耦合电容器之前，电压可能会发生电平偏移，以确保放大器电路的稳定偏置条件。 放大器电路可以集成在具有CMOS晶体管的源极跟随器的CMOS光子芯片中。 放大器电路可以接收电流模式逻辑或电压信号。 电信号可以从光电检测器接收，光电检测器可以包括差分耦合到放大器电路的硅锗光电二极管。 可以通过光纤接收芯片中的光电检测器的光信号。

公开(公告)号：US20190334649A1

公开(公告)日：2019-10-31

申请号：US16505349

申请日：2019-07-08

Applicant: Luxtera, Inc.

Inventor： Brian Welch

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

Abstract: A method and system is provided for cassette based wavelength division multiplexing and may include an optical system with an aggregating cassette. The optical system may include optical transceivers, with each generating optical signals at a different wavelength. The aggregating cassette may include one or more multiplexers coupled to each of the optical transceivers via optical fibers. The optical transceivers may generate modulated optical signals at one of the different wavelengths. The optical fibers may communicate one of the modulated optical signals from each of the optical transceivers to the one or more multiplexers. The modulated optical signals may be multiplexed to one or more output optical fibers. The multiplexed signals may be communicated to one or more receiving demultiplexers using the one or more output optical fibers. The one or more demultiplexers may demultiplex the multiplexed signals into separate wavelength signals.