公开(公告)号：US10425165B1

公开(公告)日：2019-09-24

申请号：US16188899

申请日：2018-11-13

Applicant: Luxtera, Inc.

Inventor： Brian Welch ,  Xuelin Xu

IPC: H04B10/516 ,  H04B10/524 ,  H04B10/50 ,  H04B10/54

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：US20190049666A1

公开(公告)日：2019-02-14

申请号：US16059328

申请日：2018-08-09

Applicant: Luxtera, Inc.

Inventor： Brian Welch

IPC: G02B6/126 ,  G02B6/42 ,  H04B10/40 ,  H04B10/25

Abstract: Methods and systems for all optical tunable equalizers may include an optical modulator comprising an input waveguide, first and second directional couplers, phase modulators, an optical delay, and an optical attenuator. The optical modulator may be operable to receive an input optical signal via the input waveguide, couple a portion of the input optical signal to a second waveguide via the first directional coupler, modulate a phase of optical signals in the input waveguide and the second waveguide using the phase modulators, and couple a feedback optical signal to the first directional coupler via the second directional coupler, the optical delay, and the optical attenuator. The optical modulator may be operable to communicate an output signal of said optical modulator from a first output of the second directional coupler. The optical modulator may be operable to communicate the feedback optical signal from a second output of the second directional coupler.

公开(公告)号：US10128957B2

公开(公告)日：2018-11-13

申请号：US14997935

申请日：2016-01-18

Applicant: Luxtera, Inc.

Inventor： Brian Welch ,  Xuelin Xu

IPC: H04B10/00 ,  H04B10/516 ,  H04B10/50 ,  H04B10/524 ,  H04B10/54

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：US10120126B2

公开(公告)日：2018-11-06

申请号：US15830467

申请日：2017-12-04

Applicant: Luxtera, Inc.

Inventor： Brian Welch ,  Attila Mekis ,  Steffan Gloeckner

IPC: H04J14/00 ,  H04J14/02 ,  G02B6/12 ,  H04B10/40 ,  H04B10/80 ,  G02B6/124 ,  G02B6/125 ,  G02B6/293 ,  G02B6/42

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：US09806920B2

公开(公告)日：2017-10-31

申请号：US15412352

申请日：2017-01-23

Applicant: Luxtera, Inc.

Inventor： Brian Welch

IPC: H04B10/00 ,  H04L25/06 ,  H04B10/69 ,  H04J14/00

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 include amplifying complementary received signals in a plurality of partial voltage domains. The signals may be combined into a single differential signal in a single voltage domain. Each of the partial voltage domains may be offset by a DC voltage from the other partial voltage domains. The sum of the partial domains may be equal to a supply voltage of the integrated circuit. The complementary signals may be received from a photodiode. The amplified received signals may be amplified via stacked common source amplifiers, common emitter amplifiers, or stacked inverters. The amplified received signals may be DC coupled prior to combining. The complementary received signals may be amplified and combined via cascode amplifiers. The voltage domains may be stacked, and may be controlled via feedback loops. The photodetector may be integrated in the integrated circuit.

公开(公告)号：US20170141853A1

公开(公告)日：2017-05-18

申请号：US15356010

申请日：2016-11-18

Applicant: Luxtera, Inc.

Inventor： Brian Welch ,  Gianlorenzo Masini

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

CPC classification number: H04B10/693 ,  H03F3/085 ,  H03G3/3084 ,  H03H21/0012 ,  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：US09577780B2

公开(公告)日：2017-02-21

申请号：US14752709

申请日：2015-06-26

Applicant: Luxtera, Inc.

Inventor： Brian Welch

IPC: H04J14/02 ,  H04B10/40 ,  G02B6/293 ,  G02F1/025 ,  G02B6/42 ,  G02B6/12 ,  G02B6/27 ,  G02B6/34

CPC classification number: H04J14/0221 ,  G02B6/12007 ,  G02B6/1225 ,  G02B6/2773 ,  G02B6/2786 ,  G02B6/29352 ,  G02B6/29353 ,  G02B6/2938 ,  G02B6/29395 ,  G02B6/29397 ,  G02B6/34 ,  G02B6/4215 ,  G02F1/025 ,  G02F1/225 ,  G02F1/2257 ,  G02F2001/212 ,  G02F2203/06 ,  H04B10/40 ,  H04B10/5161 ,  H04B10/801 ,  H04J14/02

Abstract: Methods and systems for a polarization immune wavelength division multiplexing demultiplexer are disclosed and may include, in an optoelectronic transceiver having an input coupler, a demultiplexer, and an amplitude scrambler: receiving input optical signals of different polarization via the input coupler, communicating the input optical signals to the amplitude scrambler via waveguides, configuring the average optical power in each of the waveguides utilizing the amplitude scrambler, and demultiplexing the optical signals utilizing the demultiplexer. The amplitude scrambler may include phase modulators and a coupling section. The phase modulators may include sections of P-N junctions in the two waveguides. The demultiplexer may include a Mach-Zehnder Interferometer. The demultiplexed signals may be received utilizing photodetectors. The input coupler may include a polarization splitting grating coupler. The average optical power may be configured above which demultiplexer control circuitry is able to control the demultiplexer to process incoming optical signals.

Abstract translation: 公开了用于极化免疫波分复用解复用器的方法和系统，并且可以包括在具有输入耦合器的光电收发器，解复用器和幅度扰频器中：经由输入耦合器接收不同极化的输入光信号，将输入光 通过波导将信号发送到幅度扰频器，利用幅度扰频器来构成每个波导中的平均光功率，以及利用解复用器解复用光信号。 振幅扰频器可以包括相位调制器和耦合部分。 相位调制器可以包括两个波导中的P-N结的部分。 解复用器可以包括马赫 - 曾德干涉仪。 可以使用光电检测器来接收解复用的信号。 输入耦合器可以包括偏振分束光栅耦合器。 平均光功率可以被配置在上面，多路分解器控制电路能够控制解复用器来处理输入的光信号。

公开(公告)号：US20160211921A1

公开(公告)日：2016-07-21

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.

Abstract translation: 公开了具有局域分解的分布式光发射机的方法和系统，并且可以包括在集成在硅光子芯片中的光学调制器中：接收电信号，沿着光调制器的波导长度将电信号传送到分段器，利用 一个或多个延迟线，利用域分离器在电压域中产生电信号，通过利用在电压域中产生的电信号驱动二极管来调制光调制器的波导中的接收光信号，并通过干扰产生调制输出信号 在光调制器的波导中的调制光信号。 延迟线可以包括每个域分离器的一个延迟元件，或者可以包括用于域分割器的第一子集的每个域分离器的延迟元件，以及用于域分割器的第二子集的每个域分离器的多于一个延迟元件。

公开(公告)号：US20160072651A1

公开(公告)日：2016-03-10

申请号：US14845961

申请日：2015-09-04

Applicant: Luxtera, Inc.

Inventor： Brian Welch

IPC: H04L25/49 ,  H04L27/20

CPC classification number: H04L25/4917 ,  H04B10/00 ,  H04B10/516 ,  H04L25/4906

Abstract: Methods and systems for a multi-level encoded data path with decoder are disclosed and may include, in a receiver on a chip: receiving a multi-level encoded signal, generating a plurality of copy signals offset from the multi-level encoded signal by a configurable offset voltage, comparing each copy signal against a different threshold level, and generating binary data based on the comparison. At least one of the plurality of copy signals may be compared using a clock data recovery module and/or using a retimer, which may comprise at least one D flip-flop. The multi-level encoded signal may comprise a pulse amplitude modulated-4 (PAM-4) signal. The multi-level encoded signal may be received from a photodiode on the chip. An optical signal may be communicated to the photodiode from a grating coupler on the chip.

Abstract translation: 公开了用于具有解码器的多级编码数据路径的方法和系统，并且可以包括在芯片上的接收器中：接收多电平编码信号，从多电平编码信号产生偏移的多个复制信号 将每个复制信号与不同的阈值电平进行比较，以及基于该比较生成二进制数据。 可以使用时钟数据恢复模块和/或使用重定时器来比较多个复制信号中的至少一个，其可以包括至少一个D触发器。 多电平编码信号可以包括脉冲幅度调制4（PAM-4）信号。 可以从芯片上的光电二极管接收多电平编码信号。 光信号可以从芯片上的光栅耦合器传送到光电二极管。

公开(公告)号：US20140212150A1

公开(公告)日：2014-07-31

申请号：US14229243

申请日：2014-03-28

Applicant: LUXTERA, INC.

Inventor： Brian Welch ,  Daniel Kucharski

IPC: H04B10/564 ,  H04B10/516 ,  H04B10/50

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。