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1.发明授权公开(公告)号：US11418160B2
公开(公告)日：2022-08-16
申请号：US16945013
申请日：2020-07-31
申请人： Luxtera LLC
发明人： Brian Welch
摘要： A sub-40 kilohertz low-frequency cutoff is provided for via a transimpedance amplifier comprising differential inputs and differential outputs; coupling capacitors comprising input terminals configured to receive electrical signals, and output terminals coupled to the differential inputs; and feedback paths coupled to the differential outputs and operable to level shift voltage levels at the input terminals. In some embodiments, the feedback paths comprise source follower transistors wherein the differential outputs are coupled to gate terminals of the source follower transistors or the feedback paths further comprise feedback resistors. In some embodiments, a bias resistor is coupled between the differential inputs.
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公开(公告)号：US11228374B2
公开(公告)日：2022-01-18
申请号：US16926452
申请日：2020-07-10
申请人： Luxtera LLC
发明人： Brian Welch , Xuelin Xu
IPC分类号： H04B10/516 , H04B10/524 , H04B10/50 , H04B10/54
摘要： Methods and systems for a distributed optical transmitter with local domain splitting are 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 via one or more delay lines, and generating electrical signals in voltage domains utilizing the domain splitters for modulating the optical signals in the waveguides of the optical modulator by driving diodes with the electrical signals generated in the voltage domains. 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.
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公开(公告)号：US20200350993A1
公开(公告)日：2020-11-05
申请号：US16926452
申请日：2020-07-10
申请人： Luxtera LLC
发明人： Brian Welch , Xuelin Xu
IPC分类号： H04B10/516 , H04B10/524 , H04B10/50 , H04B10/54
摘要： Methods and systems for a distributed optical transmitter with local domain splitting are 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 via one or more delay lines, and generating electrical signals in voltage domains utilizing the domain splitters for modulating the optical signals in the waveguides of the optical modulator by driving diodes with the electrical signals generated in the voltage domains. 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.
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公开(公告)号：US10784964B2
公开(公告)日：2020-09-22
申请号：US16580813
申请日：2019-09-24
申请人： Luxtera LLC.
发明人： Brian Welch , Xuelin Xu
IPC分类号： H04B10/516 , H04B10/524 , H04B10/50 , H04B10/54
摘要： 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, and generating electrical signals in voltage domains utilizing the domain splitters for modulating the optical signals in the waveguides of the optical modulator by driving diodes with the electrical signals generated in the voltage domains. 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.
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公开(公告)号：US11275225B2
公开(公告)日：2022-03-15
申请号：US16793408
申请日：2020-02-18
申请人： Luxtera LLC
摘要： Methods and systems for an optical coupler for photonics devices are disclosed and may include a photonics transceiver comprising a silicon photonics die and a fiber connector for receiving optical fibers and including a die coupler and an optical coupling element. The die coupler may be bonded to a top surface of the photonics die and aligned above an array of grating couplers. The optical coupling element may be attached to the die coupler and the electronics die and the source module may be bonded to the top surface of the photonics die. Modulated optical signals may be received in the photonics die from optical fibers coupled to the fiber connector.
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公开(公告)号：US10917267B2
公开(公告)日：2021-02-09
申请号：US16730596
申请日：2019-12-30
申请人： Luxtera LLC.
发明人： Brian Welch
IPC分类号： H04B10/00 , H04L25/06 , H04B10/60 , H04L25/02 , H04B10/50 , H04B10/516 , H04B10/564 , H04B10/69 , H04J14/00 , G02B6/42
摘要： 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.
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公开(公告)号：US11855698B2
公开(公告)日：2023-12-26
申请号：US17645678
申请日：2021-12-22
申请人： Luxtera LLC
发明人： Brian Welch , Xuelin Xu
IPC分类号： H04B10/516 , H04B10/524 , H04B10/50 , H04B10/54
CPC分类号： H04B10/516 , H04B10/5055 , H04B10/524 , H04B10/541
摘要： Methods and systems for a distributed optical transmitter with local domain splitting are 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 via one or more delay lines, and generating electrical signals in voltage domains utilizing the domain splitters for modulating the optical signals in the waveguides of the optical modulator by driving diodes with the electrical signals generated in the voltage domains. 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.
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公开(公告)号：US11262637B2
公开(公告)日：2022-03-01
申请号：US16742707
申请日：2020-01-14
申请人： Luxtera LLC
发明人： Brian Welch
摘要： A frequency diverse distributed Mach-Zehnder Interferometer may include an optical modulator on a chip, with the modulator comprising a plurality of diodes arranged along a waveguide and with each diode driven by two or more drivers. An optical signal may be received in the waveguide, and a first modulating electrical signal may be applied to a first of the plurality of diodes using a first driver and a second modulating electrical signal may be applied to the first of the plurality of diodes using a second driver. The first electrical signal may be different from the second modulating electrical signal. The second electrical signal may have a larger voltage swing than the first electrical signal. The first electrical signal voltage swing may be 0.85 volts and the second electrical signal voltage swing may be 1.5 volts, for example. The first and second electrical signals may have different frequencies.
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公开(公告)号：US11212007B2
公开(公告)日：2021-12-28
申请号：US16424137
申请日：2019-05-28
申请人： Luxtera LLC.
发明人： Daniel Kucharski , Brian Welch , Sherif Abdalla
IPC分类号： G02B26/00 , G02F1/01 , H04B10/516 , G02F1/225 , H04B10/50 , H04B10/54 , G02B26/06 , H04B10/079 , G02F1/21 , G02B26/08
摘要： Methods and systems for encoding multi-level pulse amplitude modulated signals using integrated optoelectronics are disclosed and may include generating a multi-level, amplitude-modulated optical signal utilizing an optical modulator driven by first and second electrical input signals, where the optical modulator may configure levels in the multi-level amplitude modulated optical signal, drivers are coupled to the optical modulator; and the first and second electrical input signals may be synchronized before being communicated to the drivers. The optical modulator may include optical modulator elements coupled in series and configured into groups. The number of optical modular elements and groups may configure the number of levels in the multi-level amplitude modulated optical signal. Unit drivers may be coupled to each of the groups. The electrical input signals may be synchronized before communicating them to the unit drivers utilizing flip-flops. Phase addition may be synchronized utilizing one or more electrical delay lines.
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公开(公告)号：US20200183109A1
公开(公告)日：2020-06-11
申请号：US16793408
申请日：2020-02-18
申请人： Luxtera LLC
摘要： Methods and systems for an optical coupler for photonics devices are disclosed and may include a photonics transceiver comprising a silicon photonics die and a fiber connector for receiving optical fibers and including a die coupler and an optical coupling element. The die coupler may be bonded to a top surface of the photonics die and aligned above an array of grating couplers. The optical coupling element may be attached to the die coupler and the electronics die and the source module may be bonded to the top surface of the photonics die. Modulated optical signals may be received in the photonics die from optical fibers coupled to the fiber connector.
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