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    Frequency division multiple access optical subcarriers
    1.
    发明授权
    Frequency division multiple access optical subcarriers 有权

    公开(公告)号：US12255731B2

    公开(公告)日：2025-03-18

    申请号：US17561805

    申请日：2021-12-24

    Applicant: Infinera Corporation

    Inventor： Jeffrey T. Rahn ,  Kuang-Tsan Wu ,  Steven J. Hand ,  David F. Welch

    IPC: H04B7/26 ,  H04B10/077 ,  H04B10/079 ,  H04B10/25 ,  H04B10/2575 ,  H04B10/40 ,  H04B10/50 ,  H04B10/548 ,  H04B10/61 ,  H04B10/69 ,  H04J14/00 ,  H04J14/02 ,  H04J14/08 ,  H04J99/00 ,  H04L1/00 ,  H04L5/00 ,  H04Q11/00

    Abstract: A network or system in which a hub or primary node may communicate with a plurality of leaf or secondary nodes. The hub node may operate or have a capacity greater than that of the leaf nodes. Accordingly, relatively inexpensive leaf nodes may be deployed to receive data carrying optical signals from, and supply data carrying optical signals to, the hub node. One or more connections may couple each leaf node to the hub node, whereby each connection may include one or more spans or segments of optical fibers, optical amplifiers, optical splitters/combiners, and optical add/drop multiplexer, for example. Optical subcarriers may be transmitted over such connections, each carrying a data stream. The subcarriers may be generated by a combination of a laser and a modulator, such that multiple lasers and modulators are not required, and costs may be reduced. As the bandwidth or capacity requirements of the leaf nodes change, the number of subcarriers, and thus the amount of data provided to each node, may be changed accordingly. Each subcarrier within a dedicated group of subcarriers may carry OAM or control channel information to a corresponding leaf node, and such information may be used by the leaf node to configure the leaf node to have a desired bandwidth or capacity.

    Clock Recovery for Digital Subcarriers for Optical Networks
    2.
    发明公开
    Clock Recovery for Digital Subcarriers for Optical Networks 审中-公开

    公开(公告)号：US20230388041A1

    公开(公告)日：2023-11-30

    申请号：US17752832

    申请日：2022-05-24

    Applicant: Infinera Corporation

    Inventor： Jeffrey T. Rahn ,  Kuang-Tsan Wu ,  Steven Joseph Hand ,  Han Henry Sun

    IPC: H04J14/02 ,  H04Q11/00

    CPC classification number: H04J14/0246 ,  H04J14/0282 ,  H04Q11/0067

    Abstract: Optical network systems and components are disclosed, including a transmitter comprising a digital signal processor that receives data; circuitry that generate a plurality of electrical signals based on the data; a plurality of filters, each of which receiving a corresponding one of the plurality of electrical signals, a plurality of roll-off factors being associated with a respective one of the plurality of filters; a plurality of DACs that receive outputs from the digital signal processor, the outputs being indicative of outputs from the plurality of filters; a laser that supplies light; and a modulator that receives the light and outputs from the DACs, and supplies a plurality of optical subcarriers based on the outputs, such that one of the optical subcarriers has a frequency bandwidth that is wider than remaining ones of the optical subcarriers, said one of the optical subcarriers carrying information for clock recovery.

    Clock Recovery for Digital Subcarriers for Optical Networks
    3.
    发明申请
    Clock Recovery for Digital Subcarriers for Optical Networks 有权

    公开(公告)号：US20230135594A1

    公开(公告)日：2023-05-04

    申请号：US18091838

    申请日：2022-12-30

    Applicant: Infinera Corporation

    Inventor： Jeffrey T. Rahn ,  Kuang-Tsan Wu ,  Steven Joseph Hand ,  Han Henry Sun

    IPC: H04J14/02 ,  H04Q11/00

    Abstract: Optical network systems and components are disclosed, including a transmitter comprising a digital signal processor that receives data; circuitry that generate a plurality of electrical signals based on the data; a plurality of filters, each of which receiving a corresponding one of the plurality of electrical signals, a plurality of roll-off factors being associated with a respective one of the plurality of filters; a plurality of DACs that receive outputs from the digital signal processor, the outputs being indicative of outputs from the plurality of filters; a laser that supplies light; and a modulator that receives the light and outputs from the DACs, and supplies a plurality of optical subcarriers based on the outputs, such that one of the optical subcarriers has a frequency bandwidth that is wider than remaining ones of the optical subcarriers, said one of the optical subcarriers carrying information for clock recovery.

    FREQUENCY DIVISION MULTIPLE ACCESS OPTICAL SUBCARRIERS
    4.
    发明申请
    FREQUENCY DIVISION MULTIPLE ACCESS OPTICAL SUBCARRIERS 有权

    公开(公告)号：US20220263581A1

    公开(公告)日：2022-08-18

    申请号：US17561941

    申请日：2021-12-25

    Applicant: Infinera Corporation

    Inventor： Jeffrey T. Rahn ,  Kuang-Tsan Wu ,  Steven J. Hand ,  David F. Welch

    IPC: H04B10/50 ,  H04B10/60 ,  H04B10/54

    Abstract: A network or system in which a hub or primary node may communicate with a plurality of leaf or secondary nodes. The hub node may operate or have a capacity greater than that of the leaf nodes. Accordingly, relatively inexpensive leaf nodes may be deployed to receive data carrying optical signals from, and supply data carrying optical signals to, the hub node. One or more connections may couple each leaf node to the hub node, whereby each connection may include one or more spans or segments of optical fibers, optical amplifiers, optical splitters/combiners, and optical add/drop multiplexer, for example. Optical subcarriers may be transmitted over such connections, each carrying a data stream. The subcarriers may be generated by a combination of a laser and a modulator, such that multiple lasers and modulators are not required, and costs may be reduced. As the bandwidth or capacity requirements of the leaf nodes change, the number of subcarriers, and thus the amount of data provided to each node, may be changed accordingly. Each subcarrier within a dedicated group of subcarriers may carry OAM or control channel information to a corresponding leaf node, and such information may be used by the leaf node to configure the leaf node to have a desired bandwidth or capacity.

    Optimized star-8QAM performance for binary encoding
    5.
    发明授权
    Optimized star-8QAM performance for binary encoding 有权

    公开(公告)号：US09998229B2

    公开(公告)日：2018-06-12

    申请号：US14986530

    申请日：2015-12-31

    Applicant: Infinera Corporation

    Inventor： Jeffrey T. Rahn ,  Han Henry Sun

    IPC: H04B10/516

    CPC classification number: H04B10/516 ,  H04B10/541

    Abstract: Consistent with an aspect of the present disclosure, optical signals are transmitted that are modulated in accordance with an 8QAM modulation format. The optical signals carry symbols of data and may be represented by a constellation in the IQ plane that includes four inner points that are symmetrically arranged about the origin, and four outer points that are uniformly distributed about the origin, but rotated relative to the inner points. The rotation is toward inner points that represent symbols for which an erroneous transition between the outer points and such inner points is more likely to result in a single bit error, instead of two bit errors, because the symbol corresponding to the outer point and the symbol corresponding to such inner point differ by just one bit. Accordingly, a binary forward error correction algorithm may be employed to correct the errored bit. Such binary forward error correction operates with greater efficiency compared to symbol-wise error correction and thus additional noise can be tolerated by the optical receiver.

    Arbitrary grid wavelocking using digitally generated out-of-band tones
    6.
    发明授权
    Arbitrary grid wavelocking using digitally generated out-of-band tones 有权
    使用数字生成的带外色调的任意网格波锁

    公开(公告)号：US09537577B2

    公开(公告)日：2017-01-03

    申请号：US14514840

    申请日：2014-10-15

    Applicant: Infinera Corporation

    Inventor： Jeffrey T. Rahn ,  David J. Krause

    IPC: H04B10/572 ,  H04J14/02 ,  G02B6/12 ,  H04B10/00

    CPC classification number: H04B10/572 ,  H04J14/02 ,  H04J14/0256

    Abstract: A device may insert a set of tones into a transmitter signal at a set of frequency offsets from a set of transmitter channels associated with a set of transmitter channel wavelengths. The set of transmitter channels may include a first channel being associated with a first quantity of bandwidth and a second channel associated with a second quantity of bandwidth. The first quantity of bandwidth may be different from the second quantity of bandwidth. The device may repeatedly adjust the transmitter signal to align the set of transmitter channel wavelengths based on a set of observed responses to the set of tones, generated based on the transmitter signal passing through an optical filter, failing to match a set of expected responses.

    Abstract translation: 设备可以以与一组发射机信道波长相关联的一组发射机信道的一组频率偏移将一组音调插入到发射机信号中。 所述发射机信道集合可以包括与第一数量带宽相关联的第一信道和与第二数量带宽相关联的第二信道。 第一数量的带宽可能与第二数量的带宽不同。 基于对基于通过光学滤波器的发射机信号而产生的对一组音调的观察到的响应的集合，设备可以重复地调整发射机信号以对准发射机信道波长的集合，不能匹配一组预期响应。

    Optical transfer linearity using test tones
    7.
    发明授权
    Optical transfer linearity using test tones 有权
    使用测试音调的光传输线性度

    公开(公告)号：US09407375B2

    公开(公告)日：2016-08-02

    申请号：US14042284

    申请日：2013-09-30

    Applicant: Infinera Corporation

    Inventor： Jeffrey T. Rahn

    IPC: H04B10/588

    CPC classification number: H04B10/588

    Abstract: An optical system may have an optical transmitter including a digital signal processor to receive a signal channel, determine a digital signal associated with the signal channel based on information in a look-up table and based on a test tone, and output the digital signal. The optical system may further have a digital-to-analog converter to convert the digital signal to an analog signal, a laser to provide an optical signal, and a modulator to receive the optical signal and the analog signal, and modulate the optical signal based on the analog signal to form a modulated optical signal. The optical system may also have a photodiode to convert the modulated optical signal to a digital signal, a tone detector to detect the test tone based on the digital signal, and a controller to modify the information in the look-up table based on the test tone.

    Abstract translation: 光学系统可以具有包括数字信号处理器以接收信号通道的光学发射器，基于查找表中的信息并基于测试音调确定与信号通道相关联的数字信号，并输出数字信号。 光学系统还可以具有数模转换器，以将数字信号转换成模拟信号，激光器提供光信号，调制器接收光信号和模拟信号，并调制基于光信号的 在模拟信号上形成调制光信号。 光学系统还可以具有光电二极管以将调制的光信号转换为数字信号，音调检测器基于数字信号检测测试音，以及控制器，用于基于测试修改查找表中的信息 音。

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