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    Method and apparatus for blind time skew compensation for coherent optical receivers
    2.
    发明授权
    Method and apparatus for blind time skew compensation for coherent optical receivers 有权
    用于相干光接收机的盲时间偏移补偿的方法和装置

    公开(公告)号：US09240843B1

    公开(公告)日：2016-01-19

    申请号：US13730246

    申请日：2012-12-28

    Applicant: Juniper Networks, Inc.

    Inventor： Christian Malouin ,  Philip A. Thomas ,  Murat Arabaci ,  Bo Zhang ,  Theodore J. Schmidt ,  Roberto Marcoccia

    IPC: H04B10/06 ,  H04B10/61

    CPC classification number: H04B10/616

    Abstract: In some embodiments, an apparatus includes a coherent optical receiver that can receive during a first time period a set of in-phase signals and a set of quadrature signals having a skew from the set of in-phase signals. The coherent receiver can blindly determine a delay between the set of in-phase signals and the set of quadrature signals based on the set of in-phase signals and the set of quadrature signals. The delay includes an intersymbol portion and an intrasymbol portion. The coherent optical receiver can apply the delay at a second time after the first time period such that a skew after the second time is less than the skew at the first time period.

    Abstract translation: 在一些实施例中，一种装置包括相干光接收机，其可以在第一时间周期期间接收一组同相信号和一组正交信号，该组正交信号具有来自该组同相信号的偏斜。 相干接收机可以基于同相信号和正交信号集合盲目地确定同相信号组和正交信号组之间的延迟。 延迟包括符号间部分和内符号部分。 相干光接收机可以在第一时间段之后的第二时间施加延迟，使得第二时间之后的偏斜小于第一时间段的偏斜。

    Method and apparatus for distortion correction in optical communication links
    5.
    发明授权
    Method and apparatus for distortion correction in optical communication links 有权

    公开(公告)号：US10958343B1

    公开(公告)日：2021-03-23

    申请号：US16456772

    申请日：2019-06-28

    Applicant: Juniper Networks, Inc.

    Inventor： Theodore J. Schmidt ,  Bo Zhang ,  Murat Arabaci ,  Roberto Marcoccia ,  Christian Malouin ,  Steven William Keck

    IPC: H04B10/50 ,  H04B10/2507

    Abstract: In some embodiments, an apparatus includes an optical transmitter module that can be electrically coupled to an electrical serializer/deserializer and a controller. The optical transmitter module can include an electrical detector that can receive an in-band signal. The electrical detector can send to the controller a first power error signal and a second power error signal based on the in-band signal. The controller can send a correction control signal to the electrical serializer/deserializer based on the first power error signal and the second power error signal such that the electrical serializer/deserializer sends a pre-emphasized signal to the optical transmitter module based on the correction control signal. In such embodiments, the first power error signal, the second power signal and the correction control signal are out-of-band signals.

    Fast chromatic dispersion estimation
    7.
    发明授权
    Fast chromatic dispersion estimation 有权
    快速色散估计

    公开(公告)号：US09225431B1

    公开(公告)日：2015-12-29

    申请号：US13854023

    申请日：2013-03-29

    Applicant: Juniper Networks, Inc.

    Inventor： Murat Arabaci ,  Christian Malouin ,  Philip A. Thomas ,  Theodore John Schmidt ,  Roberto Marcoccia

    IPC: H04B10/06 ,  H04B10/61

    CPC classification number: H04B10/6161 ,  H04B10/25133

    Abstract: This disclosure describes the Fast Chromatic Dispersion Estimation (FCDE) techniques which corrects for chromatic dispersion in high data rate optical communications systems such as some coherent optical communications systems. FCDE may utilize transform such as fast-Fourier transforms to estimate the chromatic dispersion. From an estimate of the chromatic dispersion, the techniques may determine filter tap coefficients for compensating the chromatic dispersion.

    Abstract translation: 本公开描述了在诸如一些相干光通信系统的高数据速率光通信系统中校正色散的快速色散估计（FCDE）技术。 FCDE可以利用诸如快速傅里叶变换的变换来估计色散。 根据色散的估计，这些技术可以确定用于补偿色散的滤波器抽头系数。

    Method and apparatus for distortion correction in optical communication links
    8.
    发明授权
    Method and apparatus for distortion correction in optical communication links 有权

    公开(公告)号：US10382131B1

    公开(公告)日：2019-08-13

    申请号：US15797241

    申请日：2017-10-30

    Applicant: Juniper Networks, Inc.

    Inventor： Theodore J. Schmidt ,  Bo Zhang ,  Murat Arabaci ,  Roberto Marcoccia ,  Christian Malouin ,  Steven William Keck

    IPC: H04B10/50 ,  H04B10/2507

    Abstract: In some embodiments, an apparatus includes an optical transmitter module that can be electrically coupled to an electrical serializer/deserializer and a controller. The optical transmitter module can include an electrical detector that can receive an in-band signal. The electrical detector can send to the controller a first power error signal and a second power error signal based on the in-band signal. The controller can send a correction control signal to the electrical serializer/deserializer based on the first power error signal and the second power error signal such that the electrical serializer/deserializer sends a pre-emphasized signal to the optical transmitter module based on the correction control signal. In such embodiments, the first power error signal, the second power signal and the correction control signal are out-of-band signals.

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