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    OFF QUADRATURE MACH-ZEHNDER MODULATOR BIASING
    1.
    发明申请
    OFF QUADRATURE MACH-ZEHNDER MODULATOR BIASING 审中-公开

    公开(公告)号：US20190363799A1

    公开(公告)日：2019-11-28

    申请号：US16536162

    申请日：2019-08-08

    Applicant: INPHI CORPORATION

    Inventor： Todd ROPE ,  Radhakrishnan L. NAGARAJAN ,  Hari SHANKAR

    IPC: H04B10/516 ,  H04B10/556 ,  H04B10/50 ,  H04J14/02 ,  H01S5/14 ,  G02F1/01 ,  G02F1/225 ,  H01S5/0687 ,  H01S5/40

    Abstract: The present invention relates to telecommunication techniques and integrated circuit (IC) devices. More specifically, embodiments of the present invention provide an off-quadrature modulation system. Once an off-quadrature modulation position is determined, a ratio between DC power transfer amplitude and dither tone amplitude for a modulator is as a control loop target to stabilize off-quadrature modulation. DC power transfer amplitude is obtained by measuring and sampling the output of an optical modulator. Dither tone amplitude is obtained by measuring and sampling the modulator output and performing calculation using the optical modulator output values and corresponding dither tone values. There are other embodiments as well.

    OFF QUADRATURE BIASING OF MACH ZEHNDER MODULATOR FOR IMPROVED OSNR PERFORMANCE
    2.
    发明申请
    OFF QUADRATURE BIASING OF MACH ZEHNDER MODULATOR FOR IMPROVED OSNR PERFORMANCE 有权
    关闭用于改进OSNR性能的MACH ZEHNDER调节器的正交偏置

    公开(公告)号：US20170059889A1

    公开(公告)日：2017-03-02

    申请号：US15348018

    申请日：2016-11-10

    Applicant: INPHI CORPORATION

    Inventor： Radhakrishnan L. NAGARAJAN ,  Hari SHANKAR ,  Masaki KATO ,  Yang FU

    IPC: G02F1/01 ,  H04B10/50 ,  G02F1/225

    CPC classification number: G02F1/0123 ,  G02B6/12007 ,  G02F1/0147 ,  G02F1/025 ,  G02F1/225 ,  G02F1/2255 ,  G02F2001/212 ,  G02F2202/105 ,  H01S3/06754 ,  H01S3/1608 ,  H01S5/0085 ,  H01S5/0687 ,  H01S5/4012 ,  H01S5/4087 ,  H04B10/505 ,  H04B10/50575

    Abstract: An integrated optical modulator device. The device can include a driver module coupled to an optical modulator. The optical modulator is characterized by a raised cosine transfer function. This optical modulator can be coupled to a light source and a bias control module, which is configured to apply an off-quadrature bias to the optical modulator. This bias can be accomplished by applying an inverse of the modulator transfer function to the optical modulator in order to minimize a noise variance. This compression function can result in an optimized increased top eye opening for a signal associated with the optical modulator. Furthermore, the optical modulator can be coupled to an EDFA (Erbium Doped Fiber Amplifier) that is coupled to a filter coupled an O/E (Optical-to-Electrical) receiver.

    Abstract translation: 集成光调制器装置。 该装置可以包括耦合到光调制器的驱动器模块。 光调制器的特征在于升高的余弦传递函数。 该光调制器可以耦合到光源和偏置控制模块，该偏置控制模块被配置为向光调制器施加非正交偏置。 可以通过将调制器传递函数的反相应用于光调制器来实现该偏置，以便最小化噪声方差。 该压缩功能可以导致用于与光学调制器相关联的信号的优化的增加的顶部眼睛开度。 此外，光调制器可以耦合到耦合到耦合到O / E（光 - 电）接收器的滤波器的EDFA（掺铒光纤放大器）。

    OFF QUADRATURE BIASING OF MACH ZEHNDER MODULATOR FOR IMPROVED OSNR PERFORMANCE
    5.
    发明申请
    OFF QUADRATURE BIASING OF MACH ZEHNDER MODULATOR FOR IMPROVED OSNR PERFORMANCE 有权
    关闭用于改进OSNR性能的MACH ZEHNDER调节器的正交偏置

    公开(公告)号：US20160327816A1

    公开(公告)日：2016-11-10

    申请号：US15072866

    申请日：2016-03-17

    Applicant: INPHI CORPORATION

    Inventor： Radhakrishnan L. NAGARAJAN ,  Hari SHANKAR ,  Masaki KATO ,  Yang FU

    IPC: G02F1/01 ,  H01S3/067 ,  H01S3/16 ,  G02F1/225

    CPC classification number: G02F1/0123 ,  G02B6/12007 ,  G02F1/0147 ,  G02F1/025 ,  G02F1/225 ,  G02F1/2255 ,  G02F2001/212 ,  G02F2202/105 ,  H01S3/06754 ,  H01S3/1608 ,  H01S5/0085 ,  H01S5/0687 ,  H01S5/4012 ,  H01S5/4087 ,  H04B10/505 ,  H04B10/50575

    Abstract: An integrated optical modulator device. The device can include a driver module coupled to an optical modulator. The optical modulator is characterized by a raised cosine transfer function. This optical modulator can be coupled to a light source and a bias control module, which is configured to apply an off-quadrature bias to the optical modulator. This bias can be accomplished by applying an inverse of the modulator transfer function to the optical modulator in order to minimize a noise variance. This compression function can result in an optimized increased top eye opening for a signal associated with the optical modulator. Furthermore, the optical modulator can be coupled to an EDFA (Erbium Doped Fiber Amplifier) that is coupled to a filter coupled an O/E (Optical-to-Electrical) receiver.

    Abstract translation: 集成光调制器装置。 该装置可以包括耦合到光调制器的驱动器模块。 光调制器的特征在于升高的余弦传递函数。 该光调制器可以耦合到光源和偏置控制模块，该偏置控制模块被配置为向光调制器施加非正交偏置。 可以通过将调制器传递函数的反相应用于光调制器来实现该偏置，以便最小化噪声方差。 该压缩功能可以导致用于与光学调制器相关联的信号的优化的增加的顶部眼睛开度。 此外，光调制器可以耦合到耦合到耦合到O / E（光 - 电）接收器的滤波器的EDFA（掺铒光纤放大器）。

    ADAPTIVE MACH ZEHNDER MODULATOR LINEARIZATION
    6.
    发明申请
    ADAPTIVE MACH ZEHNDER MODULATOR LINEARIZATION 有权
    自适应调谐器调制器线性化

    公开(公告)号：US20150229403A1

    公开(公告)日：2015-08-13

    申请号：US14179447

    申请日：2014-02-12

    Applicant: INPHI CORPORATION

    Inventor： Hari SHANKAR

    IPC: H04B10/516 ,  H04B10/2575

    CPC classification number: H04B10/516 ,  H04B10/2575 ,  H04B10/50572 ,  H04B10/50593 ,  H04B10/588

    Abstract: The present invention is directed to optical communication systems and methods thereof. In various embodiments, the present invention provides method for linearizing Mach Zehnder modulators by digital pre-compensation and adjusting the gain of the driver and/or the modulation index. The pre-compensation can be implemented as a digital pre-compensation algorithm, which is a part of an adaptive feedback loop. There are other embodiments as well.

    Abstract translation: 本发明涉及光通信系统及其方法。 在各种实施例中，本发明提供了通过数字预补偿线性化马赫曾德调制器并调整驱动器的增益和/或调制指数的方法。 预补偿可以实现为数字预补偿算法，其是自适应反馈回路的一部分。 还有其它实施例。

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