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    Sliding bias and peak limiting for optical hearing devices
    1.
    发明授权
    Sliding bias and peak limiting for optical hearing devices 有权

    公开(公告)号：US11800303B2

    公开(公告)日：2023-10-24

    申请号：US17534189

    申请日：2021-11-23

    申请人： Earlens Corporation

    发明人： Daniel J. Freed ,  Sunil Puria

    IPC分类号： H04R25/00 ,  H04B10/50 ,  H04B10/114

    CPC分类号： H04R25/554 ,  H04B10/114 ,  H04B10/50595 ,  H04R25/606 ,  H04R2225/33 ,  H04R2225/49 ,  H04R2460/03

    摘要： A processor comprises instructions to adjust a bias of an input signal in order to decrease a duty cycle of a pulse modulated optical signal. The bias can be increased, decreased, or maintained in response to one or more measured values of the signal. In many embodiments, a gain of the signal is adjusted with the bias in order to inhibit distortion. The bias can be adjusted slowly in order to inhibit audible noise, and the gain can be adjusted faster than the bias in order to inhibit clipping of the signal. In many embodiments, one or more of the bias or the gain is adjusted in response to a value of the signal traversing a threshold amount. The value may comprise a trough of the signal traversing the threshold.

    Optical modulation device and bias voltage control method
    2.
    发明授权
    Optical modulation device and bias voltage control method 有权
    光调制装置及偏压控制方法

    公开(公告)号：US09116368B2

    公开(公告)日：2015-08-25

    申请号：US14122687

    申请日：2012-08-21

    申请人： Hiroto Kawakami ,  Eiji Yoshida ,  Yutaka Miyamoto

    发明人： Hiroto Kawakami ,  Eiji Yoshida ,  Yutaka Miyamoto

    IPC分类号： G02F1/01 ,  G02F1/00 ,  H04B10/12 ,  G02B6/28 ,  G02F1/21 ,  H04B10/54 ,  H04L27/34 ,  H04L27/36 ,  H04B10/548 ,  H04B10/50

    CPC分类号： G02F1/0123 ,  G02B6/28 ,  G02F1/21 ,  G02F2001/212 ,  H04B10/5053 ,  H04B10/50575 ,  H04B10/50595 ,  H04B10/541 ,  H04B10/548 ,  H04L27/3411 ,  H04L27/364

    摘要： An optical modulation device including: bias power supplies that output a signal having a bias voltage corresponding to the null point of an optical modulation unit to the optical modulation unit; and synchronous detection circuits that determine whether an intensity of a QAM signal at a drift non-occurrence time where no drift occurs in the bias voltage becomes larger or smaller than the intensity of the QAM signal at a drift occurrence time where a drift occurs in the bias voltage, adjust the bias voltage to maximize the intensity of the QAM signal when determining that the intensity of the QAM signal at the drift non-occurrence time becomes larger than the intensity of the QAM signal at the drift occurrence time, and adjust the bias voltage to minimize the intensity of the QAM signal when determining that the intensity of the QAM signal at the drift non-occurrence time becomes smaller than the intensity of the QAM signal at the drift occurrence time.

    摘要翻译： 一种光调制装置，包括：向光调制单元输出具有对应于光调制单元的零点的偏置电压的信号的偏置电源; 以及同步检测电路，其确定在偏置电压中不发生漂移的漂移不发生时间的QAM信号的强度是否大于或者小于在漂移发生时的QAM信号的强度， 当确定漂移不发生时间的QAM信号的强度变得大于漂移发生时的QAM信号的强度时，调整偏置电压以最大化QAM信号的强度，并且调整偏置 电压，以便在确定漂移不发生时间的QAM信号的强度变得小于漂移发生时的QAM信号的强度时，使QAM信号的强度最小化。

    CONTROLLING BIAS VOLTAGES FOR OPTICAL MODULATORS
    3.
    发明申请
    CONTROLLING BIAS VOLTAGES FOR OPTICAL MODULATORS 有权
    控制光学调制器的偏置电压

    公开(公告)号：US20150110437A1

    公开(公告)日：2015-04-23

    申请号：US14398244

    申请日：2013-04-30

    申请人： BAE SYSTEM plc

    发明人： Andrew James Smith ,  Mohammed Nawaz

    IPC分类号： G02F1/01 ,  G02F1/225

    CPC分类号： G02F1/0123 ,  G02F1/225 ,  G02F1/2255 ,  G02F2001/212 ,  H04B10/50575 ,  H04B10/50595

    摘要： Methods and apparatus for controlling a bias voltage (20) supplied to an optical modulator that comprises a biasable component configurable to be biased by application of the bias voltage (20), the method comprising: providing a target for the modulator output power; applying, to the biasable component, a bias voltage (20) that biases the biasable component so that the output power is within a pre-defined range of the target; monitoring the output power and, if the output power of the modulator is determined to be outside the pre-defined range, varying the value of the bias voltage (20) to bring the output power back within the pre-defined range; and monitoring the optical input to the modulator and, if it has been disabled, maintaining the bias voltage (20) at its current level for a pre-determined length of time that is dependent upon how long the modulator has been operating at quadrature.

    摘要翻译： 用于控制提供给光学调制器的偏置电压（20）的方法和装置包括可被配置为通过施加偏置电压（20）而被偏置的可偏置部件，所述方法包括：提供调制器输出功率的目标; 向所述可偏压部件施加偏置所述可偏压部件的偏置电压（20），使得所述输出功率在所述目标的预定义范围内; 监测输出功率，并且如果确定调制器的输出功率超出预定义范围，则改变偏置电压（20）的值以使输出功率回到预定义的范围内; 以及监视到所述调制器的光输入，并且如果已被禁用，则将所述偏置电压（20）保持在其当前电平达预定时间长度，所述时间长度取决于所述调制器正在工作多长时间。

    OPTICAL TRANSMITTER AND METHOD FOR CONTROLLING THE SAME
    4.
    发明申请
    OPTICAL TRANSMITTER AND METHOD FOR CONTROLLING THE SAME 有权
    光传输器及其控制方法

    公开(公告)号：US20150050030A1

    公开(公告)日：2015-02-19

    申请号：US14387109

    申请日：2012-03-22

    申请人： Emmanuel Le Taillandier De Gabory

    发明人： Emmanuel Le Taillandier De Gabory

    IPC分类号： H04B10/564 ,  H04B10/516

    CPC分类号： H04B10/564 ,  H04B10/50595 ,  H04B10/516

    摘要： Since it is difficult to control correctly and optimally the DC biases of an IQ modulator driven with pre-equalized data, a method for controlling an optical transmitter according to an exemplary aspect of the invention includes the steps of (a) making direct current biases for driving children Mach-Zehnder modulators of an IQ modulator in the optical transmitter converge to values close to null driving points of the children Mach-Zehnder modulators, (b) driving the children Mach-Zehnder modulators with special driving data including a pair of training patterns between which there is a significant correlation, (c) scanning direct current biases for setting quadrature angle of the IQ modulator, (d) monitoring output of the IQ modulator during step (c), and (e) setting the direct current bias for setting quadrature angle on the basis of the driving data and monitored results in step (d).

    摘要翻译： 由于难以正确和最佳地控制由预均衡数据驱动的IQ调制器的DC偏置，根据本发明的示例性方面的用于控制光发射机的方法包括以下步骤：（a）制造直流偏置， 驾驶儿童在光发射机中的IQ调制器的Mach-Zehnder调制器收敛到接近于儿童Mach-Zehnder调制器的零驱动点的值，（b）驱动具有特殊驾驶数据的儿童Mach-Zehnder调制器，包括一对训练模式 其间存在显着的相关性，（c）扫描用于设置IQ调制器的正交角的直流偏置，（d）在步骤（c）期间监视IQ调制器的输出，以及（e）设置用于设置的直流偏置 基于驾驶数据的正交角度和步骤（d）中的监视结果。

    OPTICAL TRANSMITTER
    5.
    发明申请
    OPTICAL TRANSMITTER 审中-公开
    光学发射器

    公开(公告)号：US20120288284A1

    公开(公告)日：2012-11-15

    申请号：US13576276

    申请日：2010-02-25

    申请人： Tsuyoshi Yoshida ,  Takashi Sugihara

    发明人： Tsuyoshi Yoshida ,  Takashi Sugihara

    IPC分类号： H04B10/04

    CPC分类号： H04B10/50575 ,  H04B10/5053 ,  H04B10/50595

    摘要： An optical transmitter generating an arbitrary optical waveform including an analog optical waveform, which is capable of controlling a bias to a Null point easily. The optical transmitter modulates light from a light source by an optical modulator with use of a data sequence being an electric signal, to thereby generate the arbitrary optical waveform, and includes: a light intensity detector detecting intensity of output light of the optical modulator; a data signal generator generating the data sequence; an average modulation degree calculator calculating an average modulation degree of the data sequence based on the data sequence; and a bias controller performing bias control on the optical modulator based on the intensity of the output light detected by the light intensity detector and the average modulation degree of the data sequence calculated by the average modulation degree calculator.

    摘要翻译： 产生包括模拟光波形的任意光波形的光发射机，其能够容易地将偏压控制到空点。 光发射机通过光调制器利用作为电信号的数据序列来调制来自光源的光，从而产生任意的光波形，并且包括：光强检测器，检测光调制器的输出光的强度; 产生数据序列的数据信号发生器; 平均调制度计算器，基于所述数据序列计算所述数据序列的平均调制度; 以及偏置控制器，基于由光强度检测器检测的输出光的强度和由平均调制度计算器计算的数据序列的平均调制度，对光调制器进行偏置控制。

    Dynamic distortion control
    8.
    发明授权
    Dynamic distortion control 有权
    动态失真控制

    公开(公告)号：US06687466B1

    公开(公告)日：2004-02-03

    申请号：US09478644

    申请日：2000-01-06

    申请人： Joseph F. Chiappetta

    发明人： Joseph F. Chiappetta

    IPC分类号： H04B1004

    CPC分类号： H04B10/50595 ,  H04B10/504 ,  H04B10/505 ,  H04B10/50572 ,  H04B10/50575 ,  H04B10/50593 ,  H04B10/58

    摘要： A distortion monitor for a non-linear device is provided. The control circuit includes an input coupleable to receive a signal from the non-linear device and a first frequency monitor coupled to the input. The frequency monitor monitors the level of one of even and odd order distortion at a first frequency and creates a first signal indicative of the level of the distortion without the use of a pilot tone.

    摘要翻译： 提供了一种用于非线性设备的失真监视器。 所述控制电路包括可耦合以接收来自所述非线性装置的信号的输入端和耦合到所述输入端的第一频率监视器。 频率监视器以第一频率监视偶数和奇数阶失真之一的电平，并产生指示失真电平的第一信号，而不使用导频音。

    DUAL CLOSED LOOP FOR LASER POWER CONTROL
    9.
    发明申请
    DUAL CLOSED LOOP FOR LASER POWER CONTROL 审中-公开

    公开(公告)号：US20170288369A1

    公开(公告)日：2017-10-05

    申请号：US15477956

    申请日：2017-04-03

    申请人： MACOM Technology Solutions Holdings, Inc.

    发明人： Quazi Ikram ,  Cristiano Bazzani

    IPC分类号： H01S5/042 ,  H04B10/564 ,  H04B10/50 ,  H01S5/0683

    CPC分类号： H01S5/0427 ,  H01S5/0617 ,  H01S5/0683 ,  H04B10/503 ,  H04B10/50593 ,  H04B10/50595 ,  H04B10/564

    摘要： A power control system comprising a laser driver that receives a data signal, and responsive to a modulation control signal and a bias control signal, processes the data signal to drive a laser to generate an optic signal that represents the data signal. A monitor photodiode configured to receive the optic signal and generate a monitor photodiode signal.A modulation control path, that processes a monitor photodiode signal and a reference signal, including at least one filter and at least one mixer. The modulation control path generates a modulation control signal. A bias control path, that processes the monitor photodiode signal and the reference signal, that includes at least one filter and at least one average weighting module to generate a modulation control signal. The bias control path and the modulation control path processing reduces the effect of the error in the monitor photodiode signal.