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    Phase shift keyed modulation of optical signal using chirp managed laser
    91.
    发明授权
    Phase shift keyed modulation of optical signal using chirp managed laser 有权
    使用啁啾管理激光器进行光信号的相移键控调制

    公开(公告)号：US08068742B2

    公开(公告)日：2011-11-29

    申请号：US12171201

    申请日：2008-07-10

    申请人： Christopher R. Cole ,  Daniel Mahgerefteh ,  The'Linh Nguyen ,  Andrew C. Singer ,  Naresh Ramnath Shanbhag

    发明人： Christopher R. Cole ,  Daniel Mahgerefteh ,  The'Linh Nguyen ,  Andrew C. Singer ,  Naresh Ramnath Shanbhag

    IPC分类号： H04B10/00

    CPC分类号： H04B10/58 ,  H04B10/40 ,  H04B10/532 ,  H04B10/5561 ,  H04B10/69

    摘要： A high-speed optical transmitter comprises multiple digital lanes that are provided to a bank of digital-to-analog converters. The analog signals are then used to Phase Shift Keyed (PSK) modulation using a Chirp Managed Laser (CML)-based transmitter, and potentially using dual polarization. A corresponding optical receiver receives the sequence of optical signals at a demodulator. For each polarization, the demodulator includes a corresponding demodulation channel that is configured to demodulate that polarization component of the optical signal into one or more signal components. Each of these signal components is converted into a corresponding digital signal using a corresponding analog-to-digital converter. In the case of higher-order PSK modulation (e.g., 8PSK or higher), for each polarization, the analog converter has a lower sampling rate than for QPSK modulation.

    摘要翻译： 高速光发射机包括提供给数模转换器组的多个数字通道。 然后使用基于啁啾管理激光（CML）的发射器将模拟信号用于相移键控（PSK）调制，并可能使用双极化。 相应的光接收机在解调器处接收光信号序列。 对于每个极化，解调器包括相应的解调信道，其被配置为将该光信号的偏振分量解调为一个或多个信号分量。 这些信号分量中的每一个都使用对应的模拟 - 数字转换器转换成相应的数字信号。 在高阶PSK调制（例如，8PSK或更高）的情况下，对于每个极化，模拟转换器具有比对QPSK调制低的采样率。

    Directly modulated laser with isolated modulated gain electrode for improved frequency modulation
    92.
    发明授权
    Directly modulated laser with isolated modulated gain electrode for improved frequency modulation 有权
    具有隔离调制增益电极的直接调制激光器，用于改进频率调制

    公开(公告)号：US07869473B2

    公开(公告)日：2011-01-11

    申请号：US12053344

    申请日：2008-03-21

    申请人： Xiong Ye ,  Hongmin Chen ,  Yasuhiro Matsui ,  Daniel Mahgerefteh

    发明人： Xiong Ye ,  Hongmin Chen ,  Yasuhiro Matsui ,  Daniel Mahgerefteh

    IPC分类号： H01S3/10

    CPC分类号： H01S5/06256 ,  H01S5/0427 ,  H01S5/06251

    摘要： A DBR laser, such as a semiconductor DBR laser is disclosed having improved frequency modulation performance. The laser includes a split gain electrode and a tuning electrode. A modulating current encoding a data signal is injected into a first section of the gain electrode whereas a substantially DC bias voltage is imposed on a second section of the gain electrode positioned between the first gain electrode and the tuning electrode. The first and second gain electrodes are electrically isolated from each other and the tuning electrode by a large isolation resistance. In some embodiments, the isolation resistance is generated by forming the electrodes on a P+ layer and removing portions of the P+ layer between adjacent electrodes. Capacitors may couple to one or both of the second gain electrode and the tuning electrode.

    摘要翻译： 公开了一种具有改进的频率调制性能的DBR激光器，例如半导体DBR激光器。 激光器包括分裂增益电极和调谐电极。 将编码数据信号的调制电流注入增益电极的第一部分，而将大体上的直流偏置电压施加在位于第一增益电极和调谐电极之间的增益电极的第二部分上。 第一和第二增益电极通过大的隔离电阻彼此电隔离和调谐电极。 在一些实施例中，通过在P +层上形成电极并去除相邻电极之间的P +层的部分来产生隔离电阻。 电容器可以耦合到第二增益电极和调谐电极中的一个或两个。

    Intra-Cavity Phase Modulated Laser Based on Intra-Cavity Depletion-Edge-Translation Lightwave Modulators
    94.
    发明申请
    Intra-Cavity Phase Modulated Laser Based on Intra-Cavity Depletion-Edge-Translation Lightwave Modulators 审中-公开
    基于腔内消耗 - 边缘平移光波调制器的腔内相位调制激光器

    公开(公告)号：US20090268765A1

    公开(公告)日：2009-10-29

    申请号：US12110572

    申请日：2008-04-28

    申请人： Daniel Mahgerefteh ,  Hongmin Chen ,  Yasuhiro Matsui

    发明人： Daniel Mahgerefteh ,  Hongmin Chen ,  Yasuhiro Matsui

    IPC分类号： H01S5/06

    CPC分类号： H01S5/0265 ,  H01S5/06246

    摘要： Use of depletion edge translation as an in cavity phase modulation mechanism in lasers. Aspects of the invention are especially relevant (without limitation) in transmitters for extended reach comprising an intra cavity phase and amplitude modulated laser for generation of a frequency modulated signal and a passive optical spectrum reshaper element, sometimes referred to as a chirp modulated laser. Such techniques may be carried out as disclose herein by adopting predetermined doping profiles and applying predetermined voltage to the laser cavity, and more preferably to a phase section in or adjoining the laser cavity.

    摘要翻译： 使用耗尽边缘平移作为激光器中的空腔相位调制机制。 本发明的各个方面在用于扩展到达的发射机中尤为重要（但不限于）包括用于产生频率调制信号的腔内相位和幅度调制激光器以及有时被称为啁啾调制激光器的无源光谱再生元件。 这样的技术可以如本文所公开的那样通过采用预定的掺杂分布和向激光器腔施加预定的电压，更优选地应用于激光腔中或邻近激光腔的相位部分来执行。

    Carrier suppression using adiabatic frequency modulation (AFM)
    97.
    发明申请
    Carrier suppression using adiabatic frequency modulation (AFM) 有权
    使用绝热频率调制（AFM）的载波抑制

    公开(公告)号：US20060002717A1

    公开(公告)日：2006-01-05

    申请号：US11037893

    申请日：2005-01-18

    申请人： Yasuhiro Matsui ,  Daniel Mahgerefteh

    发明人： Yasuhiro Matsui ,  Daniel Mahgerefteh

    IPC分类号： H04B10/04

    CPC分类号： H04B10/505 ,  H04B10/5165

    摘要： A method for suppression of the optical carrier of an optically modulated digital signal, comprising of the steps of: modulating the amplitude of an optical carrier with digital input data to generate an amplitude modulated optical signal; and modulating the frequency of the optical carrier of the resulting optical signal with the same digital input data. A fiber optic system comprising: an optical source adapted to produce an adiabatically chirped amplitude modulated optical signal; an optical fiber adapted to receive the optical signal; and an optical receiver; wherein the optical power of the signal launched into the fiber exceeds the stimulated Brillouin threshold of the transmission fiber for a single frequency, continuous wave signal. A system for suppression of the optical carrier of an optically modulated digital signal comprising: modulating the amplitude and the frequency of an optical carrier with digital input data to generate an amplitude and frequency modulated optical signal, whereby to limit the stimulated Brillouin scattering loss of a transmission fiber to a selected value.

    摘要翻译： 一种用于抑制光调制数字信号的光载波的方法，包括以下步骤：用数字输入数据调制光载波的振幅，以产生调幅光信号; 并用相同的数字输入数据调制所得光信号的光载波的频率。 一种光纤系统，包括：适于产生绝热啁啾的调幅光信号的光源; 适于接收光信号的光纤; 和光接收机; 其中发射到光纤中的信号的光功率超过单频连续波信号的传输光纤的受激布里渊阈值。 一种用于抑制光学调制数字信号的光载波的系统，包括：用数字输入数据调制光载波的幅度和频率，以产生幅度和频率调制的光信号，从而限制被调制的布里渊散射损耗 传输光纤到选定的值。