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    Format insensitive and bit rate independent optical preprocessor
    4.
    发明授权
    Format insensitive and bit rate independent optical preprocessor 有权
    格式不敏感和比特率独立的光学预处理器

    公开(公告)号：US06727991B2

    公开(公告)日：2004-04-27

    申请号：US10195701

    申请日：2002-07-15

    申请人： Julio Martinez ,  Kwang Kim ,  Olga Nedzhvetskaya ,  Doruk Engin ,  Jiten Sarathy ,  Roman Antosik ,  Bharat Dave ,  Michael Evans ,  David Lidsky ,  Ronald Simprini ,  Boris Stefanov ,  Tan Thai

    发明人： Julio Martinez ,  Kwang Kim ,  Olga Nedzhvetskaya ,  Doruk Engin ,  Jiten Sarathy ,  Roman Antosik ,  Bharat Dave ,  Michael Evans ,  David Lidsky ,  Ronald Simprini ,  Boris Stefanov ,  Tan Thai

    IPC分类号： G01B902

    CPC分类号： H04B10/299 ,  H04L7/0075

    摘要： A method and circuit are presented for an all-optical format independent preprocessor that processes an arbitrary optical input signal by converting a NRZ signal to a PRZ signal, or if the input optical signal is RZ, by merely amplifying it. The method involves subtracting a delayed copy of the signal from the original, thereby effectively doubling its frequency, and inserting a pulse at each transition of the original signal, whether rising or falling. In a preferred embodiment this stage is implemented via an integrated SOA in each arm of an asymmetric interferometric device. The asymmetry consists of a delay element in one arm. In a preferred embodiment the entire device is fabricated on a semiconductor substrate, allowing for compactness as well as minimization of interconnectivity losses and overall power consumption. The output of the preprocessor, having a significant frequency component at its original clock rate, can then be fed to a clock recovery stage for all-optical clock recovery.

    摘要翻译： 提出了一种用于全光学格式独立预处理器的方法和电路，其通过仅将其放大来将NRZ信号转换为PRZ信号或者输入光信号是RZ来处理任意的光输入信号。 该方法包括从原始信号中减去信号的延迟副本，从而有效地使其频率加倍，并且在原始信号的每个转换处插入脉冲，无论是上升还是下降。 在优选实施例中，该阶段通过不对称干涉仪装置的每个臂中的集成SOA来实现。 不对称性由一个臂中的延迟元件组成。 在优选实施例中，整个器件制造在半导体衬底上，允许紧凑性以及最小化互连损耗和总功耗。 然后，具有其原始时钟速率的显着频率分量的预处理器的输出可以被馈送到用于全光时钟恢复的时钟恢复阶段。

    Bit-rate and format insensitive all-option clock extraction circuit
    6.
    发明授权
    Bit-rate and format insensitive all-option clock extraction circuit 有权
    比特率和格式不灵敏的全光时钟提取电路

    公开(公告)号：US06678086B2

    公开(公告)日：2004-01-13

    申请号：US10195766

    申请日：2002-07-15

    申请人： Bharat Dave ,  Doruk Engin ,  Kwang Kim ,  Mohammad Laham ,  Julio Martinez ,  Olga Nedzhvetskaya ,  Jithamithra Sarathy ,  Ronald Simprini ,  Boris Stefanov ,  Tan Buu Thai

    发明人： Bharat Dave ,  Doruk Engin ,  Kwang Kim ,  Mohammad Laham ,  Julio Martinez ,  Olga Nedzhvetskaya ,  Jithamithra Sarathy ,  Ronald Simprini ,  Boris Stefanov ,  Tan Buu Thai

    IPC分类号： G02F135

    CPC分类号： H04B10/299 ,  H04L7/0075

    摘要： A method and circuit are presented for the all optical recovery of the clock signal from an arbitrary optical data signal. The method involves two stages. A first stage preprocesses the optical signal by converting a NRZ signal to a PRZ signal, or if the input optical signal is RZ, by merely amplifying it. In a preferred embodiment this stage is implemented via an integrated SOA in each arm of an asymmetric interferometric device. The output of the preprocessing stage is fed to a clock recovery stage, which consists of a symmetric interferometer that locks on to the inherent clock signal by using the second stage input signal to trigger two optical sources to self oscillate at the clock rate. In a preferred embodiment the second stage is implemented via SOAs integrated in the arms of an interferometer, with two DFB lasers as terminuses. The output of the interferometer is an optical clock signal at the clock rate of the original input.

    摘要翻译： 提出了一种用于从任意光数据信号对时钟信号进行全光学恢复的方法和电路。 该方法涉及两个阶段。 第一级通过将NRZ信号转换为PRZ信号，或者如果输入光信号是RZ，则仅通过放大来预处理光信号。 在优选实施例中，该阶段通过不对称干涉仪装置的每个臂中的集成SOA来实现。 预处理阶段的输出被馈送到时钟恢复阶段，时钟恢复阶段包括通过使用第二级输入信号来锁定固有时钟信号的对称干涉仪，以触发两个光源以时钟速率自振荡。 在优选实施例中，第二级通过集成在干涉仪的臂中的SOA实现，其中两个DFB激光器作为终端。 干涉仪的输出是以原始输入的时钟速率的光时钟信号。