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    BROADBAND OPTICAL PHASE DETECTION AND PHASE NOISE REMOVAL WITH AN OPTICAL RESONATOR
    1.
    发明公开
    BROADBAND OPTICAL PHASE DETECTION AND PHASE NOISE REMOVAL WITH AN OPTICAL RESONATOR 有权
    OPTISCHE BREITBAND-PHASENERKENNUNG UNDPHASENRAUSCHUNTERDRÜCKUNGMIT EINEM OPTISCHEN RESONATOR

    公开(公告)号：EP2628261A1

    公开(公告)日：2013-08-21

    申请号：EP11770752.1

    申请日：2011-10-13

    申请人： RWTH Aachen

    发明人： WITZENS, Jeremy

    IPC分类号： H04B10/148 ,  H04B10/155 ,  H01S5/00

    CPC分类号： H03L7/04 ,  H01S3/005 ,  H01S3/0085 ,  H04B10/58 ,  H04B10/60 ,  H04B10/615 ,  H04B10/67 ,  H04B10/697

    摘要： A phase noise detection apparatus comprises a laser beam, an optical resonator coupled thereto at a coupling point and a photodetector receiving light from the laser beam. The laser beam and the resonator coupled thereto convert phase noise of light transported by the laser beam prior to the coupling point into intensity noise of light transported by the laser beam thereafter. Intensity noise is converted into an electrical signal by the photodetector. The electrical signal is sent through a first signal path and a second signal path such that the first signal path transports a signal substantially proportional to the intensity noise, which is integrated in an integrator in the second path. Relative gain of the two signal paths can be adjusted and the overall gain of the signal path is preferably such that the optical phase modulator at least partially cancels said phase noise in the optical domain.

    摘要翻译： 相位噪声检测装置包括激光束，在耦合点耦合到其上的光学谐振器和接收来自激光束的光的光电检测器。 激光束和耦合到其上的谐振器将由耦合点之前由激光束传输的光的相位噪声转换成其后由激光束传输的光的强度噪声。 强度噪声由光电检测器转换成电信号。 电信号通过第一信号路径和第二信号路径被发送，使得第一信号路径传输与强度噪声基本成比例的信号，该强度噪声集成在第二路径中的积分器中。 可以调整两个信号路径的相对增益，并且信号路径的总体增益优选地使得光相位调制器至少部分地消除光域中的所述相位噪声。

    Polarization de-multiplex for multilevel signals
    2.
    发明公开
    Polarization de-multiplex for multilevel signals 有权
    多级信号的偏振解复用

    公开(公告)号：EP2487813A1

    公开(公告)日：2012-08-15

    申请号：EP11290070.9

    申请日：2011-02-01

    申请人： Alcatel Lucent

    发明人： Buchali, Fred

    IPC分类号： H04B10/148 ,  H04B10/158 ,  H04L25/03 ,  H04B10/18

    CPC分类号： H04B10/6971 ,  H04B10/25073 ,  H04B10/60 ,  H04L25/03

    摘要： The present document relates to optical transmission systems. In particular, the present document relates to a system and method for performing polarization de-multiplexing in optical polarization multiplexed transmission systems. An equalizing unit for an input signal is described, wherein the input signal has been amplitude and phase modulated using a modulation scheme, and transmitted over a transmission channel. The equalizing unit (125, 203, 204) comprises a filter (501) adapted to filter the input signal using one or more filter taps, thereby yielding an output signal; wherein the output signal comprises a plurality of output samples having a plurality of output amplitudes, respectively; and a filter adaption unit (502) adapted to determine a first deviation of the output amplitude of at least some of the plurality of output samples from a first threshold; determine a second deviation of the output amplitude of at least some of the plurality of output samples from a second threshold; wherein the second threshold is greater than the first threshold and wherein the first threshold and the second threshold are associated with a first constellation amplitude and second constellation amplitude of constellation points of the modulation scheme, respectively; and update the one or more filter taps based on the first and second deviations.

    摘要翻译： 本文件涉及光传输系统。 特别地，本文件涉及用于在光偏振复用传输系统中执行偏振解复用的系统和方法。 描述了用于输入信号的均衡单元，其中输入信号已经使用调制方案进行了幅度和相位调制，并且通过传输信道发送。 均衡单元（125,203,204）包括适于使用一个或多个滤波器抽头来过滤输入信号的滤波器（501），从而产生输出信号; 其中所述输出信号包括分别具有多个输出幅度的多个输出样本; 和滤波器适配单元（502），其适于确定所述多个输出采样中的至少一些输出采样的输出幅度与第一阈值的第一偏差; 确定所述多个输出采样中的至少一些的输出幅度与第二阈值的第二偏差; 其中所述第二阈值大于所述第一阈值，并且其中所述第一阈值和所述第二阈值分别与所述调制方案的星座点的第一星座振幅和第二星座振幅相关联; 并基于第一和第二偏差更新一个或多个滤波器抽头。

    COHERENT OPTICAL SYSTEM COMPRISING A TUNABLE LOCAL OSCILLATOR
    8.
    发明公开
    COHERENT OPTICAL SYSTEM COMPRISING A TUNABLE LOCAL OSCILLATOR 有权
    相干光系统，它具有调谐本地OSC INCLUDES

    公开(公告)号：EP2351265A1

    公开(公告)日：2011-08-03

    申请号：EP08874328.1

    申请日：2008-12-08

    申请人： Nokia Siemens Networks OY

    发明人： GOTTWALD, Erich ,  ROHDE, Harald ,  SMOLORZ, Sylvia

    IPC分类号： H04B10/148 ,  H01S5/14 ,  H04J14/02

    CPC分类号： H04J14/0282 ,  H04B10/60

    摘要： A method and an optical network component for data processing in an optical network are provided, wherein a first signal and a second signal are influenced by a tunable element, wherein the first signal is an incoming optical signal, wherein the second signal is a local oscillator signal generated by a laser and wherein said laser comprises an optical gain element that is tuned by the tunable element. Furthermore, a communication system is suggested comprising said optical network component, which can be associated with an ONU and/or with an OLT. Suitable for coherent Ultra-Dense Wavelength Division Multiplex (UDWDM) networks.

    Method and device for homodyne reception of an optical signal
    9.
    发明公开
    Method and device for homodyne reception of an optical signal 有权
    VERFAHREN UND VORRICHTUNG ZUM HOMODYNE-EMPFANG EINEN OPTISCHEN SIGNAL

    公开(公告)号：EP2337244A1

    公开(公告)日：2011-06-22

    申请号：EP10193549.2

    申请日：2010-12-02

    申请人： Alcatel Lucent

    发明人： Bertran Pardo, Oriol ,  Zami, Thierry

    IPC分类号： H04B10/148 ,  H01S3/106

    CPC分类号： H04B10/63 ,  H01S3/08036 ,  H01S5/14 ,  H04B10/60

    摘要： The present invention discloses a method for homodyne reception of an optical signal transmitted with a baseline optical signal delivered by a local oscillator whose wavelength is within a predefined interval around the wavelength of the transmitted optical signal in order to produce interference signals corresponding to a beat between the transmitted optical signal and the baseline signal and intended to be detected by photodiodes, wherein said local oscillator comprises a Fabry-Pérot laser cavity comprising a photorefractive holographic medium, said laser cavity being supplied by the transmitted optical signal whenever its wavelength varies so as to produce a baseline signal.

    摘要翻译： 本发明公开了一种用于本地振荡器传送的基准光信号发送的光信号的方法，该本地振荡器的波长在传输的光信号的波长周围的预定间隔内，以便产生对应于在 传输的光信号和基线信号，并且意图由光电二极管检测，其中所述本地振荡器包括包含光折射全息介质的法布里 - 珀罗激光腔，所述激光腔每当其波长变化时由透射光信号提供，以便 产生基线信号。