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    OPTICAL TRANSMISSION SYSTEM
    225.
    发明公开
    OPTICAL TRANSMISSION SYSTEM 有权
    选择ÜBERTRAGUNGSSYSTEM

    公开(公告)号：EP3043491A4

    公开(公告)日：2017-04-26

    申请号：EP14852459

    申请日：2014-09-11

    申请人： NIPPON TELEGRAPH & TELEPHONE

    发明人： MATSUDA TOSHIYA ,  HAMAOKA FUKUTARO ,  NAKA AKIRA ,  SAITO KOHEI

    IPC分类号： H04B10/61 ,  H04J11/00 ,  H04J14/00 ,  H04J14/02 ,  H04J14/04 ,  H04J14/06

    CPC分类号： H04J14/02 ,  H04B10/532 ,  H04B10/5561 ,  H04B10/6151 ,  H04B10/6161 ,  H04B10/6164 ,  H04B10/6165 ,  H04J14/06

    摘要： A receiver is configured to have two coherent receivers using two pieces of local oscillator of optical frequencies f11 and f12 close to optical frequency f1 of signal light, the two pieces of local oscillator being controlled to have a predetermined optical frequency spacing ”F, and a digital signal processor demodulating transmission data signal sequences based on outputs from the coherent receivers. When the frequency difference ”f1 of one of the two pieces of local oscillator from a virtual reference frequency f1' close to the optical frequency f1 of the signal light is set, the digital signal processor obtains the frequency difference ”f2 of the other of the two pieces of local oscillator by calculating ”f1 - ”F, inputs electric signals output from the two coherent receivers, and compensates the phase rotation caused in the electric signals by frequency differences ”f1 and ”f2.

    摘要翻译： 接收器被配置为具有两个相干接收器，其使用两个接近信号光的光频率f1的光频率f11和f12的本地振荡器，两个本地振荡器被控制为具有预定的光频率间隔“F” 数字信号处理器基于来自相干接收机的输出来解调传输数据信号序列。 当设置两个本地振荡器中的一个本地振荡器与信号光的光频率f1接近的虚拟基准频率f1'的频率差“f1时，数字信号处理器获得另一个本地振荡器的频率差”f2 两个本地振荡器通过计算“f1-”F，输入从两个相干接收机输出的电信号，并且通过频率差“f1和”f2补偿在电信号中引起的相位旋转。

    LIGHT COMMUNICATION SYSTEM, LIGHT RECEIVER, LIGHT RECEIVER CONTROL METHOD, AND NONTEMPORARY COMPUTER READABLE MEDIUM
    226.
    发明公开
    LIGHT COMMUNICATION SYSTEM, LIGHT RECEIVER, LIGHT RECEIVER CONTROL METHOD, AND NONTEMPORARY COMPUTER READABLE MEDIUM 审中-公开
    LICHTÜBERTRAGUNGSSYSTEM，LICHTEMPFÄNGER，LICHTEMPFÄNGERSTEUERUNGSVERFAHRENUNDNICHTTEMPORÄRESCOMPUTERLESBARES MEDIUM

    公开(公告)号：EP3021501A4

    公开(公告)日：2017-03-08

    申请号：EP14823778

    申请日：2014-05-26

    申请人： NEC CORP

    发明人： HARA YASUSHI

    IPC分类号： H04B10/61 ,  H04B10/2507 ,  H04B10/556 ,  H04L27/22

    CPC分类号： H04B10/2507 ,  H04B10/5561 ,  H04B10/612 ,  H04B10/614 ,  H04B10/616 ,  H04B10/6161 ,  H04L27/2096 ,  H04L27/3809

    摘要： Present invention provides an optical communication system that controls reception sensitivity of an optical receiver. The communication system(100) according to the present invention comprising: an optical transmitter(1) to which an transmission signal is input, and which modulates the transmission signal to an optical signal and transmits the optical signal; and an optical receiver(2) that receives the optical signal and demodulates the optical signal to an transmission signal. And the optical receiver(2) includes a photoelectric conversion means(10) for converting the optical signal into an analog electric signal, a conversion and demodulation means(25) for converting the analog electric signal into a digital signal and demodulating the signal to the transmission signal, and an amplitude control means(102) for controlling amplitude of the analog electric signal, and the amplitude control means(102) controls the amplitude of the analog electric signal in accordance with wavelength dispersion of the optical signal.

    摘要翻译： 本发明提供一种控制光接收机的接收灵敏度的光通信系统。 根据本发明的通信系统（100）包括：光发射机（1），传输信号被输入到其中，并将传输信号调制到光信号并传输光信号; 以及接收光信号并将光信号解调为传输信号的光接收器（2）。 光接收器（2）包括用于将光信号转换为模拟电信号的光电转换装置（10），用于将模拟电信号转换为数字信号并将信号解调为信号的转换和解调装置（25） 发送信号以及用于控制模拟电信号的振幅的振幅控制装置（102），振幅控制装置（102）根据光信号的波长色散来控制模拟电信号的振幅。

    OPTICAL TRANSMITTER
    228.
    发明公开
    OPTICAL TRANSMITTER 审中-公开
    光发送器

    公开(公告)号：EP2381592A4

    公开(公告)日：2017-01-04

    申请号：EP10731247

    申请日：2010-01-13

    申请人： MITSUBISHI ELECTRIC CORP

    发明人： SUGIHARA TAKASHI ,  KAMETANI SOICHIRO ,  MIZUOCHI TAKASHI ,  KONISHI YOSHIAKI

    IPC分类号： G02F1/01 ,  H04B10/516 ,  H04B10/50 ,  H04B10/54 ,  H04B10/548 ,  H04B10/556 ,  H04B10/588 ,  H04B10/60 ,  H04B10/61 ,  H04L27/36

    CPC分类号： H04L27/36 ,  H04B10/5053 ,  H04B10/5055 ,  H04B10/516

    摘要： Provided is an optical transmitter capable of lessening a processing load of multi-level modulation processing. The optical transmitter for converting an input data series which is an input electrical signal into an optical multi-level signal and for outputting the optical multi-level signal, includes: an LUT (2) in which data for executing optical multi-level modulation is stored and from which first modulation data and second modulation data are output based on the input data series; a DAC (5a) which converts the first modulation data by D/A conversion to generate a first multi-level signal; a DAC (5b) which converts the second modulation data by D/A conversion to generate a second multi-level signal; and a dual-electrode MZ modulator (8) which includes a first phase modulator (8a) for modulating light from a light source (7) in accordance with the first multi-level signal and a second phase modulator (8b) for modulating light from the light source in accordance with the second multi-level signal, and which combines an optical signal from the first phase modulator (8a) and an optical signal from the second phase modulator (8b) to output the optical multi-level signal.

    LIGHT RECEIVER
    229.
    发明公开
    LIGHT RECEIVER 审中-公开
    LICHTAUFNEHMER

    公开(公告)号：EP3107226A1

    公开(公告)日：2016-12-21

    申请号：EP14882708.2

    申请日：2014-02-13

    申请人： Mitsubishi Electric Corporation

    发明人： MIENO, Mitsuko ,  YOSHIDA, Tsuyoshi ,  SHINTAKU, Hiroaki ,  HAYASHI, Shusaku

    IPC分类号： H04B10/61 ,  H04B10/2507

    CPC分类号： H04B10/6165 ,  H04B10/07953 ,  H04B10/6164 ,  H04J14/02 ,  H04J14/06

    摘要： This invention discloses an optical receiver (14) provided with: a phase modulation unit (15) that generates local oscillation light and modulates a phase of the local oscillation light; a coherent detection unit (10) that causes a received optical signal and the local oscillation light phase-modulated by the phase modulation unit (15) to interfere and converts the optical signal to an electrical signal; a polarization separation/adaptive equalization unit (11) that performs polarization separation and adaptive equalization on the electrical signal after coherent detection; and decoding units (12, 13) that decode the polarization-separated electrical signals output from the polarization separation/adaptive equalization unit (11).

    摘要翻译： 本发明公开了一种光接收器（14），它具有：产生本地振荡光并调制本地振荡光的相位的相位调制单元（15）; 相干检测单元（10），其使接收到的光信号和由相位调制单元（15）相位调制的本地振荡光干涉并将光信号转换为电信号; 偏振分离/自适应均衡单元（11），其在相干检测之后对电信号进行偏振分离和自适应均衡; 以及解码从偏振分离/自适应均衡单元（11）输出的偏振分离电信号的解码单元（12,13）。

    METHOD FOR OPTIMIZING CLOCK RECOVERY PERFORMANCES AT A COHERENT OPTICAL RECEIVER OF AN OPTICAL WDM TRANSMISSION SYSTEM, RECEIVER ASSOCIATED
    230.
    发明公开
    METHOD FOR OPTIMIZING CLOCK RECOVERY PERFORMANCES AT A COHERENT OPTICAL RECEIVER OF AN OPTICAL WDM TRANSMISSION SYSTEM, RECEIVER ASSOCIATED 审中-公开
    法在合理卒中恢复服务于光WDM传输系统的相干光接收器，使Receiver

    公开(公告)号：EP3086502A1

    公开(公告)日：2016-10-26

    申请号：EP15164397.0

    申请日：2015-04-21

    申请人： ALCATEL LUCENT

    发明人： Dorize, Christian ,  Renaudier, Jeremie

    IPC分类号： H04L7/00 ,  H04L7/027 ,  H04B10/61 ,  H04J14/02 ,  H04J14/06 ,  H04B10/077

    CPC分类号： H04L7/0083 ,  H04B10/614 ,  H04B10/616 ,  H04L7/027 ,  H04L7/0335

    摘要： The invention relates to a method (Mth) for optimizing clock recovery performances at a coherent optical receiver (Rx) of an optical Wavelength Division Multiplexed transmission system, said method (Mth) comprising the following steps:
    - Sampling (Smp_Xp°Yp°), at a samples per symbol rate (xSPS), a pair of complex polarization signals (Xp°, Yp°) of a Polarization Division Multiplexed optical signal (Sg) received from a coherent optical transmitter at a symbol rate (SB), so as to obtain a pair of digital complex polarization signals (Xp, Yp)
    - Recovering (Rec_OSC) a receiver clock in the pair of digital complex polarization signals (Xp, Yp), using a clock recovery algorithm, at a clock rate equal to the sample per symbol rate (xSPS)
    - Calculating (Calc_Pst) a performance estimate (Pst) of said clock receiver recovery
    - If said performance estimate (Pst) is below a performance threshold (Thr), then :
    • replacing (Prgm_Alg) the clock recovery algorithm with a selected clock recovery algorithm, and
    • modifying (Mod_xSPS) the sample per symbol rate (xSPS) in accordance with a range of acceptable samples per symbol rates for the selected clock recovery algorithm

    - Reiterating the previous steps until the performance estimate (Pst) reaches the performance threshold (Thr).

    摘要翻译： 本发明涉及的方法（第M），用于在一个相干光接收器的光学波分复用传输系统的（Rx）的优化时钟恢复性能，所述方法（M th）时，包括以下步骤： - 采样（Smp_Xp°Y p°） 以每个码元速率的样品（的xSP），一对复极化信号的（XP°，Y p°）的偏振复用光信号的（SG）从相干光发射器接收以符号率（SB），以 获得的一对数字复极化信号的（XP，YP） - 恢复（Rec_OSC）在一对数字复极化信号（p，Y p）的接收机时钟，使用时钟恢复算法，在时钟速率等于由样品 符号率（的xSP） - 计算（Calc_Pst）性能估计所述时钟接收机恢复的（PST） - 如果所述性能估计（PST）低于性能阈值（THR），则：€¢替换（Prgm_Alg）时钟恢复算法 与所选择的时钟恢复 RY算法，和€¢改性（Mod_xSPS）在雅舞蹈每个符号速率（xSP运营商）将样品与一系列每个符号速率上可接受的样本选择的时钟恢复算法 - 达平顺评分先前的步骤直到性能估计（PST）的性能 阈值（THR）。