公开(公告)号：EP2637323A1

公开(公告)日：2013-09-11

申请号：EP11837706.8

申请日：2011-10-06

申请人： NEC Corporation

发明人： FUKUCHI, Kiyoshi

IPC分类号： H04B10/02 ,  H04B10/04 ,  H04B10/06 ,  H04B10/14 ,  H04B10/18 ,  H04B10/26 ,  H04B10/28

CPC分类号： H04B10/6163 ,  H04B10/6161 ,  H04B10/6165

摘要： A coherent light receiving device includes a coherent receiving unit which mixes a received optical signal with local light and performs optical coherent detection to output a digital signal, a wavelength dispersion compensation unit which compensates for waveform distortion in the digital signal and outputs a digital signal after compensation, and a frequency difference detection unit which detects the frequency difference between the received optical signal and local light and notifies the wavelength dispersion compensation unit of the frequency difference, wherein the wavelength dispersion compensation unit performs compensation using a transfer function which is based on the frequency difference notified from the frequency difference detection unit and represents waveform distortion due to wavelength dispersion.

摘要翻译： 相干光接收装置包括相干接收单元，其将接收到的光信号与本地光混合并执行光学相干检测以输出数字信号;波长色散补偿单元，其补偿数字信号中的波形失真，并在数字信号之后输出数字信号 补偿，以及频率差检测单元，其检测所接收的光信号和局部光之间的频率差，并将波长色散补偿单元通知该频率差，其中，所述波长色散补偿单元使用基于 由频率差检测单元通知的频率差异，并且表示由于波长色散引起的波形失真。

公开(公告)号：EP2541805A1

公开(公告)日：2013-01-02

申请号：EP10846061.9

申请日：2010-02-22

申请人： Mitsubishi Electric Corporation

发明人： HAYASHI, Shusaku ,  SHIMAKURA, Yasuhisa ,  SAWADA, Kazushige

IPC分类号： H04B10/04 ,  H04B10/06 ,  H04B10/14 ,  H04B10/26 ,  H04B10/28

CPC分类号： H04B10/50577 ,  H04B10/5051 ,  H04B10/516

摘要： An optical transmitter includes: a data generating unit (6) configured to generate a plurality of modulating signals; a driver (9) configured to amplify the plurality of modulating signals generated by the data generating unit (6); a phase shifter (7) configured to control a phase of at least one signal among the plurality of modulating signals to be input to the driver (9); a plurality of optical modulators (2) connected in series to each other, and configured to modulate an optical signal on a basis of each of the modulating signals amplified by the driver (9); an optical coupler (3) configured to branch the optical signal modulated by the optical modulator (2) arranged at a last stage in the series; a photodiode (4) configured to detect the optical signal branched by the optical coupler (2) and converts the optical signal into an electric signal; and a phase control unit (5a) configured to control an amount of phase control of the phase shifter (7) to maximize an intensity of the electric signal converted by the photodiode (4).

摘要翻译： 一种光发射器包括：数据生成单元（6），被配置为生成多个调制信号; 驱动器（9），其被配置为放大由所述数据生成单元（6）生成的所述多个调制信号; 移相器（7），其被配置为控制所述多个调制信号中的至少一个信号的相位以输入到所述驱动器（9）; 多个光调制器（2），彼此串联连接，并且被配置为基于由所述驱动器（9）放大的每个调制信号来调制光信号; 光耦合器（3），被配置为分支由布置在该系列中的最后一级的光调制器（2）调制的光信号; 光电二极管（4），被配置为检测由光耦合器（2）分支的光信号并将光信号转换为电信号; 以及相位控制单元（5a），被配置为控制移相器（7）的相位控制量，以使由光电二极管（4）转换的电信号的强度最大化。

公开(公告)号：EP2495889A1

公开(公告)日：2012-09-05

申请号：EP10826555.4

申请日：2010-10-19

申请人： Mitsubishi Electric Corporation

发明人： MIZUOCHI, Takashi ,  SUGIHARA, Takashi

IPC分类号： H04B10/02 ,  H04B10/04 ,  H04B10/06 ,  H04B10/14 ,  H04B10/18 ,  H04B10/26 ,  H04B10/28

CPC分类号： H04B10/25137 ,  H04B10/505 ,  H04B10/5162 ,  H04B2210/254

摘要： Provided is a pre-equalization optical transmitter capable of generating a pre-equalized RZ-type optical signal with a simple and low-cost structure. Further provided is a pre-equalization optical fiber transmission system in which dispersion is appropriately managed by using the pre-equalization optical transmitter. The pre-equalization optical transmitter includes: an RZ conversion circuit (11) for generating an RZ-type input data sequence based on an NRZ-type input data sequence (D (t)) and a clock (p (t)) that is twice the speed of the NRZ-type input data sequence; a digital filter (12) for generating pre-equalized data by a convolution operation between the RZ-type input data sequence and a desired transfer function corresponding to the wavelength dispersion of an optical fiber transmission path; D/A converters (13a, 13b) for performing D/A conversion on the pre-equalized data to output analog pre-equalized data; and a vector modulator (15) for modulating light from a laser light source (14) based on the analog pre-equalized data to output an RZ-type optical signal.

摘要翻译： 提供了能够以简单且低成本的结构生成预均衡的RZ型光信号的预均衡光发送机。 进一步提供一种预均衡光纤传输系统，其中通过使用预均衡光发射机适当地管理色散。 预均衡光发射机包括：RZ转换电路（11），用于基于NRZ型输入数据序列（D（t））和时钟（p（t））产生RZ型输入数据序列， NRZ型输入数据序列速度的两倍; 数字滤波器（12），用于通过RZ型输入数据序列与对应于光纤传输路径的波长色散的期望传输函数之间的卷积运算产生预均衡数据; D / A转换器（13a，13b），用于对预均衡数据执行D / A转换以输出模拟预均衡数据; 以及用于基于所述模拟预均衡数据调制来自激光源（14）的光的矢量调制器（15），以输出RZ型光信号。

公开(公告)号：EP2429108A1

公开(公告)日：2012-03-14

申请号：EP10772104.5

申请日：2010-04-21

申请人： NEC Corporation

发明人： YASUDA, Wakako ,  OGASAHARA, Daisaku ,  FUKUCHI, Kiyoshi

IPC分类号： H04J11/00 ,  H04B10/04 ,  H04B10/06 ,  H04B10/14 ,  H04B10/142 ,  H04B10/152 ,  H04B10/26 ,  H04B10/28

CPC分类号： H04B10/611 ,  H04B10/60 ,  H04B10/6166 ,  H04L27/223

摘要： A coherent receiver 1 assigns a first transmission signal to first transmission polarization, assigns a second transmission signal to second transmission polarization, and receives a quadrature multiplexed signal formed by applying quadrature multiplexing to the first transmission polarization and the second transmission polarization. The coherent receiver includes a detection means 10 for detecting the first transmission polarization and the second transmission polarization according to prescribed first reception polarization and second reception polarization and obtaining a first detected signal and a second detected signal; a quantization means 20 for quantizing the first detected signal and the second detected signal and obtaining a first quantized signal and a second quantized signal; and a signal processing means 30 for, when filtering the first quantized signal and the second quantized signal using a prescribed filtering control algorithm to form a first demodulated signal and a second demodulated signal respectively, adjusting filter coefficients of the filtering control algorithm according to the first quantized signal and the second quantized signal and the first demodulated signal and the second demodulated signal, and outputting the first demodulated signal and the second demodulated signal to a first output terminal and a second output terminal, respectively.

摘要翻译： 相干接收机1将第一传输信号分配给第一传输极化，将第二传输信号分配给第二传输偏振，并且接收通过对第一透射偏振和第二透射偏振应用正交多路复用形成的正交多路复用信号。 相干接收机包括检测装置10，用于根据规定的第一接收极化和第二接收极化检测第一透射偏振和第二透射偏振，并获得第一检测信号和第二检测信号; 量化装置20，用于量化第一检测信号和第二检测信号，并获得第一量化信号和第二量化信号; 以及信号处理装置30，用于当使用规定的滤波控制算法对第一量化信号和第二量化信号进行滤波以分别形成第一解调信号和第二解调信号时，根据第一信号调整滤波器控制算法的滤波器系数 量化信号和第二量化信号以及第一解调信号和第二解调信号，并将第一解调信号和第二解调信号分别输出到第一输出端和第二输出端。

公开(公告)号：EP2249492A1

公开(公告)日：2010-11-10

申请号：EP09711758.4

申请日：2009-02-20

申请人： Nippon Telegraph and Telephone Corporation ,  NTT Electronics Corporation

发明人： NAKAMURA, Hirotaka ,  KIMURA, Shunji ,  HARA, Kazutaka ,  KITAHARA, Koji

IPC分类号： H04B10/04 ,  G02F1/01 ,  H01S5/06 ,  H04B10/06 ,  H04B10/14 ,  H04B10/26 ,  H04B10/28

CPC分类号： H01S5/042 ,  G02F1/0123 ,  H01S5/0427

摘要： A modulation method according to the invention is applied to a modulation device in which a light source is driven by a differential signal while a modulation circuit and the light source are capacitively coupled. In the modulation method of the invention, when an average potential fluctuates at an input terminal of the light source, a potential fluctuation is externally provided using a control circuit such that a normal phase side and a reverse phase side become equal to each other in a time constant of the fluctuation in average potential, and transient states of the average potentials at the normal phase side and reverse phase side are equalized and cancel each other as in-phase components of a signal input to the light source, which allows an optical signal to be normally transmitted from the light source. The optical signal can normally be transmitted from the light source even before the average potentials at a normal phase input terminal and a reverse phase input terminal of the light source are stabilized.

摘要翻译： 根据本发明的调制方法被应用于其中在调制电路和光源电容耦合时由差分信号驱动光源的调制装置。 在本发明的调制方法中，当平均电位在光源的输入端波动时，使用控制电路外部提供电位波动，使得正常相位侧和反相侧在 平均电位波动的时间常数以及正相侧和反相侧的平均电位的过渡状态均衡并相互抵消，作为输入到光源的信号的同相分量，这允许光信号 从光源正常传输。 即使在光源的正相输入端子和反相输入端子的平均电位稳定之前，也可以从光源发送光信号。

公开(公告)号：EP2124356A1

公开(公告)日：2009-11-25

申请号：EP07832723.6

申请日：2007-11-29

申请人： NEC Corporation

发明人： SHIOIRI, Satomi ,  FUKUCHI, Kiyoshi

IPC分类号： H04B10/04 ,  H04B10/06 ,  H04B10/14 ,  H04B10/142 ,  H04B10/152 ,  H04B10/26 ,  H04B10/28 ,  H04L27/22

CPC分类号： H04B10/69 ,  H04B10/677 ,  H04L27/223

摘要： The present invention converts each of the optical differential signals from DPSK demodulator from an optical signal into an electrical signal by using optical-electrical signal converters. Thereafter, each electrical signal is subjected to amplification adjustment at an appropriate amplification factor by variable amplifier, and an appropriate delay amount is added to each electrical signal by variable delay line, and thereafter data discrimination is performed by discriminator. Since two differential signals after DPSK demodulation are subjected to amplitude and delay adjustments, the need for optical parts is obviated enabling the use of electric circuits which can be integrated. Thus, the cost of the optical reception device will be reduced. Moreover, the since electric signals whose phases and amplitudes are equalized are inputted to discriminator, erroneous determination of data at discriminator will be reduced.

摘要翻译： 本发明通过使用光电信号转换器将来自DPSK解调器的每个光差分信号从光信号转换成电信号。 此后，通过可变放大器以适当的放大系数对每个电信号进行放大调整，并通过可变延迟线将合适的延迟量加到每个电信号上，然后通过鉴别器进行数据鉴别。 由于在DPSK解调之后的两个差分信号经受幅度和延迟调整，所以无需使用可以集成的电路。 因此，光接收装置的成本将降低。 此外，由于相位和幅度均衡的电信号被输入到鉴别器，因此鉴别器上的数据的错误确定将被减少。

公开(公告)号：EP2025080A1

公开(公告)日：2009-02-18

申请号：EP07746726.4

申请日：2007-05-29

申请人： Luxpert Technologies Co., Ltd.

发明人： BYUN, Jae-Oh ,  SEO, Ji-Min

IPC分类号： H04B10/28

CPC分类号： H01S5/4006 ,  H01S5/0608 ,  H04B10/506 ,  H04J14/0254 ,  H04J14/0282

摘要： An injection seed of an injection locking type light source includes a broadband light source, a seed circulator receiving and transmitting a light from the light source to a seed optical filter passing only a desired wavelength band among the light beams from the light source and passing through the seed circulator, and an injection light source receiving a light beam of a specific wavelength band passing through the seed optical filter and outputting the wavelength-locked light beam without modulation to the seed optical filter at a predetermined power. The seed optical filter receives and outputs the wavelength-locked light beam from the injection light source to the seed circulator, and the seed circulator receives and outputs the wavelength- locked light beam as a seed beam injection locking type light source which of the noise can be minimized. Since noise signal of a seed beam is small, noise signal of a final transmitting beam is also small and preferable for the high speed communication.

公开(公告)号：EP2017980A1

公开(公告)日：2009-01-21

申请号：EP06732529.0

申请日：2006-05-11

申请人： Hitachi Communication Technologies, Ltd.

发明人： KIKUCHI, Nobuhiko

IPC分类号： H04B10/04 ,  H04B10/06 ,  H04B10/14 ,  H04B10/142 ,  H04B10/152 ,  H04B10/26 ,  H04B10/28

CPC分类号： H04B10/672 ,  H04B10/69 ,  H04L7/0008 ,  H04L7/0075

摘要： An optical field receiver comprises an optical branching circuit for branching a received optical multilevel signal into first and second optical signals, a first optical delayed demodulator for performing delayed demodulation on the first optical signal at a delay time T (T = symbol time), a second optical delayed demodulator for performing delayed demodulation on the second optical signal at the delay time T with an optical phase difference deviating from the first optical delayed demodulator by 90°, first and second optical receivers for converting each of the delayed demodulation signals representing x and y components of complex signals output from the first and second delayed demodulators into first and second electrical signals, and a field processing unit fort generating a first reconstructed signal representing an inter-symbol phase difference or a phase angle of a received symbol from the first and second electrical signals for each symbol time T.

摘要翻译： 一种光场接收机包括一个用于将接收的光多值信号分支为第一和第二光信号的光分支电路，用于在延迟时间T（T =符号时间）下对第一光信号执行延迟解调的第一光延迟解调器， 第二光延迟解调器，用于以延迟时间T对第二光信号执行延迟解调，光偏移与第一光延迟解调器相差90°;第一和第二光接收机，用于转换表示x和 从第一和第二延迟解调器输出的复数信号的y个分量转换成第一和第二电信号;以及场处理单元，其从第一和第二电信号产生表示接收符号的符号间相位差或相位角的第一重构信号， 每个符号时间T的第二个电信号。

公开(公告)号：EP1953931A1

公开(公告)日：2008-08-06

申请号：EP06756401.3

申请日：2006-05-19

申请人： NTT ELECTRONICS CORPORATION ,  NIPPON TELEGRAPH AND TELEPHONE CORPORATION

发明人： YONEYAMA, Mikio ,  SAITOU, Fumiaki ,  ONO, Shigeru ,  TAKEUCHI, Yosuke ,  YONENAGA, Kazushige ,  KUWAHARA, Shoichiro ,  YOSHIDA, Eiji ,  MIYAMOTO, Yutaka ,  KAWAKAMI, Hiroto

IPC分类号： H04B10/04 ,  G02F1/01 ,  H04B10/06 ,  H04B10/14 ,  H04B10/142 ,  H04B10/152 ,  H04B10/26 ,  H04B10/28 ,  H04L27/22

CPC分类号： H04L27/2071 ,  G02F1/0327 ,  H04B10/677 ,  H04L27/223

摘要： The present invention relates to an optical receiver, in which the transmittance of a Mach-Zehnder interferometer can be locked at a normal operation point in a simple structure and control.
A transmittance detecting circuit and a minute modulation signal detecting circuit are provided in parallel after a balanced optical receiver, and a switch is selectively connectable either a minute modulation signal detecting circuit and a transmittance detecting circuit. In the initial stage of frequency pull-in, the switch is set to connect the transmittance detecting circuit to the synchronous detection circuit. If the transmittance detecting circuit detects that the transmittance of the Mach-Zehnder interferometer at the carrier frequency becomes a desired transmittance, the connection of the switch is switched from the transmittance detecting circuit to the minute modulation signal detecting circuit.

摘要翻译： 本发明涉及一种光学接收器，其中Mach-Zehnder干涉仪的透射率可以在简单的结构和控制下被锁定在正常操作点。 在平衡式光接收器之后并联地提供透射率检测电路和微小调制信号检测电路，并且开关可选择性地连接微小调制信号检测电路和透射率检测电路。 在频率引入的初始阶段，开关设置为将透射率检测电路连接到同步检测电路。 如果透射率检测电路检测到在载波频率处Mach-Zehnder干涉仪的透射率变成期望的透射率，则开关的连接从透射率检测电路切换到微小调制信号检测电路。

公开(公告)号：EP1649617A4

公开(公告)日：2008-02-27

申请号：EP04777655

申请日：2004-06-30

申请人： FINISAR CORP

发明人： HOSKING LUCY G ,  STEWART JAMES ,  HO ANTHONY

IPC分类号： H04B10/04 ,  H04B10/24 ,  H04B10/00 ,  H04B10/02 ,  H04B10/06 ,  H04B10/08 ,  H04B10/14 ,  H04B10/26 ,  H04B10/28 ,  H05K20060101

CPC分类号： H04B10/6911 ,  H04B10/0799 ,  H04B10/40 ,  H04B2210/08

摘要： An optoelectronic transceiver includes first and second controller ICs. Each controller IC includes logic, a memory, an interface, and at least one input port. Each memory is configured to store digital diagnostic data and has a unique serial device address to allow a host access to each of these controller ICs separately and independently. At least some of the digital diagnostic data is common to both the first controller IC and the second controller IC. The inclusion of two controller ICs allows the same diagnostic data to be stored in completely different memory mapped locations. This allows hosts that are preconfigured differently to read different memory mapped locations on the different controller ICs to obtain the same diagnostic data.