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1. 发明公开

EP2975789A8 Optical transmitter 审中-公开
标题翻译：的光发射器
公开(公告)号：EP2975789A8
公开(公告)日：2016-02-24
申请号：EP14290219.6
申请日：2014-07-18
申请人： Alcatel Lucent
发明人： Ghazisaeidi, Amirhossein , Charlet, Gabriel , Salsi, Massimiliano
IPC分类号： H04B10/516 , H04J14/02
CPC分类号： H04B10/5162 , H04B10/508 , H04J14/0256
摘要： The present document relates to an optical transmitter (100, 300) for providing an optical signal according to a Wavelength Division Multiplex (WDM) grid with a WDM channel spacing to a dispersion managed optical link, the optical transmitter (100, 300) comprising:
- a digital signal processor (DSP) (110) for processing a sequence of digital data values, the DSP (110) being adapted to generate a Return-to-zero (RZ) pulse shaping for the sequence of digital data values by applying a digital pulse shaping filter (115) to thereby generate a pulse shaped sequence of data values;
- a digital to analog converter (DAC) (120) being adapted to generate an analog sequence of signal values based on the pulse shaped sequence of data values;
- an optical light source (150) for providing an optical signal; and
- an optical modulator (140) being adapted to modulate, at a symbol rate (B), the optical signal based on said analog sequence of signal values,

wherein the channel spacing of the WDM grid is greater than said symbol rate (B), and the digital pulse shaping filter (115) is adapted to increase the spectral bandwidth of the pulse shaped data values with respect to the Nyquist bandwidth corresponding to the symbol rate (B).

2. 发明授权

EP2114025B1 Optical receiving apparatus and optical communication system comprising it 有权
标题翻译：光接收装置和光通信系统，使得
公开(公告)号：EP2114025B1
公开(公告)日：2015-03-04
申请号：EP09168464.7
申请日：2005-12-29
申请人： FUJITSU LIMITED
发明人： Akiyama, Yuichi , Hoshida, Takeshi , Miura, Akira , Kai, Yutaka , Ooi, Hiroki , Rasmussen, Jens C. , Nakamura, Kentaro , Kuwata, Naoki , Nishizawa, Yoshinori , Takahara, Tomoo , Yuki, Masahiro
IPC分类号： H04B10/50 , H04B10/516 , H04B10/556 , H04B10/66 , H04B10/67 , G02F1/01 , G02F1/225
CPC分类号： G02F1/2255 , G02F1/0123 , H04B10/505 , H04B10/5051 , H04B10/5053 , H04B10/50575 , H04B10/50577 , H04B10/50595 , H04B10/5162 , H04B10/5165 , H04B10/5561 , H04B10/66 , H04B10/677

3. 发明公开

EP2840444A2 Apparatus and method for controlling an optical modulator 审中-公开
标题翻译：用于控制光调制器的设备和方法
公开(公告)号：EP2840444A2
公开(公告)日：2015-02-25
申请号：EP14189057.4
申请日：2004-03-16
申请人： FUJITSU LIMITED
发明人： Akiyama, Yuichi , Ooi, Hiroki
IPC分类号： G02F1/225 , G02F1/03
CPC分类号： H04B10/50597 , G02F1/0121 , G02F1/0123 , G02F1/225 , G02F2201/16 , H04B10/5051 , H04B10/50575 , H04B10/50577 , H04B10/5162 , H04B10/58
摘要： There is provided a control apparatus for an optical modulator, the optical modulator comprising: a first modulation section (10) configured to modulate light with a data signal (DATA) to generate a modulated signal light; and a second modulation section (20) connected to the first modulation section (10) in series. The second modulation section (20) includes a first electrode (20A) and a second electrode (20B) respectively provided drive signals (CLK1, CLK2) to drive the second modulation section (20). The control apparatus comprises: a drive section (11, 21, 23, 25, 25A, 25B) configured to provide the data signal (DATA) to the first modulation section (10), and to provide the drive signals (CLK1, CLK2) to the first and second electrodes (20A, 20B) of the second modulation section (20), respectively; an output monitoring section (40) configured to photoelectrically convert a signal light outputted from said optical modulator to detect an electric spectrum, and to detect the intensity of a specific frequency component from the detected electric spectrum, the intensity being changed most largely corresponding to a relative phase difference between the data signal (DATA) and one of the drive signals (CLK1, CLK2); and a control section (50) configured to detect the relative phase difference based on the detected intensity, and to adjust the relative phase difference between the data signal (DATA) and one of the drive signals (CLK1, CLK2) so as to maximize the detected intensity..
摘要翻译：提供了一种用于光调制器的控制装置，所述光调制器包括：第一调制部分（10），其被配置为用数据信号（DATA）调制光以生成调制信号光; 以及串联连接到第一调制部分（10）的第二调制部分（20）。第二调制部分20包括分别提供驱动信号（CLK1，CLK2）以驱动第二调制部分（20）的第一电极（20A）和第二电极（20B）。该控制装置包括：配置为向第一调制部分（10）提供数据信号（DATA）并提供驱动信号（CLK1，CLK2）的驱动部分（11,21,23,25,25A，25B）分别与第二调制部分（20）的第一和第二电极（20A，20B）相连; 输出监视部（40），其对从所述光调制器输出的信号光进行光电转换并检测电谱，根据检测出的电谱检测特定频率成分的强度，该强度最大地对应于数据信号（DATA）与其中一个驱动信号（CLK1，CLK2）之间的相对相位差; 和控制部分（50），其被配置为基于检测到的强度来检测相对相位差，并且调整数据信号（DATA）与驱动信号（CLK1，CLK2）中的一个之间的相对相位差以使检测强度..

4. 发明公开

EP2770649A1 PRE-EQUALIZED OPTICAL TRANSMITTER AND PRE-EQUALIZED OPTICAL TRANSMISSION METHOD 有权
标题翻译： VORENTZERRTER光发射机及方法预均衡光传输
公开(公告)号：EP2770649A1
公开(公告)日：2014-08-27
申请号：EP12842290.4
申请日：2012-10-17
申请人： Mitsubishi Electric Corporation
发明人： FUJIMORI, Takafumi , SUGIHARA, Takashi
IPC分类号： H04B10/2513 , H04B10/516
CPC分类号： H04B10/516 , H04B10/2513 , H04B10/50572 , H04B10/5161 , H04B10/5162 , H04B2210/254
摘要： A pre-equalization optical transmitter includes: a tap coefficient selecting unit (2) for saving, in advance, a tap coefficients for generating an RZ pre-equalization signal and an NRZ pre-equalization signal, and for selecting and outputting one of the tap coefficients according to the value of a parameter that is a factor of transmission power fluctuations; a pre-equalization signal generating unit (1) for generating the RZ pre-equalization signal or the NRZ pre-equalization signal based on the tap coefficient; and a modulating unit (8) for generating a pre-equalization optical transmission signal by modulating an optical signal input from a light source (7) by using a signal obtained through D/A conversion and amplification of the RZ pre-equalization signal or the NRZ pre-equalization signal, wherein a transmission method is switched between an RZ method and NRZ method by switching the tap coefficients by the tap coefficient selecting unit (2).
摘要翻译： A-预均衡光发送器包括：抽头系数选择单元（2），用于保存，提前，一个抽头系数在RZ预均衡信号和NRZ预均衡信号，并且用于抽头的选择和输出廷一个来生成系数gemäß一个参数的值确实是发送功率的波动的因素; 预均衡信号生成部（1），用于产生预均衡信号RZ或NRZ基于所述抽头系数的预均衡信号的装置; 和调制单元（8），用于通过使用通过RZ预均衡信号或的D / A转换和放大后的信号通过来自光源（7）的光信号输入的调制产生预均衡光传输信号 NRZ预均衡信号，worin的发送方法是通过由抽头系数选择单元切换的抽头系数在RZ方法和NRZ方法之间切换（2）。

5. 发明公开

EP2661827A1 APPARATUS AND METHOD FOR GENERATING INTERLEAVED RETURN-TO-ZERO (IRZ) POLARIZATION-DIVISION MULTIPLEXED (PDM) SIGNALS 有权转让
标题翻译： DEVICE AND的生成方法嵌套RETURN-TO-ZERO和偏振插值MULTIPLEX SIGNALS
公开(公告)号：EP2661827A1
公开(公告)日：2013-11-13
申请号：EP12701196.3
申请日：2012-01-05
申请人： Alcatel Lucent
发明人： LIU, Xiang , SETHUMADHAVAN, Chandrasekhar
IPC分类号： H04B10/155
CPC分类号： H04B10/532 , H04B10/5053 , H04B10/5055 , H04B10/508 , H04B10/5162 , H04B10/5561
摘要： Return To Zero (RZ) shaping is performed for a first I/Q modulator whose output corresponds to a first polarization component using a first two digital-to-analog converters (DACs), each of which is sampled at approximately twice a modulation symbol rate or more and has an output with a first interleaving order that interleaves one of a first pair of intended drive signal patterns and zeros. RZ shaping is also performed for a second I/Q modulator whose output corresponds to a second polarization component using a second two DACs, each sampled at approximately twice the modulation symbol rate or more and having a second interleaving order that interleaves zeros and one of a second pair of intended drive signal patterns, the second interleaving order opposite the first interleaving order. The first polarization and the second polarization may be combined, thereby forming an Interleaved Return To Zero (IRZ) Polarization Division Multiplexed (PDM) signal.

6. 发明授权

EP2175574B1 Transmission system comprising a CS-RZ DPSK optical transmitter 有权
标题翻译：用CS-RZ DPSK光发射机的光传输系统
公开(公告)号：EP2175574B1
公开(公告)日：2012-12-12
申请号：EP10152077.3
申请日：2002-06-28
申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION
发明人： Miyamoto, Yutaka , Hirano, Akira , Kuwahara, Shoichiro , Tomizawa, Masahito
IPC分类号： H04B10/155 , H04B10/158 , H04J14/02
CPC分类号： H04B10/5561 , H04B10/5051 , H04B10/5055 , H04B10/516 , H04B10/5162 , H04B10/677 , H04B2210/517 , H04J14/0227 , H04J14/0246 , H04J14/0279

7. 发明授权

EP1851882B1 SYSTEM AND METHOD FOR GENERATING OPTICAL RETURN-TO-ZERO SIGNALS WITH DIFFERENTIAL BI-PHASE SHIFT 有权
标题翻译：系统和方法生产光学返回到零的信号，差分BIPHASENVERSCHIEBUNG
公开(公告)号：EP1851882B1
公开(公告)日：2012-07-11
申请号：EP06705681.2
申请日：2006-02-23
申请人： Huawei Technologies Co., Ltd.
发明人： BAI, Yusheng
IPC分类号： H04B10/00 , H04J14/02
CPC分类号： H04B10/5162 , H04B10/505 , H04B10/5051 , H04B10/5055 , H04B10/508
摘要： A system and method for generating an optical return-to-zero signal. The system includes an electro-optical conversion system. The electro-optical conversion system is configured to receive an input electrical non-return-to-zero signal, process information associated with the input electrical non-return-to-zero signal, and generate a first electrical signal and a second electrical signal based on at least information associated with the input electrical non-return-to-zero signal. Additionally, the electro-optical conversion system is configured to delay a second electrical signal with respect to the first electrical signal by a predetermined period of time, process information associated with the first electrical signal and the delayed second electrical signal, and generate an output optical return-to-zero signal based on at least information associated with the first electrical signal and the delayed second electrical signal. The output optical return-to-zero signal is an optical differential return-to-zero signal, and the output optical return-to-zero signal is substantially free from any frequency chirp.

8. 发明公开

EP2296298A4 METHOD AND DEVICE FOR GENERATING OPTICAL SIGNAL 审中-公开
标题翻译：方法和一种用于产生光信号的
公开(公告)号：EP2296298A4
公开(公告)日：2012-02-22
申请号：EP09765345
申请日：2009-04-15
申请人： HUAWEI TECH CO LTD
发明人： YU DEZHONG , QI MING
IPC分类号： H04B10/50 , H04B10/516 , H04B10/556
CPC分类号： H04B10/5561 , H04B10/5051 , H04B10/5053 , H04B10/5162 , H04B2210/517

9. 发明公开

EP2247005A2 Optical receiving apparatus and optical communication system comprising it 审中-公开
标题翻译： Optische Empfangsvorrichtung undzugehörigesoptisches Kommunikationssystem
公开(公告)号：EP2247005A2
公开(公告)日：2010-11-03
申请号：EP10153294.3
申请日：2005-12-29
申请人： FUJITSU LIMITED
发明人： Akiyama, Yuichi , Hoshida, Takeshi , Miura, Akira , Kai, Yutaka , Ooi, Hiroki , Rasmussen, Jens C. , Nakamura, Kentaro , Kuwata, Naoki , Nishizawa, Yoshinori , Takahara, Tomoo , Yuki, Masahiro
IPC分类号： H04B10/158
CPC分类号： G02F1/2255 , G02F1/0123 , H04B10/505 , H04B10/5051 , H04B10/5053 , H04B10/50575 , H04B10/50577 , H04B10/50595 , H04B10/5162 , H04B10/5165 , H04B10/5561 , H04B10/66 , H04B10/677
摘要： A phase shift unit (12) provides a prescribed phase difference (π/2, for example) between a pair of optical signals transmitted via a pair of arms constituting a data modulation unit (20). A low-frequency signal f 0 is superimposed on one of the optical signals. A signal of which phase is shifted by π/2 from the low-frequency signal f 0 is superimposed on the other optical signal. A pair of the optical signals is coupled, and a part of which is converted into an electrical signal by a photodiode (3). 2f 0 component contained in the electrical signal is extracted. Bias voltage provided to the phase shift unit (12) is controlled by feedback control so that the 2f 0 component becomes the minimum.
摘要翻译：相移单元（12）在经由构成数据调制单元（20）的一对臂发送的一对光信号之间提供规定的相位差（例如，±2）。低频信号f 0叠加在一个光信号上。相位偏离低频信号f 0的信号被叠加在另一个光信号上。一对光信号被耦合，其一部分由光电二极管（3）转换成电信号。提取包含在电信号中的2f 0分量。通过反馈控制来控制提供给相移单元（12）的偏压，使得2f 0分量成为最小。

10. 发明公开

EP2157711A1 OPTICAL TRANSMISSION SYSTEM, APPARATUS AND METHOD 审中-公开
标题翻译：光传输系统，装置和方法
公开(公告)号：EP2157711A1
公开(公告)日：2010-02-24
申请号：EP08861711.3
申请日：2008-12-09
申请人： Huawei Technologies Co., Ltd.
发明人： YANG, Yanfu , XU, Xiaogeng
IPC分类号： H04B10/02
CPC分类号： H04J14/08 , H04B10/505 , H04B10/5162 , H04B10/5561 , H04B10/677
摘要： An optical transmission system, an optical transmitting apparatus, an optical transmitting method, an optical receiving apparatus, and an optical receiving method are provided, which belong to an optical communication field. The system includes a transmitting end apparatus and a receiving end apparatus. The optical transmitting apparatus includes a pre-coding module, a multiplexing module, and a modulating module. The optical receiving apparatus includes a demodulating module and a converting module. The optical transmitting method includes the following steps: performing pre-coding, multiplexing, and modulation for a signal to be transmitted, and then outputting the signal. The optical receiving method includes the following steps: receiving an optical signal of a transmitted signal; demodulating the optical signal according to a preset time delay, where the preset time delay equals to a product of a number of branches multiplexed by a transmitting apparatus and an element period of a signal multiplexed by the transmitting apparatus; converting the demodulated optical signal into an electrical signal; and obtaining information of the transmitted signal according to the electrical signal. Thus, the existing low-speed parts are adopted to realize a high-speed pre-coding function in a high-speed optical transmission system, and an extended time delay is used in the demodulation, thereby reducing the cost and difficulty to realize the system.
摘要翻译：提供属于光通信领域的光传输系统，光发送装置，光发送方法，光接收装置以及光接收方法。该系统包括发送端装置和接收端装置。该光发射装置包括预编码模块，复用模块和调制模块。光接收装置包括解调模块和转换模块。该光发送方法包括以下步骤：对待发送信号进行预编码，复用和调制，然后输出该信号。该光接收方法包括以下步骤：接收发射信号的光信号; 根据预设的时延对所述光信号进行解调，所述预设的时延等于发射装置复用的支路个数与所述发射装置复用的信号的单元周期的乘积; 将解调的光信号转换成电信号; 并根据该电信号获取传输信号的信息。因此，采用现有的低速部件来实现高速光传输系统中的高速预编码功能，并且在解调中使用延长的时间延迟，从而降低了实现系统的成本和难度。

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