公开(公告)号：US06944399B2

公开(公告)日：2005-09-13

申请号：US09939783

申请日：2001-08-28

申请人： Zhengchen Yu ,  William Shieh ,  Thomas R. Clark, Jr. ,  Vladimir Petricevic

发明人： Zhengchen Yu ,  William Shieh ,  Thomas R. Clark, Jr. ,  Vladimir Petricevic

IPC分类号： H04B10/17 ,  H04J14/02 ,  G02F1/00 ,  H04B10/08

CPC分类号： H04J14/0297 ,  H04B10/296 ,  H04J14/02 ,  H04J14/0221 ,  H04J14/0227 ,  H04J14/0246 ,  H04J14/0279 ,  H04J14/0289 ,  H04J14/0291 ,  H04J14/0294 ,  H04J14/0295

摘要： A method for maintaining amplifier saturation in a wavelength division multiplexed (WDM) optical network having a plurality of sub-bands, each sub-band including at least two signal channels which carry respective data signals, and a plurality of substitute signal transmitters, each substitute signal transmitter generating a substitute signal and corresponding to a respective one of the plurality of sub-bands, includes identifying signal channels having a predetermined characteristic within each of the plurality of sub-bands. A substitute signal transmitter is turned on if the sub-band corresponding to the substitute signal transmitter includes a predetermined number of signal channels having said predetermined characteristic. The data signals and the substitute signals are combined into a WDM signal, and the WDM signal is transmitted over an optical transmission fiber.

摘要翻译： 一种用于在具有多个子带的波分复用（WDM）光网络中保持放大器饱和的方法，每个子带包括携带相应数据信号的至少两个信号信道，以及多个替代信号发射机，每个替代 信号发生器生成替代信号并且对应于所述多个子带中的相应一个子带，包括识别在所述多个子带中的每一个子带内具有预定特性的信号信道。 如果对应于替代信号发射机的子带包括预定数量的具有所述预定特性的信道，则替代信号发射机被接通。 数据信号和替代信号被组合成WDM信号，WDM信号通过光传输光纤传输。

公开(公告)号：US06850677B2

公开(公告)日：2005-02-01

申请号：US10618071

申请日：2003-07-14

申请人： Michael L. Dennis ,  M. Imran Hayee ,  Cathal Mahon ,  Bo Pedersen ,  Nadakumar Ramanujam ,  William Shieh

发明人： Michael L. Dennis ,  M. Imran Hayee ,  Cathal Mahon ,  Bo Pedersen ,  Nadakumar Ramanujam ,  William Shieh

IPC分类号： H04B10/17 ,  H04B10/18 ,  G02B6/02

CPC分类号： H04B10/2916 ,  H04B10/25253 ,  H04B2210/003

摘要： A system and method of providing a transmission span for a telecommunications link based on a remote Er3+-doped fiber amplification scheme is provided, where a transmission span comprises first through third segments each respectively comprising first-third optical fibers having first-third fiber lengths and first-third physical properties. The first and third segments are optically coupled to opposing ends of the second segment. At least one of the first and third physical properties is different from the second physical property, where the first segment provides low nonlinearity, the third segment provides distributed gain, and the second segment compensates for the dispersion of the first and third segments. The span also includes a fourth optical fiber that is doped with a non-zero concentration of Er3+, and is disposed at a location in the span for remote pumping to provide discrete amplification of the optical signal. The location can be within the first segment, within the second segment, within the third segment, at an interface between the first and second segments, and/or at an interface between the second and the third segments.

摘要翻译： 提供了一种基于远程Er 3+掺杂光纤放大方案为电信链路提供传输跨度的系统和方法，其中传输跨度包括第一至第三段，每个段分别包括具有第一 - 第三纤维长度和第三物理性质。 第一和第三段光耦合到第二段的相对端。 第一和第三物理属性中的至少一个与第二物理属性不同，其中第一段提供低非线性，第三段提供分布增益，第二段补偿第一和第三段的分散。 该跨度还包括掺杂有非零浓度的Er 3+的第四光纤，并且设置在跨度的位置以进行远程泵浦以提供光信号的离散放大。 该位置可以在第一段内，第二段内，第三段内，第一段和第二段之间的界面处，和/或第二段和第三段之间的界面处。

公开(公告)号：US06687047B2

公开(公告)日：2004-02-03

申请号：US09865440

申请日：2001-05-29

申请人： Thomas Clark ,  William Shieh ,  Vladimir Petricevic

发明人： Thomas Clark ,  William Shieh ,  Vladimir Petricevic

IPC分类号： H04B1012

CPC分类号： H01S3/06754 ,  H01S3/094003 ,  H01S3/094096 ,  H01S3/302 ,  H01S2301/04

摘要： A pump assembly for an optical amplifier includes a plurality of pump radiation sources, each pump radiation source producing radiation at a respective one of a first number of pump wavelengths. A coupler is optically coupled to each of the plurality of pump radiation sources, receives each of the first number of pump wavelengths from the plurality of pump radiation sources, and outputs each of the first number of pump wavelengths to each one of a second number of outputs. The pump assembly also includes a plurality of pump signal combiners, each pump signal combiner optically coupled to a respective one of the second number of outputs of the coupler and receiving each of the first number of pump wavelengths output from the coupler. Each pump signal combiner placing each of the first number of pump wavelengths output from the coupler in co-propagation with a respective one of a plurality of data signals propagating on a respective one of a plurality of optical fibers.

摘要翻译： 用于光放大器的泵组件包括多个泵浦辐射源，每个泵浦辐射源产生在第一数量泵浦波长的相应一个处的辐射。 耦合器光耦合到多个泵浦辐射源中的每一个，从多个泵浦辐射源接收第一数量的泵浦波长中的每一个，并且将第一数量的泵浦波长中的每一个输出到第二数量 输出。 泵组件还包括多个泵浦信号组合器，每个泵浦信号组合器光耦合到耦合器的第二数量输出中的相应一个，并接收从耦合器输出的第一数量的泵浦波长的每一个。 每个泵浦信号组合器将从耦合器输出的第一数量的泵浦波长中的每一个与在多根光纤中的相应一根光纤上传播的多个数据信号中的相应一个共传播。

公开(公告)号：US06618195B2

公开(公告)日：2003-09-09

申请号：US09838218

申请日：2001-04-20

申请人： William Shieh ,  Vladimir Petricevic ,  Thomas Clark

发明人： William Shieh ,  Vladimir Petricevic ,  Thomas Clark

IPC分类号： H01S300

CPC分类号： H04B10/2918 ,  H01S3/094003 ,  H01S3/2383 ,  H04B10/2916

摘要： An optical amplifier. The amplifier includes a plurality of pump radiation sources, each pump radiation source adapted to produce radiation having a set of pump wavelengths and pump powers corresponding to the respective pump wavelengths, wherein at least one set is different from at least one other set. The amplifier also includes a plurality of pump radiation combiners and a coupler. The coupler is optically coupled to the outputs of the pump radiation combiners, receives the coupled radiation from the pump radiation combiners and outputs pump radiation profiles to respective coupler outputs. The amplifier also includes pump-signal combiners, each optically coupled to a respective coupler output of the coupler outputs, which are adapted to couple an optical signal with the respective pump radiation profiles.

摘要翻译： 光放大器。 放大器包括多个泵浦辐射源，每个泵浦辐射源适于产生具有一组泵浦波长和对应于相应泵波长的泵浦功率的辐射，其中至少一组与至少一个其它组不同。 放大器还包括多个泵浦辐射组合器和耦合器。 耦合器光耦合到泵浦辐射组合器的输出端，接收来自泵辐射组合器的耦合辐射，并将泵辐射剖面输出到相应的耦合器输出端。 放大器还包括泵信号组合器，每个光耦合到耦合器输出的相应耦合器输出端，这些耦合器输出适于将光信号与相应的泵辐射分布耦合。

公开(公告)号：US08699882B2

公开(公告)日：2014-04-15

申请号：US12684018

申请日：2010-01-07

申请人： William Shieh

发明人： William Shieh

IPC分类号： H04J14/00

CPC分类号： H04L25/0242 ,  H04L25/0224 ,  H04L27/2637 ,  H04L27/264 ,  H04L27/2653 ,  H04L27/2697

摘要： Methods and apparatus for generating and processing a signal are disclosed. The signal may comprise a plurality of mutually orthogonal subcarriers constituting a plurality of bands. The signal may be either an optical or a radio frequency signal.

摘要翻译： 公开了用于产生和处理信号的方法和装置。 信号可以包括构成多个频带的多个相互正交的子载波。 该信号可以是光学或射频信号。

公开(公告)号：US20100021163A1

公开(公告)日：2010-01-28

申请号：US12509371

申请日：2009-07-24

申请人： William Shieh

发明人： William Shieh

IPC分类号： H04J14/06

CPC分类号： H04J14/06 ,  H04B10/60 ,  H04B10/61 ,  H04B10/614 ,  H04B10/6162

摘要： A method comprising splitting a received optical signal into split optical signals, the split optical signals being at least initially orthogonally polarized, coherently detecting at least one of the split optical signals and generating an electrical signal indicative thereof, and processing said electrical signal, the processing being adapted for received optical signals with orthogonal frequency division multiplexing (OFDM) modulation. A transmission system, a transmitter and a receiver are also provided.

摘要翻译： 一种方法，包括将接收到的光信号分为分裂光信号，所述分离光信号至少初始正交极化，相干地检测分离光信号中的至少一个，并产生指示其的电信号，并处理所述电信号，处理 适用于具有正交频分复用（OFDM）调制的接收光信号。 还提供传输系统，发射机和接收机。

公开(公告)号：US06907195B2

公开(公告)日：2005-06-14

申请号：US09939784

申请日：2001-08-28

申请人： Zhengchen Yu ,  William Shieh ,  Thomas R. Clark, Jr. ,  Vladimir Petricevic

发明人： Zhengchen Yu ,  William Shieh ,  Thomas R. Clark, Jr. ,  Vladimir Petricevic

IPC分类号： H04B10/155 ,  H04J14/02 ,  G02F1/00

CPC分类号： H04J14/0221 ,  H04B10/506 ,  H04J14/02 ,  H04J14/0226 ,  H04J14/0246 ,  H04J14/0279 ,  H04J14/0297

摘要： A wavelength division multiplexed (WDM) optical network includes a plurality of optical transmitters, each optical transmitter generating a data signal sent over a respective one of a plurality of signal channels, the plurality of signal channels being divided into a number of sub-bands where each sub-band includes at least two signal channels, and a plurality of substitute signal transmitters, the number of substitute signal transmitters being equal to the number of sub-bands, each substitute signal transmitter generating a substitute signal which provides loading in a corresponding sub-band. The WDM optical network also includes a combining circuit which combines the data signals output from the plurality of optical transmitters and the substitute signals output from the plurality of substitute signal transmitters into a WDM signal, and an optical transmission fiber which receives the WDM signal from the combining circuit.

摘要翻译： 波分多路复用（WDM）光网络包括多个光发射机，每个光发射机产生通过多个信号信道中的相应一个发送的数据信号，所述多个信号信道被划分成多个子带， 每个子带包括至少两个信号信道和多个替代信号发射机，替代信号发射机的数目等于子带数，每个替代信号发射机产生替代信号，该替代信号提供相应子载波的加载 -带。 WDM光网络还包括组合电路，其将从多个光发射机输出的数据信号和从多个替代信号发射机输出的替代信号组合成WDM信号，以及光传输光纤，其从 组合电路。

公开(公告)号：US06384956B1

公开(公告)日：2002-05-07

申请号：US09497074

申请日：2000-02-02

申请人： William Shieh

发明人： William Shieh

IPC分类号： G02F103

CPC分类号： G02F1/0136 ,  G02F1/0353 ,  G02F2203/06

摘要： A reset-free polarization controller is presented for maintaining the polarization of an incident optical signal at a fixed and known value. At least 3 controllable quarter-wavelength plates are connected in cascade to an incident optical source having a variable polarization. Each quarter-wavelength plates varies the orientation of phase retardation along the optical wavepath. The dynamic realignment of the cascaded quarter-wavelength plates with respect to the varying input polarization maintains the polarization of the output optical signal at a fixed and known value.

摘要翻译： 提出了一种无复位偏振控制器，用于将入射光信号的极化保持在固定和已知的值。 至少3个可控四分之一波长板级联连接到具有可变偏振的入射光源。 每个四分之一波长板沿着光波路径改变相位延迟的方向。 级联四分之一波长板相对于变化的输入偏振的动态重新对准将输出光信号的极化保持在固定和已知的值。

公开(公告)号：US09762323B2

公开(公告)日：2017-09-12

申请号：US13635815

申请日：2011-03-17

申请人： William Shieh

发明人： William Shieh

IPC分类号： H04B10/50 ,  H04B10/00 ,  H04B10/07 ,  H04B10/2507 ,  H04L27/26 ,  H04B10/2543

CPC分类号： H04B10/2507 ,  H04B10/2543 ,  H04L27/2614 ,  Y02D30/30

摘要： A method (1200) of transmitting digital information via a nonlinear optical channel (722), comprises receiving (1202) data (702) comprising at least a portion of the digital information. A plurality of frequency domain symbols is generated (1204) from the data, and each symbol is assigned to one of a predetermined plural number of frequency sub-bands. Each sub-band may be processed separately (1206) to reduce a peak-to-average power ratio (PAPR) of a transmitted optical signal. The optical signal (12) is then generated (1208) comprising the plural number of sub-bands, and transmitted via the nonlinear optical channel (722). The plural number of frequency sub-bands is predetermined so as to reduce nonlinear optical distortion of the optical signal within the nonlinear optical channel relative to a corresponding single frequency band signal. A corresponding information-receiving method, a transmitter apparatus and a receiver apparatus are also disclosed.

公开(公告)号：US20120141138A1

公开(公告)日：2012-06-07

申请号：US12959874

申请日：2010-12-03

申请人： Qi YANG ,  Zhixue HE ,  Wu LIU ,  William SHIEH ,  Ivan B. DJORDJEVIC ,  Zhu YANG ,  Shaohua YU

发明人： Qi YANG ,  Zhixue HE ,  Wu LIU ,  William SHIEH ,  Ivan B. DJORDJEVIC ,  Zhu YANG ,  Shaohua YU

IPC分类号： H04B10/02 ,  H04B10/00

CPC分类号： H04L27/2096 ,  H04B10/548 ,  H04B10/611 ,  H04L1/0003 ,  H04L1/0057 ,  H04L27/223 ,  H04L27/2634 ,  H04L27/2697

摘要： The invention provides methods, devices and a system for recovering the corrupted subcarrier at the local oscillator (LO) frequency in coherent optical OFDM transmission. The method includes performing advanced coding on a data signal to obtain an encoded signal; performing high order modulation on the encoded signal to obtain a high-order-modulated signal; performing OFDM modulation on the high-order-modulated signal to obtain an electrical OFDM signal; and performing up-conversion on the electrical OFDM signal to obtain an optical OFDM signal to be output. The inventive technique of employing advanced coding with low rate combining with higher order modulation can be used to reduce the decoding bit error ratio (bit error rate) level, so that the LO subcarrier can be fully recovered while the bandwidth of the transmitted signal may be substantially the same as the existing optical OFDM system, and there is no need to add any feedback control module or feedback loop support or the like to the existing optical OFDM system, so that the complexity of the receiving side can be reduced.

摘要翻译： 本发明提供用于在相干光OFDM传输中恢复本地振荡器（LO）频率处的损坏子载波的方法，装置和系统。 该方法包括对数据信号执行高级编码以获得编码信号; 对编码信号执行高阶调制以获得高阶调制信号; 对高阶调制信号进行OFDM调制以获得电子OFDM信号; 并对电子OFDM信号执行上变频以获得要输出的光OFDM信号。 可以使用以较低速率组合高阶调制的高级编码的本发明技术来减少解码误码率（误码率）电平，使得LO子载波可以完全恢复，而发射信号的带宽可以是 与现有的光学OFDM系统基本相同，并且不需要向现有的光学OFDM系统添加任何反馈控制模块或反馈环路支持等，从而可以减少接收侧的复杂性。