公开(公告)号：US09882644B2

公开(公告)日：2018-01-30

申请号：US14385155

申请日：2012-03-19

申请人： Filippo Ponzini ,  Fabio Cavaliere

发明人： Filippo Ponzini ,  Fabio Cavaliere

IPC分类号： H04B10/2575 ,  H04J14/02 ,  H04W88/08

CPC分类号： H04B10/25758 ,  H04B10/2575 ,  H04J14/02 ,  H04W88/085

摘要： A radio base station has a baseband controller coupled to a radio head by an optical wavelength division multiplexed link to pass downlink signals on a first wavelength, and uplink signals on another wavelength. A compensating delay is applied to one of the signals to compensate for a difference in transmission times between the downlink and the uplink signals. The compensating delay can be controlled according to the difference in wavelengths. By compensating for such differences in transmission times, synchronization problems can be avoided or ameliorated, or transmission distances can be increased. This can result in more flexibility in choice of wavelengths, fiber types and fiber lengths, and greater resilience. This can enable simpler installation or configuration, or reconfiguration without needing to take care to restrict the selection of wavelengths on the WDM link or restrict the length of the link for example.

公开(公告)号：US09806804B2

公开(公告)日：2017-10-31

申请号：US14407066

申请日：2012-07-02

申请人： Fabio Cavaliere

发明人： Fabio Cavaliere

IPC分类号： H04B10/07 ,  H04B10/079 ,  H04B10/516 ,  H04L1/00 ,  H04J14/02

CPC分类号： H04B10/07953 ,  H04B10/516 ,  H04J14/02 ,  H04L1/0009

摘要： An optical path for transmission of data from a source node to a destination node comprises an optical channel for parallel transmission of non overlapping carrier frequencies. The frequency separation of the carriers is lower than the baud rate. The optical path is configured by (a) determining a path OSNR (OSNRp ); (b) selecting a carrier bandwidth (BW) so that the channel bandwidth (BWT ) is less than or equal to a maximum path bandwidth available for transmission, wherein BWT≈BW·C, wherein C is the number of carrier frequencies; (c) selecting a FEC code having a minimum overhead requirement; (d) determining a channel OSNR (OSNRT ) based on the currently selected BW and FEC code; (e) in response to determining that OSNRT is not less than or equal to OSNRp, reselecting new codes having increasing overhead requirements until OSNRT is less than OSNRp, and if this is not possible increasing BWT and returning to step (c); (h) configuring the path for transmission based on the finally selected BWTand FEC code.

公开(公告)号：US20140376912A1

公开(公告)日：2014-12-25

申请号：US14131668

申请日：2011-07-08

申请人： Fabio Cavaliere ,  Emesto Ciaramella ,  Luca Giorgi ,  Marco Presi

发明人： Fabio Cavaliere ,  Emesto Ciaramella ,  Luca Giorgi ,  Marco Presi

IPC分类号： H04Q11/00 ,  H04L27/00 ,  H04J14/02

CPC分类号： H04Q11/0067 ,  H04B10/272 ,  H04J14/02 ,  H04J14/0246 ,  H04J14/025 ,  H04J14/0282 ,  H04J2014/0253 ,  H04L27/0008 ,  H04Q2011/0016 ,  H04Q2011/0086

摘要： An optical access network comprises an optical line terminal and an optical network unit having a transmitter. An optical path connects an output of the transmitter of the optical network unit to the optical line terminal. The transmitter of the optical network unit is arranged to transmit an upstream signal with an amplitude modulation format having at least one level transition per data bit period for at least one of the logical bits and a frequency modulation occurring with the level transition. An optical filter is positioned in the optical path. A central wavelength of a response of the optical filter has an offset with respect to a wavelength of the upstream signal. The wavelength of the upstream signal is located on a slope of the response of the optical filter.

摘要翻译： 光接入网络包括光线路终端和具有发射机的光网络单元。 光路将光网络单元的发射机的输出连接到光线路终端。 光网络单元的发射机被布置为以对于逻辑比特中的至少一个的数据比特周期具有至少一个电平转换的幅度调制格式发送上行信号，以及在电平转换中发生的频率调制。 光学滤光器位于光路中。 光滤波器的响应的中心波长相对于上游信号的波长具有偏移。 上游信号的波长位于光滤波器的响应的斜率上。

公开(公告)号：US08909048B2

公开(公告)日：2014-12-09

申请号：US13382762

申请日：2009-07-23

申请人： Marco Presi ,  Fabio Cavaliere ,  Andrea Chiuchiarelli ,  Pallab Choudhury ,  Ernesto Ciaramella ,  Giampiero Contestabile ,  Luca Giorgi ,  Roberto Proietti

发明人： Marco Presi ,  Fabio Cavaliere ,  Andrea Chiuchiarelli ,  Pallab Choudhury ,  Ernesto Ciaramella ,  Giampiero Contestabile ,  Luca Giorgi ,  Roberto Proietti

IPC分类号： H04J14/00 ,  H04B10/2587 ,  H04J14/02

CPC分类号： H04B10/2587 ,  H04J14/0282 ,  H04J2014/0253

摘要： A reflective optical network (10) comprises an optical network unit (14) and an optical receiver (22). The optical network unit (14) comprises a reflective optical modulator (16) arranged to receive a seed optical signal, and a transmitter controller (18) arranged to receive a data signal (20) and to control the modulator (16) to apply the data signal (20) to the seed optical signal, to form an optical data signal. The transmitter controller (18) is arranged to process the data signal (20) to substantially prevent the optical data signal comprising spectral components at frequencies lower than a cut-off frequency, being the frequency at which a power spectral density of said optical data signal is lower than a peak power spectral density of said optical signal by a cut-off power value. The optical receiver (22) comprises an electrical domain high pass filter (26) having a cut-off frequency higher than a linewidth of the seed optical signal.

摘要翻译： 反射光网络（10）包括光网络单元（14）和光接收器（22）。 光网络单元（14）包括布置成接收种子光信号的反射光调制器（16）和布置成接收数据信号（20）并且控制调制器（16）应用 数据信号（20）到种子光信号，以形成光数据信号。 发射机控制器（18）被布置成处理数据信号（20）以基本上防止包括频率低于截止频率的频谱分量的光数据信号，其是所述光数据信号的功率谱密度 通过截止功率值低于所述光信号的峰值功率谱密度。 光接收器（22）包括具有高于种子光信号的线宽的截止频率的电域高通滤波器（26）。

公开(公告)号：US08903253B2

公开(公告)日：2014-12-02

申请号：US13055126

申请日：2008-09-08

申请人： Marco Secondini ,  Fabio Cavaliere

发明人： Marco Secondini ,  Fabio Cavaliere

IPC分类号： H04B10/04 ,  G02F1/225 ,  H04B10/12 ,  H04L27/20 ,  H04B10/516 ,  H04B10/54 ,  H04B10/548

CPC分类号： H04B10/541 ,  G02F1/01 ,  H04B10/5161 ,  H04B10/548 ,  H04L27/2096 ,  H04L27/3488 ,  H04L27/36

摘要： A 2n-QAM (e.g. 16-QAM) optical modulator comprising cascaded I-Q modulators. The first I-Q modulator applies 2n−2 (e.g. 4) QAM to an optical signal, having a constellation diagram with the 2n−2 (e.g., 4) constellation points located in quadrant I. The second I-Q modulator subsequently applies a quaternary phase-shift keying (QPSK) modulation scheme to the optical signal, thereby rotating the constellation points of the 2n−2-QAM modulation scheme to quadrants II, III and IV, to produce a 2n-QAM modulation constellation diagram. The rotation causes the 2n-QAM modulator to inherently apply four quadrant differential encoding to the optical signal. A method of 2n-QAM optical modulation is also provided and optical signal transmission apparatus comprising the 2n-QAM optical modulator.

摘要翻译： 包含级联I-Q调制器的2n-QAM（例如16-QAM）光调制器。 第一IQ调制器将2n-2（例如4）QAM应用于具有位于象限I中的2n-2（例如，4））星座点的星座图的光信号。第二IQ调制器随后应用四相相移 键控（QPSK）调制方案，从而将2n-2-QAM调制方案的星座点旋转到象限II，III和IV，以产生2n-QAM调制星座图。 旋转使2n-QAM调制器固有地对光信号应用四象限差分编码。 还提供了一种2n-QAM光调制方法和包括2n-QAM光调制器的光信号传输装置。

公开(公告)号：US08861957B2

公开(公告)日：2014-10-14

申请号：US13695007

申请日：2010-04-28

申请人： Fabio Cavaliere ,  Luca Giorgi ,  Antonio D'Errico ,  Renato Grosso

发明人： Fabio Cavaliere ,  Luca Giorgi ,  Antonio D'Errico ,  Renato Grosso

IPC分类号： H04J14/00 ,  H04J14/02

CPC分类号： H04J14/0282 ,  H04J14/0202 ,  H04J14/0257 ,  H04J14/0267 ,  H04J14/0269

摘要： An optical access network comprises L wavelength division multiplexed access sub-networks. Each of the wavelength division multiplexed access sub-networks is arranged to use a set of wavelength channels. M optical line termination apparatus, each receive traffic from a respective operator network and output traffic on the wavelength channels. A wavelength routing apparatus comprises M sets of first ports and L second ports. Each set of first ports connects to a respective one of the optical line termination apparatus and each second port connects to an optical link of a respective one of the wavelength division multiplexed access sub-networks. The wavelength routing apparatus is arranged to route the set of wavelength channels between the sets of first ports and the second ports and to route different wavelength channels of the same wavelength to different ones of the second ports.

摘要翻译： 光接入网络包括L波分复用接入子网。 每个波分多路复用接入子网被配置为使用一组波长信道。 M光线路终端装置，各自从相应的运营商网络接收业务并在波长信道上输出业务。 波长路由装置包括M组第一端口和L个第二端口。 每组第一端口连接到光线路终端设备中的相应一个，并且每个第二端口连接到波分复用接入子网中相应一个的光链路。 波长路由设备被布置为在第一端口组和第二端口之间路由该组波长信道，并且将相同波长的不同波长信道路由到不同的第二端口。

公开(公告)号：US08478125B2

公开(公告)日：2013-07-02

申请号：US12600606

申请日：2008-04-24

申请人： Nicola Calabretta ,  Marco Presi ,  Giampiero Contestabile ,  Pierpaolo Ghiggino ,  Ernesto Ciaramella ,  Fabio Cavaliere ,  Roberto Proietti

发明人： Nicola Calabretta ,  Marco Presi ,  Giampiero Contestabile ,  Pierpaolo Ghiggino ,  Ernesto Ciaramella ,  Fabio Cavaliere ,  Roberto Proietti

IPC分类号： H04J14/00 ,  H04J14/02

CPC分类号： H04J14/0226 ,  H04B10/677 ,  H04J14/02 ,  H04J14/0246 ,  H04J14/0247 ,  H04J14/0252 ,  H04J14/0282 ,  H04J2014/0253 ,  H04Q11/0067 ,  H04Q2011/0086 ,  H04Q2011/009

摘要： An optical PON network comprises a central office which generates N DPSK modulated optical signals, where N is an integer greater than 1, an optical coupling which connects the N signals to at least one optical fiber, a passive distribution node located remotely from the central office which has at least one input port that is coupled to the fiber and a plurality of output ports, the node being arranged to transmit a first wavelength of the N signals to at least one of its output ports, and at least one optical network unit connected through a respective optical fiber to the first output port of the passive distribution node. The passive distribution node comprises an arrayed waveguide grating which provides a passive optical connection between its input port and the first output port and which for that connection functions as a bandpass filter having a profile and bandwidth selected such that the DPSK optical signal passed to the input node is converted to an intensity modulated signal at the output port.

摘要翻译： 光PON网络包括产生N个DPSK调制光信号的中心局，其中N是大于1的整数，将N个信号连接到至少一个光纤的光耦合器，远离中心局的被动分配节点 其具有耦合到光纤的至少一个输入端口和多个输出端口，所述节点被布置成将N个信号的第一波长发射到其输出端口中的至少一个，并且至少一个光网络单元连接 通过相应的光纤到被动分配节点的第一输出端口。 无源分布节点包括阵列波导光栅，其在其输入端口和第一输出端口之间提供无源光学连接，并且对于该连接起到带通滤波器的作用，该带通滤波器具有被选择的轮廓和带宽，使得DPSK光信号传递到输入端 节点在输出端口转换为强度调制信号。

公开(公告)号：US08457491B2

公开(公告)日：2013-06-04

申请号：US12741721

申请日：2007-11-06

申请人： Ernesto Ciaramella ,  Fabio Cavaliere ,  Giancarlo Gaimari ,  Emma Matarazzo ,  Stefano Brugioni ,  Luca Giorgi

发明人： Ernesto Ciaramella ,  Fabio Cavaliere ,  Giancarlo Gaimari ,  Emma Matarazzo ,  Stefano Brugioni ,  Luca Giorgi

IPC分类号： H04J14/00 ,  H04B17/00 ,  H04W52/32

CPC分类号： H04B17/0042 ,  H04B17/309 ,  H04J14/0213 ,  H04J14/0221 ,  H04J14/0257 ,  H04J14/0267 ,  H04J14/0271 ,  H04J14/0275 ,  H04W52/322 ,  H04W52/327

摘要： Methods and apparatus for determining transmission power of a plurality of optical channels for transmission of the channels along respective paths obtained through an optical transmission system. Information is obtained indicative of the path of each channel through the optical transmission system, and each channel is allocated to a group of channels in dependence upon the obtained information. A quality metric is determined for each group of channels, and a total transmission power for each group is determined in dependence upon the determined quality metric.

摘要翻译： 用于确定用于通过光传输系统获得的各个路径的信道传输的多个光信道的传输功率的方法和装置。 获得指示通过光传输系统的每个信道的路径的信息，并且根据获得的信息将每个信道分配给一组信道。 对于每组信道确定质量度量，并且根据确定的质量度量确定每个组的总发射功率。

公开(公告)号：US20130028598A1

公开(公告)日：2013-01-31

申请号：US13512724

申请日：2009-12-03

申请人： Fabio Cavaliere ,  Luca Giorgi ,  Renato Grosso ,  Ernesto Ciaramella

发明人： Fabio Cavaliere ,  Luca Giorgi ,  Renato Grosso ,  Ernesto Ciaramella

IPC分类号： H04B10/08

CPC分类号： H04J14/0227 ,  H04B10/071 ,  H04J14/0226 ,  H04J14/0246 ,  H04J14/025 ,  H04J14/0257 ,  H04J14/0265 ,  H04J14/0282

摘要： An optical network (1) comprising an optical network element (10) comprising a first optical transmitter (14), a first controller (16), a first optical receiver and a second optical receiver and a second optical network element (12). There is provided a transmission path (30) between said first optical network element and said second optical network element. Said first optical transmitter is arranged to generate and transmit a first optical signal. Said first controller is arranged to control said first optical transmitter to generate and transmit said first optical signal at a wavelength selected from a predetermined plurality of wavelengths. Said first optical receiver is arranged to detect a backscatter portion of said first optical signal returned to said first optical network element along said transmission path by distributing scattering.

摘要翻译： 一种包括光网络元件（10）的光网络（1），包括第一光发射器（14），第一控制器（16），第一光接收器和第二光接收器以及第二光网络元件（12）。 在所述第一光网络元件和所述第二光网络元件之间提供传输路径（30）。 所述第一光发射器被布置成产生和发射第一光信号。 所述第一控制器被布置成控制所述第一光发射机以从预定的多个波长中选择的波长产生和发射所述第一光信号。 所述第一光接收器被布置为通过分布散射来检测沿着所述传输路径返回到所述第一光网络元件的所述第一光信号的后向散射部分。

公开(公告)号：US20120033295A1

公开(公告)日：2012-02-09

申请号：US12994239

申请日：2010-05-11

申请人： Marco Presi ,  Ernesto Ciaramella ,  Fabio Cavaliere ,  Luca Banchi

发明人： Marco Presi ,  Ernesto Ciaramella ,  Fabio Cavaliere ,  Luca Banchi

IPC分类号： H01S5/20

CPC分类号： H04L27/2096 ,  H04B10/2587

摘要： An optical network unit (10) comprising a reflective semi-conductor optical amplifier (R-SOA) 12 and a driver 14. The R-SOA has a large optical confinement factor and is arranged to receive a portion of a downstream optical signal having a signal wavelength and a signal power. The driver is arranged to generate a drive signal 16 to drive the R-SOA. The drive signal is arranged to cause the R-SOA to operate in saturation at the signal power. The drive signal is further arranged to cause the R-SOA to apply a return-to-zero line code to said portion of the downstream optical signal to form an upstream optical signal at the signal wavelength. The drive signal is further arranged to cause the R-SOA to apply a phase modulation to the upstream optical signal.

摘要翻译： 一种包括反射半导体光放大器（R-SOA）12和驱动器14的光网络单元（10）.R-SOA具有较大的光限制因子，并且被布置为接收一部分具有 信号波长和信号功率。 驱动器被安排成产生驱动信号16以驱动R-SOA。 驱动信号被布置成使得R-SOA以信号功率工作在饱和状态。 驱动信号还被布置成使得R-SOA将归零线路码施加到下游光信号的所述部分，以在信号波长处形成上行光信号。 驱动信号进一步被布置成使得R-SOA对上游光信号施加相位调制。