公开(公告)号：WO2013127888A1

公开(公告)日：2013-09-06

申请号：PCT/EP2013/053982

申请日：2013-02-27

Applicant: ALCATEL-LUCENT ITALIA S.P.A. ,  POLITECNICO DI MILANO

Inventor： MARTINELLI, Mario ,  MARAZZI, Lucia ,  PAROLARI, Paola ,  GAVIOLI, Giancarlo

IPC: H04J14/02 ,  H04B10/2587 ,  H04B10/272

CPC classification number: H04B10/272 ,  H04B10/2587 ,  H04J14/0246 ,  H04J14/025 ,  H04J14/0265 ,  H04J14/0282

Abstract: An optical signal is generated by an SOA and then modulated by an optical amplitude modulation device. The signal is transmitted into a first end of an optical transmission line with a first polarization state. A fraction of the optical signal is re-transmitted into the other end of the transmission line, such that when it has at the other end a polarization state orthogonal to the polarization state of the signal fraction present at the other end. The re-transmitted signal, when having at the first end a polarization state orthogonal to the first polarization state, is guided from the first end to the SOA, next to the modulation device and then to the first end without passing the SOA again, using a polarizing beam splitter and a polarization device. The SOA is operated in a gain saturation state, such that an amplitude modulation of the re-transmitted optical signal is cancelled.

Abstract translation: 光信号由SOA生成，然后由光幅度调制装置调制。 信号被传送到具有第一偏振状态的光传输线的第一端。 光信号的一部分被重新传输到传输线的另一端，使得当另一端具有与另一端存在的信号级分的极化状态正交的极化状态时。 当在第一端处具有与第一极化状态正交的极化状态时，重新发送的信号从第一端引导到SOA，紧邻调制装置，然后再到第一端，而不再次通过SOA，使用 偏振分束器和偏振装置。 SOA在增益饱和状态下运行，使得重新发送的光信号的幅度调制被消除。

公开(公告)号：WO2018001595A1

公开(公告)日：2018-01-04

申请号：PCT/EP2017/059393

申请日：2017-04-20

Applicant: ALCATEL LUCENT

Inventor： RAZZETTI, Luca ,  GAVIOLI, Giancarlo ,  COSTANTINI, Carlo ,  CATTANEO, Davide

IPC: H03M13/11

Abstract: The application is related to a forward error correction mechanism in an optical coherent communication system (CS) comprising a FEC encoder (FE) and a FEC decoder (FD) on the basis of a low density parity check, LDPC, code. The FEC encoder encodes blocks of client bits into codewords by adding parity bits calculated by applying a FEC code to the client bits. Besides, the FEC decoder decodes each codeword by applying thereto an iterative message-passing algorithm, each iteration of the message-passing algorithm comprising evaluating a parity-check matrix defining the FEC code. At the FEC encoder, the coding rate of the FEC code may be varied by varying the number of client/information bits per codeword and/or the number of parity bits per codeword. At the FEC decoder, the parity-check matrix is evaluated column by column at each iteration of the message-passing algorithm. The decoder may be a belief propagation decoder. The computational complexity of the FEC decoder is advantageously weakly dependent and, in some cases, totally independent of the coding rate.

Abstract translation: 该应用涉及基于低密度奇偶校验（FEC）的FEC编码器（FEC）和FEC解码器（FD）的光学相干通信系统（CS）中的前向纠错机制。 ，LDPC，代码。 FEC编码器通过添加通过将FEC码应用于客户机比特而计算的奇偶校验位来将客户机比特块编码为码字。 此外，FEC解码器通过向其应用迭代消息传递算法来解码每个码字，消息传递算法的每次迭代包括评估定义FEC码的奇偶校验矩阵。 在FEC编码器处，可以通过改变每码字的客户端/信息比特的数量和/或每码字的奇偶比特的数量来改变FEC码的编码速率。 在FEC解码器中，奇偶校验矩阵在消息传递算法的每次迭代中被逐列评估。 解码器可以是置信传播解码器。 FEC解码器的计算复杂度有利地弱依赖，并且在一些情况下，完全独立于编码率。

公开(公告)号：WO2014187742A1

公开(公告)日：2014-11-27

申请号：PCT/EP2014/060084

申请日：2014-05-16

Applicant: ALCATEL LUCENT

Inventor： RAZZETTI, Luca, Gabriele ,  GAVIOLI, Giancarlo ,  PEPE, Marianna ,  COSTANTINI, Carlo

IPC: H04B10/61 ,  H04L27/00

CPC classification number: H04L27/2275 ,  H04B10/6165

Abstract: Embodiments relate to an apparatus (100; 300; 400; 500; 600) for recovering a phase of a received signal (S in ) carrying pilot and information symbols, wherein the received signal has been transmitted over a communication channel (200), the apparatus comprising a phase estimator (110) operable to determine a phase estimate (115) of a phase of the communication channel using the received signal, wherein the phase estimator (110) commits a phase slip with a phase slip probability (P s , Ρ τ ) depending on the communication channel (200); a demodulator (120) operable to determine demodulated pilot and information symbols (125) based on a coherent reception of the received pilot and information symbols using the determined phase estimate (115); a phase slip detector (130; 330; 430; 530; 630) operable to detect the phase slip based on a phase difference between at least one demodulated pilot symbol and at least one corresponding transmitted pilot symbol; and a phase corrector (140; 340; 440; 540) operable to correct a phase of demodulated information symbols based on the detected phase slip.

Abstract translation: 实施例涉及用于恢复携带导频和信息符号的接收信号（Sin）的相位的装置（100; 300; 400; 500; 600），其中所接收的信号已经通过通信信道（200）发送， 包括相位估计器（110），其可操作以使用所述接收信号确定所述通信信道的相位的相位估计（115），其中所述相位估计器（110）提交具有相位滑移概率（Ps，＆Rgr;τ ）取决于通信信道（200）; 解调器（120），用于基于使用所确定的相位估计（115）的所接收的导频和信息符号的相干接收来确定解调的导频和信息符号（125）; 相位滑动检测器（130; 330; 430; 530; 630），其可操作以基于至少一个解调的导频符号与至少一个对应的传输导频符号之间的相位差来检测相位滑移; 以及相位校正器（140; 340; 440; 540），其可操作以基于检测到的相位差来校正解调信息符号的相位。

公开(公告)号：WO2015024776A1

公开(公告)日：2015-02-26

申请号：PCT/EP2014/066866

申请日：2014-08-06

Applicant: ALCATEL LUCENT

Inventor： RAZZETTI, Luca, Gabriele ,  GAVIOLI, Giancarlo

IPC: H04J14/06 ,  H04B10/532

CPC classification number: H04J14/06 ,  H04B10/50 ,  H04J14/0282

Abstract: Proposed is an optical transmitter arrangement of a self-seeding concept with colourless transmitters in an optical access network. An optical transmission unit generates an optical signal comprising a first signal component having a polarization state that lies within a first polarization plane and furthermore comprising a second signal component having a polarization state that lies within a second polarization plane orthogonal to the first polarization plane.

Abstract translation: 提出了一种在光接入网络中具有无色发射机的自播概念的光发射机布置。 光传输单元产生包括具有位于第一偏振面内的偏振状态的第一信号分量的光信号，并且还包括具有位于与第一偏振面正交的第二偏振平面内的偏振状态的第二信号分量。

公开(公告)号：WO2012140186A1

公开(公告)日：2012-10-18

申请号：PCT/EP2012/056753

申请日：2012-04-13

Applicant: ALCATEL LUCENT ITALIA S.P.A. ,  MARTINELLI, Mario ,  GAVIOLI, Giancarlo ,  GALLI, Paola ,  DI MOLA, Domenico ,  PAROLARI, Paola ,  MARAZZI, Lucia ,  RAZZETTI, Luca ,  SUBERINI, Luca ,  CAMPI, Domenico

Inventor： MARTINELLI, Mario ,  GAVIOLI, Giancarlo ,  GALLI, Paola ,  DI MOLA, Domenico ,  PAROLARI, Paola ,  MARAZZI, Lucia ,  RAZZETTI, Luca ,  SUBERINI, Luca ,  CAMPI, Domenico

IPC: H04B10/145 ,  H01S5/14 ,  H01S3/106

CPC classification number: H04B10/27 ,  H01S3/08054 ,  H01S5/02284 ,  H01S5/02469 ,  H01S5/141 ,  H01S5/146 ,  H01S5/4062 ,  H01S5/4087 ,  H04B10/532

Abstract: The present document relates to the field of optical access networks. In particular, the present document relates to an optical transmitter, in particular (but not exclusively) for a WDM (Wavelength Division Multiplexing) passive optical network, and to a WDM PON comprising such an optical transmitter. An optical transmitter arrangement (7) is described. The arrangement (7) comprises a first mirror (41) and a second mirror (64) at a first end and a second end of a cavity, respectively; an optical amplifier (63) configured to amplify light polarized in a first polarization plane; wherein the optical amplifier (63) is positioned within the cavity upstream the first mirror (64); an optical waveguide (5-2) configured to transmit light from the optical amplifier (63) to the second mirror (41) and vice versa; a first non-reciprocal polarization rotator (82) positioned within the cavity upstream of the optical amplifier (63) and downstream of the optical waveguide (5-2); and a second non-reciprocal polarization rotator (81) positioned within the cavity upstream of the optical waveguide (5-2) and downstream of the first mirror (41); wherein the first (82) and second (81) non-reciprocal polarization rotators are configured to rotate the polarization of the light such that light which re-enters the optical amplifier (63) after having been reflected by the second mirror (41) is polarized in the first polarization plane.

Abstract translation: 本文件涉及光接入网络领域。 特别地，本文件涉及用于WDM（波分复用）​​无源光网络的光发射机，特别是（但不排他地））以及包括这种光发射机的WDM PON。 描述了一种光发射器装置（7）。 装置（7）分别包括位于空腔的第一端和第二端的第一反射镜（41）和第二反射镜（64） 光放大器（63），被配置为放大在第一偏振面中偏振的光; 其中所述光放大器（63）位于所述第一反射镜（64）上游的空腔内; 配置为将光从所述光放大器（63）传输到所述第二反射镜（41）的光波导（5-2），反之亦然; 位于光放大器（63）上游并位于光波导（5-2）下游的空腔内的第一非倒数偏振旋转器（82）; 以及位于所述光波导（5-2）上游并位于所述第一反射镜（41）下游的空腔内的第二非互易偏振旋转器（81）。 其中所述第一（82）和第二（81）不可逆偏振旋转器被配置为旋转所述光的偏振，使得在被所述第二反射镜（41）反射之后重新进入所述光放大器（63）的光是 在第一极化平面中极化。

公开(公告)号：WO2016050391A1

公开(公告)日：2016-04-07

申请号：PCT/EP2015/068009

申请日：2015-08-05

Applicant: ALCATEL LUCENT

Inventor： RAZZETTI, Luca ,  GAVIOLI, Giancarlo ,  COSTANTINI, Carlo ,  PEPE, Marianna

IPC: H04B10/61 ,  H03M13/05 ,  H03M13/11 ,  H03M13/37 ,  H03M13/45 ,  H03M13/00 ,  H04L1/00

CPC classification number: H04L1/005 ,  H03M13/1111 ,  H03M13/1145 ,  H03M13/2963 ,  H03M13/2987 ,  H03M13/3746 ,  H03M13/6561 ,  H04B10/616 ,  H04L1/0057

Abstract: It is disclosed an optical coherent receiver comprising a number of decoding blocks configured to implement iterations of a FEC iterative message-passing decoding algorithm. The decoding blocks are distributed into two (or more) parallel chains of cascaded decoding blocks. The receiver also comprises an intermediate circuit interposed between the two parallel chains. The optical coherent receiver is switchable between (i) a first operating mode, in which the intermediate circuit is inactive and the two parallel chains separately implement the FEC message-passing decoding algorithm on respective client channels; and (ii) a second operating mode, in which the intermediate circuit is active and the two parallel chains jointly implement the FEC message-passing decoding algorithm on a same client channel, by cooperating through the intermediate circuit.

Abstract translation: 公开了一种光学相干接收机，其包括多个解码块，其被配置为实现FEC迭代消息传递解码算法的迭代。 解码块被分配到级联解码块的两个（或多个）并行链中。 接收器还包括插入在两个平行链之间的中间电路。 光相干接收机可以在（i）第一操作模式之间切换，其中中间电路不活动，并且两个并行链在相应的客户信道上分别实现FEC消息传递解码算法; 以及（ii）第二操作模式，其中中间电路是有效的，并且两个并行链通过中间电路协作在同一客户信道上共同实施FEC消息传递解码算法。

公开(公告)号：WO2015154962A1

公开(公告)日：2015-10-15

申请号：PCT/EP2015/055748

申请日：2015-03-19

Applicant: ALCATEL LUCENT

Inventor： GAVIOLI, Giancarlo ,  RAZETTI, Luca Gabriele ,  PEPE, Marianna ,  COSTANTINI, Carlo

IPC: H04B10/61

CPC classification number: H04B10/6165

Abstract: It is disclosed a an apparatus for compensating transmitter quadrature imbalances over an optical signal received at an optical coherent receiver of a node of an optical communication network. The optical signal comprises information symbols and pilot symbols. The receiver is configured to store a sequence of reference pilot symbols. The apparatus comprises an absolute phase estimating circuit configured to estimate a phase error between a received pilot symbol and a corresponding reference pilot symbol; a phase correcting module configured to remove the phase error from the received pilot symbol and a number of received information symbols associated with the received pilot symbol; a quadrature imbalance detection circuit configured to estimate the transmitter quadrature imbalances on the basis of at least the phase-corrected pilot symbol; and a quadrature imbalance compensation circuit configured to compensate the estimated transmission quadrature imbalances over the number of phase-corrected information symbols.

Abstract translation: 公开了一种用于在光通信网络的节点的光学相干接收机处接收的光信号上补偿发射机正交不平衡的装置。 光信号包括信息符号和导频符号。 接收器被配置为存储参考导频符号序列。 该装置包括：绝对相位估计电路，被配置为估计接收到的导频符号和对应的参考导频符号之间的相位误差; 相位校正模块，被配置为从所接收的导频符号中去除相位误差和与所接收的导频符号相关联的接收到的信息符号数; 正交不平衡检测电路，被配置为基于至少相位校正的导频符号来估计发射机正交不平衡; 以及正交不平衡补偿电路，被配置为相对于相位校正信息符号的数量来补偿所估计的发送正交不平衡。