公开(公告)号：EP2381594A1

公开(公告)日：2011-10-26

申请号：EP10305416.9

申请日：2010-04-21

申请人： Alcatel Lucent

发明人： Cucchi, Silvio ,  Kaneda, Noriaki ,  Weisser, Stefan ,  Constantini, Carlo ,  Leven, Andreas

IPC分类号： H04B10/148 ,  H04B10/18 ,  H04J14/06

CPC分类号： H04J14/06 ,  H04B10/2569 ,  H04B10/61 ,  H04B10/6162 ,  H04J14/002

摘要： It is disclosed a coherent optical receiver for an optical communication network configured to receive a polarization multiplexed optical signal and to process it for generating a first and second received components thereof. Each of the first and second received components comprises a mixing of a first and second polarization components of the originally transmitted signal. The coherent optical receiver comprises a polarization demultiplexer comprising a first, second and third circuit. The first circuit calculates first and second Fourier transforms of the first and second received components. The second circuit multiplies the first and second Fourier transforms by a first and second transfer functions, respectively, adds them thereby providing a demultiplexed Fourier transform and retrieves the first polarization component applying thereto an inverse Fourier transform. The third circuit retroactively updates the first and second transfer functions, according to the retrieved first polarization component and the first and second received components.

公开(公告)号：EP2360858A1

公开(公告)日：2011-08-24

申请号：EP09830328.2

申请日：2009-11-24

申请人： Nippon Telegraph And Telephone Corporation

发明人： TSUJIMURA, Takeshi ,  TANAKA, Kuniaki ,  YOSHIDA, Koichi ,  KATAYAMA, Kazunori ,  AZUMA, Yuji ,  SHIMIZU, Masatoshi

IPC分类号： H04B10/12 ,  H04B1/74 ,  H04B10/02 ,  H04B10/13 ,  H04B10/135 ,  H04B10/14 ,  H04B10/20

CPC分类号： H04J14/02 ,  H04B10/032 ,  H04J14/002 ,  H04J14/0221 ,  H04J14/0294 ,  H04J14/0295 ,  H04Q11/0005 ,  H04Q11/0062 ,  H04Q2011/0043 ,  H04Q2011/0081

摘要： Terminals of upstream and downstream sides of an in-service line and a detour line are connected by optical couplers. An optical oscilloscope is connected to one optical coupler, and a chirped pulse light source is connected to the other optical coupler to thereby form dualized lines. The detour line includes an optical line length adjuster for compensating for the phase difference of optical transmission signals that occurs because of the optical line length difference with the in-service line. Pulse light in which an optical frequency is chirped is transmitted from the chirped pulse light source. The pulse light is branched by the second optical coupler, passes through the in-service line and the detour line, is multiplexed again by the first optical coupler, and is measured by the optical oscilloscope. While matching an arrival time of the pulse light, the optical line length is adjusted by the optical line length adjuster so as to minimize the size of upper and lower limits of an interference waveform generated in an upper part of the pulse light waveform or so as to make a frequency of an interference waveform become zero.

摘要翻译： 在线和迂回线的上游侧和下游侧的端子通过光耦合器连接。 光学示波器连接到一个光耦合器，并且啁啾脉冲光源连接到另一个光耦合器，从而形成二元化线。 迂回线包括光线路长度调节器，用于补偿由于与在线线路的光线路长度差异而发生的光传输信号的相位差。 从啁啾脉冲光源发射光频率啁啾的脉冲光。 脉冲光由第二光耦合器分支，通过在用线路和迂回线路，由第一光耦合器再次复用，并由光示波器测量。 在匹配脉冲光的到达时间的同时，通过光线路长度调节器调整光线路长度，以使脉冲光波形的上部产生的干扰波形的上限和下限的大小最小化， 使得干扰波形的频率变为零。

公开(公告)号：EP2348651A1

公开(公告)日：2011-07-27

申请号：EP11151215.8

申请日：2011-01-18

申请人： Alcatel Lucent

发明人： Bertran Pardo, Oriol ,  Salsi, Massimiliano

IPC分类号： H04B10/148 ,  H04B10/17 ,  H04B10/158 ,  H04J14/02

CPC分类号： H04B10/6971 ,  H04B10/294 ,  H04B10/60 ,  H04B10/611 ,  H04B10/6161 ,  H04J14/002

摘要： The present invention pertains to a method for retrieving at least one optical signal transmitted over a communication network by a transmission channel, said method using coherent detection and comprising the following steps:
- a coherent mixing of at least one transmitted optical signal and a baseline signal emitted by at least one frequency-tunable local oscillator,
- a sampling of the signals derived from the coherent mixing, comprising an analog-digital conversion,
- a digital signal processing,

wherein the digital signal processing comprises a spectrum analysis function.

摘要翻译： 本发明涉及一种用于检索通过传输信道在通信网络上发送的至少一个光信号的方法，所述方法使用相干检测，并且包括以下步骤： - 至少一个传输的光信号和基线信号的相干混合 由至少一个频率可调谐的本地振荡器发射的 - 从相干混合导出的信号的采样，包括模数转换，数字信号处理，其中所述数字信号处理包括频谱分析功能。

公开(公告)号：EP0709976A1

公开(公告)日：1996-05-01

申请号：EP95402339.6

申请日：1995-10-20

申请人： FRANCE TELECOM

发明人： Hamel, André ,  Goedgebuer, Jean-Pierre ,  Porte, Henri

IPC分类号： H04B10/142 ,  H04J14/08

CPC分类号： H04J14/08 ,  H04J14/002

摘要： Ce réseau comprend une ligne optique (2), au moins une source lumineuse (4) de faible longueur de cohérence, dont la lumière est injectée dans la ligne optique, des capteurs auto-générateurs (12, 14, 16) reliés à des moyens de multiplexage de cohérence (6, 8, 10) qui sont montés sur la ligne optique et prévus pour multiplexer optiquement les signaux fournis par les capteurs, en codant ces signaux sous forme de retards optiques, et des moyens de démultiplexage de cohérence (20, 22, 24), pour le démultiplexage de ces signaux. Application aux industries automobile et aéronautique.

摘要翻译： 该网络包括在光学源（4）与850纳米波长和低光学相干光纤（2）的哪一个饲料。 该纤维具有多个光学多路复用器（6,8,10），其中每个由检测器（12,14,16）的操作。 该检测器是由压电元件构成。 每个多路复用器具有一个给定的延迟信号之间进行区分。 信号沿着光纤的相干多路分解器（26），其具有针对每个复用信号的检测器（20,22,24），从而允许检测器元件的状态的检测通过。

公开(公告)号：EP0191588B1

公开(公告)日：1993-03-24

申请号：EP86300751.4

申请日：1986-02-05

申请人： THE BOARD OF TRUSTEES OF THE LELAND STANFORD JUNIOR UNIVERSITY

发明人： Brooks, Janet L. ,  Tur, Moshe ,  Youngquist, Robert C. ,  Kim, Byoung Yoon ,  Wentworth, Robert H. ,  Shaw, Herbert John ,  Blotekjaer, Kjell

IPC分类号： G01D5/26

CPC分类号： G01D5/35383 ,  G02B6/14 ,  G02B6/2821 ,  G02B6/2826 ,  G02B6/283 ,  G02B6/2843 ,  G02B6/2861 ,  H04J14/002

公开(公告)号：EP0251748B1

公开(公告)日：1992-11-11

申请号：EP87305737.6

申请日：1987-06-26

申请人： BRITISH TELECOMMUNICATIONS public limited company

发明人： Smith, David William

IPC分类号： H04B10/00 ,  H04B1/66 ,  H04J13/00

CPC分类号： H04J14/005 ,  H04B1/69 ,  H04B10/64 ,  H04J14/002 ,  H04J14/08

公开(公告)号：EP0191588A2

公开(公告)日：1986-08-20

申请号：EP86300751.4

申请日：1986-02-05

申请人： THE BOARD OF TRUSTEES OF THE LELAND STANFORD JUNIOR UNIVERSITY

发明人： Brooks, Janet L. ,  Tur, Moshe ,  Youngquist, Robert C. ,  Kim, Byoung Yoon ,  Wentworth, Robert H. ,  Shaw, Herbert John ,  Blotekjaer, Kjell

IPC分类号： G01D5/26

CPC分类号： G01D5/35383 ,  G02B6/14 ,  G02B6/2821 ,  G02B6/2826 ,  G02B6/283 ,  G02B6/2843 ,  G02B6/2861 ,  H04J14/002

摘要： A distributed sensor system including an optical source (100) having a short coherence length for optionally continuously monitoring each sensor in the system. In one preferred embodiment, an array of fiber-optic sensors (110) are organized in a ladder configuration, with the sensors positioned in spaced relation and defining the rungs of the ladder. Light transmitted through the sensors is multiplexed onto a return arm (114) of the ladder, with sensor spacing being such that interference between light from different sensors is prevented. The multiplexed signals are received by an optical fiber receiver (118, 120) which couples the mutiplexed light with an interfering optical reference signal to produce a phase difference signal representing conditions influencing selected sensors. Embodiments are disclosed for use of either pulsed or continuous wave light sources. In another preferred embodiment, the sensors comprise a plurality of interferometers (404,406) connected in series configuration by a common optical fiber (402), which provides multiplexed output signals from the sensors to another plurality of interferometers (418, 420) comprising receivers. Functional equivalents of the series configuration provide sensors and receivers comprising birefringent or two-mode fiber. The optical path length differences between each pair of sensor arms (409, 410, 411 and 412) are selected to prevent interference between the multiplexed sensor output signals from the various sensors. The optical path lengths through the sensors (404, 406) and receivers (418, 420) are structured so that each receiver (418, 420) produces a phase difference signal relating to conditions affecting light transmission through a specific sensor (404, 406). A phase and amplitude modulation technique is disclosed for providing heterodyned output signals from the dristributed sensor system.