公开(公告)号：EP1554822B1

公开(公告)日：2012-04-25

申请号：EP03757590.9

申请日：2003-10-03

申请人： Ciena Luxembourg S.a.r.l.

发明人： ROBERTS, Kim ,  STRAWCZYNSKI, Leo ,  COMEAU, Adrien ,  MCNICOL, John ,  O'SULLIVAN, Maurice ,  PARSONS, Kieran

IPC分类号： H04B10/18

CPC分类号： H04B10/505 ,  H04B10/25137 ,  H04B10/2572 ,  H04B10/5053 ,  H04B10/50593 ,  H04B10/508

摘要： Polarization Dependent Effects (PDEs), including Polarization Mode Dispersion (PMD) and Polarization Dependent Loss (PDL) imposed on optical signals conveyed through an optical link are compensated by processing an input signal in the electrical domain prior to transmission. A compensation function is derived that at least partially compensates the PDEs. The communications signal is then processed in the electrical domain using the compensation function to generate an electrical predistorted signal. The electrical predistorted signal is then used to modulate an optical source to generate a corresponding predistorted optical signal for transmission through the optical link. The PDEs of the optical link operate of the predistorted optical signal such at that substantially undistorted optical signal is received at a receiving end of the link.

公开(公告)号：EP1249086B1

公开(公告)日：2009-09-23

申请号：EP00989567.3

申请日：2000-12-29

申请人： BROADBAND ROYALTY CORPORATION

发明人： CHIAPPETTA, Joseph, F. ,  GURUSAMI, Aravan

IPC分类号： H04B10/155

CPC分类号： H04B10/505 ,  H04B10/50575 ,  H04B10/50593 ,  H04B10/58

摘要： An electronic pre-distorter which generates distortions for input to a non-linear device is provided. The pre-distorter generates distortions using only non-magnetic circuit components. The distortions are complementary to distortions that are generated by the non-linear device and substantially cancel out. The reduction of distortion in the non-linear device improves the dynamic range of transmitters that the device is part of.

公开(公告)号：EP1811693A4

公开(公告)日：2009-01-07

申请号：EP04822365

申请日：2004-11-08

申请人： MITSUBISHI ELECTRIC CORP

发明人： ABE JUN ICHI ,  SHIMIZU KATSUHIRO

IPC分类号： H04B10/516 ,  G02F1/015 ,  H01S3/10 ,  H04B10/07 ,  H04B10/293 ,  H04B10/564 ,  H04B10/572 ,  H04B10/61 ,  H04J14/00 ,  H04J14/02

CPC分类号： H04B10/50575 ,  G02F1/0123 ,  H04B10/07957 ,  H04B10/505 ,  H04B10/5057 ,  H04B10/50572 ,  H04B10/50593 ,  H04B10/50595 ,  H04B10/572

摘要： An optical transmitter and an optical communication system comprising it imparted with a wavelength independent function. The optical communication system comprises an optical modulator (11), a photocoupler (12) for branching the optical output signal from the optical modulator, a cross-point monitor means (13) for receiving one optical signal branched by the photocoupler and monitoring the cross-point of the optical output signal from the optical modulator, a reference value setting means (14) for setting such a bias reference value to be imparted to the optical modulator as the cross-point becomes constant based on the output signal from the cross-point monitor means, and a bias circuit (15) for applying a predetermined bias to the optical modulator based on the bias reference value outputted from the reference value setting means.

公开(公告)号：EP1554822A1

公开(公告)日：2005-07-20

申请号：EP03757590.9

申请日：2003-10-03

申请人： Nortel Networks Limited

发明人： ROBERTS, Kim ,  STRAWCZYNSKI, Leo ,  COMEAU, Adrien ,  MCNICOL, John ,  O'SULLIVAN, Maurice ,  PARSONS, Kieran

IPC分类号： H04B10/18

CPC分类号： H04B10/505 ,  H04B10/25137 ,  H04B10/2572 ,  H04B10/5053 ,  H04B10/50593 ,  H04B10/508

摘要： Polarization Dependent Effects (PDEs), including Polarization Mode Dispersion (PMD) and Polarization Dependent Loss (PDL) imposed on optical signals conveyed through an optical link are compensated by processing an input signal in the electrical domain prior to transmission. A compensation function is derived that at least partially compensates the PDEs. The communications signal is then processed in the electrical domain using the compensation function to generate an electrical predistorted signal. The electrical predistorted signal is then used to modulate an optical source to generate a corresponding predistorted optical signal for transmission through the optical link. The PDEs of the optical link operate of the predistorted optical signal such at that substantially undistorted optical signal is received at a receiving end of the link.

公开(公告)号：EP0849897B1

公开(公告)日：2005-02-23

申请号：EP97120619.8

申请日：1997-11-25

申请人： Scientific-Atlanta, Inc.

发明人： Pidgeon, Rezin E.

IPC分类号： H04B10/155

CPC分类号： H04B10/5051 ,  H04B10/50572 ,  H04B10/50575 ,  H04B10/50593 ,  H04B10/50595 ,  H04B10/58 ,  H04B2210/254

公开(公告)号：EP0792033A3

公开(公告)日：1999-04-14

申请号：EP97102596.0

申请日：1997-02-18

申请人： KOKUSAI DENSHIN DENWA CO., LTD

发明人： Horiuchi, Yukio c/o Kokusai Denshin Denwa K.K. ,  Yamamoto, Shu c/o Kokusai Denshin Denwa K.K. ,  Akiba, Shigeyuki c/o Kokusai Denshin Denwa K.K.

IPC分类号： H04B10/155

CPC分类号： H04B10/50593 ,  H04B10/504 ,  H04B10/505 ,  H04B10/5051 ,  H04B10/50597 ,  H04B10/564

摘要： A laser light generator includes an adder 12 which adds an optical frequency modulation signal Sm onto a d.c. voltage for driving a laser diode 10 for continuous laser oscillation, and applies the sum signal to the laser diode 10 to drive it. An light output from the laser diode 10 is introduced to an optical intensity controller 14 that is controlled by a control signal prepared by adjusting the optical frequency modulation signal Sm both in phase and in amplitude by a phase adjusting circuit 16 and an amplitude adjusting circuit 18. The optical intensity controller 14 may be an electroabsorption modulator that changes its transmissivity in response to an output voltage of the circuit 18. Quantities of adjustment by the circuits 16 and 18 are determined so that fluctuation in transmissivity of the optical intensity controller 14 suppresses intensity fluctuation of the light output of the laser diode 10.

摘要翻译： 激光发生器包括加法器12，该加法器12将光频调制信号Sm加到直流电路上。 用于驱动用于连续激光振荡的激光二极管10的电压，并将和信号施加到激光二极管10以驱动它。 来自激光二极管10的光输出被引入光强度控制器14，该光强度控制器14由通过相位调整电路16和幅度调整电路18调整相位和幅度的光频调制信号Sm而制成的控制信号来控制 光强度控制器14可以是响应于电路18的输出电压改变其透射率的电吸收调制器。电路16和18的调整量被确定为使得光强度控制器14的透射率的波动抑制强度 激光二极管10的光输出的波动

公开(公告)号：EP0612452B1

公开(公告)日：1998-02-04

申请号：EP93917223.5

申请日：1993-07-15

申请人： Uniphase Telecommunications Products,Inc.

发明人： FARINA, James, D. ,  McBRIEN, Gregory, J.

IPC分类号： H04B10/14

CPC分类号： H04B10/50593 ,  H04B10/505 ,  H04B10/58

公开(公告)号：EP3012984B1

公开(公告)日：2017-09-13

申请号：EP15164451.5

申请日：2015-04-21

申请人： ADVA Optical Networking SE

发明人： Alfiad, Mohammad ,  Tibuleac, Sorin

IPC分类号： H04B10/50 ,  H04B10/588 ,  H04B10/61

CPC分类号： H04B10/50572 ,  H04B10/50575 ,  H04B10/50593 ,  H04B10/50595 ,  H04B10/588 ,  H04B10/615

公开(公告)号：EP3012984A1

公开(公告)日：2016-04-27

申请号：EP15164451.5

申请日：2015-04-21

申请人： ADVA Optical Networking SE

发明人： Alfiad, Mohammad ,  Tibuleac, Sorin

IPC分类号： H04B10/50 ,  H04B10/588 ,  H04B10/61

CPC分类号： H04B10/50572 ,  H04B10/50575 ,  H04B10/50593 ,  H04B10/50595 ,  H04B10/588 ,  H04B10/615

摘要： A transmitter with at least one optical modulator adapted to modulate the optical signal output by a laser source to generate a modulated optical signal, wherein the optical signal output by the laser source is tapped and supplied to a monitoring circuit comprising an optical frontend configured to select signal components of the tapped modulated optical signal, via optical coherent detection, and to convert the selected signal components of the tapped modulated optical signal into analog signals, and comprising at least one analog-to-digital converter, ADC, adapted to perform equivalent-time sampling of the analog signals to provide digital signals processed by a processing unit to monitor signal quality of the modulated optical signal.

摘要翻译： 与至少一个光学调制器angepasst发射机由激光源以调制所述光信号输出，以产生调制的光信号，worin由激光源输出的光信号被分接，并提供给被配置为选择一个监视电路，其包括光学前端的 抽头调制光信号的信号分量，通过光学相干检测，并以螺纹调制的光信号转换成模拟信号的所选择的信号分量转换，并包括至少一个模拟数字转换器，ADC，angepasst执行等效 该模拟信号到数字信号的时间采样由处理单元提供经处理的监视调制光信号的信号质量。

公开(公告)号：EP1811693B1

公开(公告)日：2012-04-04

申请号：EP04822365.5

申请日：2004-11-08

申请人： MITSUBISHI ELECTRIC CORPORATION

发明人： ABE, Jun'ichi, c/o Mitsubishi Denki K.K. ,  SHIMIZU, Katsuhiro, c/o Mitsubishi Denki K.K.

IPC分类号： H04B10/08 ,  H04B10/155 ,  G02F1/01

CPC分类号： H04B10/50575 ,  G02F1/0123 ,  H04B10/07957 ,  H04B10/505 ,  H04B10/5057 ,  H04B10/50572 ,  H04B10/50593 ,  H04B10/50595 ,  H04B10/572

摘要： An optical transmitter and an optical communication system comprising it imparted with a wavelength independent function. The optical communication system comprises an optical modulator (11), a photocoupler (12) for branching the optical output signal from the optical modulator, a cross-point monitor means (13) for receiving one optical signal branched by the photocoupler and monitoring the cross-point of the optical output signal from the optical modulator, a reference value setting means (14) for setting such a bias reference value to be imparted to the optical modulator as the cross-point becomes constant based on the output signal from the cross-point monitor means, and a bias circuit (15) for applying a predetermined bias to the optical modulator based on the bias reference value outputted from the reference value setting means.