公开(公告)号：EP1249086A1

公开(公告)日：2002-10-16

申请号：EP00989567.3

申请日：2000-12-29

申请人： ADC Telecommunications, Inc.

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：EP1249085A2

公开(公告)日：2002-10-16

申请号：EP00989566.5

申请日：2000-12-29

申请人： ADC Telecommunications, Inc.

发明人： CHIAPPETTA, Joseph, F.

IPC分类号： H04B10/155

CPC分类号： H04B10/50595 ,  H04B10/504 ,  H04B10/505 ,  H04B10/50572 ,  H04B10/50575 ,  H04B10/50593 ,  H04B10/58

摘要： A distortion monitor for a non-linear device is provided. The control circuit includes an input coupleable to receive a signal from the non-linear device and a first frequency monitor coupled to the input. The frequency monitor monitors the level of one of even and odd order distortion at a first frequency and creates a first signal indicative of the level of the distortion without the use of a pilot tone.

公开(公告)号：EP0776554A1

公开(公告)日：1997-06-04

申请号：EP95926988.0

申请日：1995-07-28

申请人： THOMSON-CSF

发明人： HERGAULT, Stéphane ,  HARDY, Patrick

IPC分类号： G02F1 ,  H04B10

CPC分类号： H04B10/50577 ,  H04B10/505 ,  H04B10/50593

摘要： Optical emitting head consisting of a laser (6) and an external optical modulator (8). The modulating signal is modulated (12) by an electrical signal proportional to 1-e, e being the noise power superimposed onto the laser signal, before being applied to the optical modulator (8). The invention is suitable for fibre optical transmission applications.

公开(公告)号：EP0370252B1

公开(公告)日：1996-08-28

申请号：EP89119728.7

申请日：1989-10-24

申请人： SUMITOMO ELECTRIC INDUSTRIES, LTD.

发明人： Shigematsu, Masayuki c/o Yokohama Works ,  Nishimura, Akira c/o Yokohama Works ,  Suzuki, Shuzo c/o Yokohama Works

IPC分类号： H04B10/14 ,  H04B10/18

CPC分类号： H04B10/58 ,  H04B10/504 ,  H04B10/50593 ,  H04B10/541

公开(公告)号：EP0370514A3

公开(公告)日：1992-05-27

申请号：EP89121698.8

申请日：1989-11-24

申请人： SUMITOMO ELECTRIC INDUSTRIES, LTD.

发明人： Nishimura, Akira c/o Yokohama Works ,  Suzuki, Shuzo c/o Yokohama Works ,  Shigematsu, Masayuki c/o Yokohama Works

IPC分类号： H04B10/14 ,  H04B10/18

CPC分类号： H04B10/0775 ,  H04B10/50593 ,  H04B10/54

摘要： An optical communication arrangement (apparatus and method) employing intensity modulation. The parameters of the optical communication system that impose a maximum influence on the modulation distortion are monitored whenever necessary, and the operating parameters of the optical communication system can be corrected in accordance with the parameters being monitored. The system employs the intensity modulation in which a delaying mechanism having a low delay accuracy and a delaying mechanism having a high delay accuracy are provided to completely suppress the modulation distortion.

公开(公告)号：EP0370252A2

公开(公告)日：1990-05-30

申请号：EP89119728.7

申请日：1989-10-24

申请人： SUMITOMO ELECTRIC INDUSTRIES, LTD.

发明人： Shigematsu, Masayuki c/o Yokohama Works ,  Nishimura, Akira c/o Yokohama Works ,  Suzuki, Shuzo c/o Yokohama Works

IPC分类号： H04B10/14 ,  H04B10/18

CPC分类号： H04B10/58 ,  H04B10/504 ,  H04B10/50593 ,  H04B10/541

摘要： An optical communication system of the optical feed forward type in which a main optical signal (501) and a distortion signal (502) are transmitted by a common optical fiber line (22) from the transmission part to the reception part.

摘要翻译： 一种光前馈型光通信系统，其中主光信号（501）和失真信号（502）由公共光纤线路（22）从发送部分发送到接收部分。