公开(公告)号：DE602005000871T2

公开(公告)日：2007-12-20

申请号：DE602005000871

申请日：2005-09-22

Applicant: LUCENT TECHNOLOGIES INC

Inventor： FISHMAN DANIEL A ,  LIU XIANG ,  WEI XING ,  YING JINPIN

IPC: H04B10/18 ,  H04J14/02

Abstract: A dispersion compensator apparatus including interleavers for deinterleaving/interleaving even and odd channels of a WDM signal, and dispersion compensation modules (DCMs) coupled between the interleavers. One or more of the DCMs is a periodic-group-delay (PGD) DCMs for providing dispersion compensation.

公开(公告)号：CA2327709C

公开(公告)日：2004-10-19

申请号：CA2327709

申请日：2000-12-06

Applicant: LUCENT TECHNOLOGIES INC

Inventor： FISHMAN DANIEL A ,  HEISMANN FRED LUDWIG ,  WILSON DAVID L

IPC: H04B10/02 ,  H04B10/18

Abstract: The effect of polarization mode dispersion that an optical signal experience s as it propagates through an optical transmission fiber is compensated for at a receiver using a birefringent compensator, in which a distortion analyzer repeatedly examines the signal outputted by the compensator and causes the compensator to reduce the effect of such polarization mode dispersion based on the results of such examination.

公开(公告)号：CA2450499C

公开(公告)日：2004-08-10

申请号：CA2450499

申请日：2000-12-06

Applicant: LUCENT TECHNOLOGIES INC

Inventor： WILSON DAVID L ,  HEISMANN FRED LUDWIG ,  FISHMAN DANIEL A

IPC: H04B10/07 ,  G01R23/20 ,  H04B10/2507 ,  H04B10/08 ,  H04B10/18

Abstract: The present invention relates to a distortion analyzer. The distortion analyzer is comprised of a converter for converting a signal outputted by optical apparatus into an electrical signal. A receiver is provided for converting the electrical signal into AC and DC components, for splitting the AC component signal into a plurality of signals, and for supplying the AC component signals to respective sections of a distortion analyzer. A squaring unit is provided for squaring the vague of the DC component. A divider divides the output from the distortion analyzer by the value of the squared signal and supplies the resulting quotient signal as a distortion indicator to the optical apparatus. The optical apparatus is responsive to receipt of the distortion indicator, and changes the level of the outputted signal until the distortion indicator reaches a predetermined state.

公开(公告)号：CA2299143C

公开(公告)日：2003-05-27

申请号：CA2299143

申请日：2000-02-23

Applicant: LUCENT TECHNOLOGIES INC

Inventor： SHEHADEH FATIMAH ,  ZHOU JIANHUI ,  BERGER MATTHIAS ,  RAABE CHRISTIAN ,  LIVESCU GABRIELA ,  ZIRNGIBL MARTIN ,  BODE DIRK ,  FISHMAN DANIEL A

IPC: G02F1/35 ,  H01S3/06 ,  H01S3/10 ,  H01S3/30 ,  H04B10/02 ,  H04B10/17 ,  H04B10/18 ,  H04B10/29 ,  H04J14/00 ,  H04J14/02 ,  H04B10/16

Abstract: An optical amplifier is adapted to cancel the Raman gain of an optical transmission path that degrades those optical signals occupying the low end of the bandwidth such that the power is transferred from the latter signals to the optical signals occupying the high end of the bandwidth. More specifically, the optical amplifier adjusts the gain that it applies to the optical signals so that it favors the signal components at the low end of the bandwidth.

公开(公告)号：CA2252209C

公开(公告)日：2002-09-03

申请号：CA2252209

申请日：1998-10-29

Applicant: LUCENT TECHNOLOGIES INC

Inventor： FANG WEI-CHIAO WILLIAM ,  DENKIN NATHAN MYRON ,  FISHMAN DANIEL A

IPC: G02F1/01 ,  H04B10/00 ,  H04B10/02 ,  H04L1/22 ,  H04M3/22 ,  H04Q3/52 ,  H04B10/08 ,  H04B10/24

Abstract: A protection facility is provided for use in an optical communications node that communicates with another optical communications node via first and second bi-directional communications paths respectively serving as a service path and protection path, in which a filter filters signals respecti velyreceived over the service and protection paths and g enerates a main signal and a complementary signal for each of the paths. A control unit then generates a Loss of Signal (LOS_A) indication for the service path if a SUM signal or DIFF signal respectively derived as a function of a sum of the mai n and complementary signals generated for the service path and difference between the main and complementary signals generated for the service path is less than a respective threshold value. A switch then invokes protection switching responsive to the presence of the LOS_A indication.

公开(公告)号：AU1951900A

公开(公告)日：2000-09-14

申请号：AU1951900

申请日：2000-02-28

Applicant: LUCENT TECHNOLOGIES INC

Inventor： BERGER MATTHIAS ,  BODE DIRK ,  FISHMAN DANIEL A ,  LIVESCU GABRIELA ,  RAABE CHRISTIAN ,  SHEHADEH FATIMAH ,  ZHOU JIANHUI ,  ZIRNGIBL MARTIN

IPC: G02F1/35 ,  H01S3/06 ,  H01S3/10 ,  H01S3/30 ,  H04B10/02 ,  H04B10/17 ,  H04B10/18 ,  H04B10/29 ,  H04J14/00 ,  H04J14/02

Abstract: An optical amplifier is adapted to cancel the Raman gain of an optical transmission path that degrades those optical signals occupying the low end of the bandwidth such that the power is transferred from the latter signals to the optical signals occupying the high end of the bandwidth. More specifically, the optical amplifier adjusts the gain that it applies to the optical signals so that it favors the signal components at the low end of the bandwidth.

公开(公告)号：CA2299143A1

公开(公告)日：2000-09-08

申请号：CA2299143

申请日：2000-02-23

Applicant: LUCENT TECHNOLOGIES INC

Inventor： BERGER MATTHIAS ,  BODE DIRK ,  LIVESCU GABRIELA ,  RAABE CHRISTIAN ,  ZIRNGIBL MARTIN ,  ZHOU JIANHUI ,  SHEHADEH FATIMAH ,  FISHMAN DANIEL A

IPC: G02F1/35 ,  H01S3/06 ,  H01S3/10 ,  H01S3/30 ,  H04B10/02 ,  H04B10/17 ,  H04B10/18 ,  H04B10/29 ,  H04J14/00 ,  H04J14/02 ,  H04B10/16

Abstract: An optical amplifier is adapted to cancel the Raman gain of an optical transmission path that degrades those optical signals occupying the low end of the bandwidth such that the power is transferred from the latter signals to the optical signals occupying the high end of the bandwidth. More specifically, the optical amplifier adjusts the gain that it applies to the optical signals so that it favors the signal components at the low end of the bandwidth.

公开(公告)号：CA2252209A1

公开(公告)日：1999-06-19

申请号：CA2252209

申请日：1998-10-29

Applicant: LUCENT TECHNOLOGIES INC

Inventor： FISHMAN DANIEL A ,  FANG WEI-CHIAO WILLIAM ,  DENKIN NATHAN MYRON

IPC: G02F1/01 ,  H04B10/00 ,  H04B10/02 ,  H04L1/22 ,  H04M3/22 ,  H04Q3/52 ,  H04B10/08 ,  H04B10/24

Abstract: A protection facility is provided for use in an optical communications node that communicates with another optical communications node via first and second bi-directional communications paths respectively serving as a service path and protection path, in which a filter filters signals respectively received over the service and protection paths and generates a main signal and a complementary signal for each of the paths. A control unit then generates a Loss of Signal (LOS_A) indication for the service path if a SUM signal or DIFF signal respectively derived as a function of a sum of the main and complementary signals generated for the service path and difference between the main and complementary signals generated for the service path is less than a respective threshold value. A switch then invokes protection switching responsive to the presence of the LOS_A indication.

公开(公告)号：CA2245303A1

公开(公告)日：1999-03-16

申请号：CA2245303

申请日：1998-08-19

Applicant: LUCENT TECHNOLOGIES INC

Inventor： FISHMAN DANIEL A ,  HEISMANN FRED LUDWIG ,  WILSON DAVID L

IPC: H04B10/02 ,  H04B3/06 ,  H04B10/18

Abstract: The effect of polarization mode dispersion that an optical signal experiences as it propagates through an optical transmission fiber is compensated for at a receiver using a birefringent compensator, in which the compensator automatically and adaptively generates a level of differential time delay that substantially equals the differential time delay that the optical signal experiences, but of different sign, and, therefore, essentially cancels out the undesired delay.

公开(公告)号：DE60034618D1

公开(公告)日：2007-06-14

申请号：DE60034618

申请日：2000-02-28

Applicant: LUCENT TECHNOLOGIES INC

Inventor： BERGER MATTHIAS ,  BODE DIRK ,  FISHMAN DANIEL A ,  LIVESCU GABRIELA ,  RAABE CHRISTIAN ,  SHEHADEH FATIMAH ,  ZHOU JIANHUI ,  ZIRNGIBL MARTIN

IPC: G02F1/35 ,  H04B10/17 ,  H01S3/06 ,  H01S3/10 ,  H01S3/30 ,  H04B10/02 ,  H04B10/18 ,  H04B10/29 ,  H04J14/00 ,  H04J14/02

Abstract: An optical amplifier is adapted to cancel the Raman gain of an optical transmission path that degrades those optical signals occupying the low end of the bandwidth such that the power is transferred from the latter signals to the optical signals occupying the high end of the bandwidth. More specifically, the optical amplifier adjusts the gain that it applies to the optical signals so that it favors the signal components at the low end of the bandwidth.