公开(公告)号：DE69834787T2

公开(公告)日：2007-05-16

申请号：DE69834787

申请日：1998-09-08

Applicant: LUCENT TECHNOLOGIES INC

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

IPC: H04B10/02 ,  H04B10/135 ,  H04B3/06 ,  H04B10/18

公开(公告)号：DE60026626T2

公开(公告)日：2006-11-02

申请号：DE60026626

申请日：2000-12-08

Applicant: LUCENT TECHNOLOGIES INC

Inventor： FISHMAN DANIEL A ,  HEISMAN FRED L ,  WILSON DAVID L

IPC: H04B10/02 ,  H04B10/18 ,  G02B6/34 ,  H04L25/06

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 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：DE60024208T2

公开(公告)日：2006-08-03

申请号：DE60024208

申请日：2000-12-08

Applicant: LUCENT TECHNOLOGIES INC

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

IPC: H04B10/02 ,  H04B10/18 ,  G02B6/34 ,  H04L25/06

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 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：DE69834787D1

公开(公告)日：2006-07-20

申请号：DE69834787

申请日：1998-09-08

Applicant: LUCENT TECHNOLOGIES INC

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

IPC: H04B10/02 ,  H04B10/135 ,  H04B3/06 ,  H04B10/18

公开(公告)号：DE60026626D1

公开(公告)日：2006-05-04

申请号：DE60026626

申请日：2000-12-08

Applicant: LUCENT TECHNOLOGIES INC

Inventor： FISHMAN DANIEL A ,  HEISMAN FRED L ,  WILSON DAVID L

IPC: H04B10/02 ,  H04B10/18 ,  G02B6/34 ,  H04L25/06

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 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：DE60024208D1

公开(公告)日：2005-12-29

申请号：DE60024208

申请日：2000-12-08

Applicant: LUCENT TECHNOLOGIES INC

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

IPC: H04B10/02 ,  H04B10/18 ,  H04L25/06 ,  G02B6/34

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 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：CA2245303C

公开(公告)日：2002-12-10

申请号：CA2245303

申请日：1998-08-19

Applicant: LUCENT TECHNOLOGIES INC

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

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 dela y that the optical signal experiences, but of different sign, and, therefore, essentially cancels out the undesired delay.

公开(公告)号：DE69802495D1

公开(公告)日：2001-12-20

申请号：DE69802495

申请日：1998-12-04

Applicant: LUCENT TECHNOLOGIES INC

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

IPC: G02F1/01 ,  H04B10/00 ,  H04B10/02 ,  H04L1/22 ,  H04M3/22 ,  H04Q3/52 ,  H04B10/08 ,  H04B10/24 ,  H04J14/02

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.