公开(公告)号：EP1949569B1

公开(公告)日：2013-08-21

申请号：EP06790637.0

申请日：2006-09-05

申请人： Ciena Luxembourg S.a.r.l.

发明人： BONTU, Chandra ,  O'SULLIVAN, Maurice ,  ROBERTS, Kim B. ,  SUN, Han ,  WU, Kuang Tsan

IPC分类号： H04J14/06 ,  H04B10/60 ,  H04L7/04

CPC分类号： H04B10/2572 ,  H04B10/60 ,  H04B10/6161 ,  H04B10/6162 ,  H04B10/64 ,  H04J14/06 ,  H04L7/041

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：EP2335366A1

公开(公告)日：2011-06-22

申请号：EP09820149.4

申请日：2009-10-15

申请人： Ciena Luxembourg S.a.r.l.

发明人： BOERTJES, David ,  ROBERTS, Kim B. ,  O'SULLIVAN, Maurice ,  BORDOGNA, Giuseppe

IPC分类号： H04J14/02 ,  H04Q11/02

CPC分类号： H04Q11/0005 ,  H04J14/0206 ,  H04J14/0209 ,  H04J14/021 ,  H04J14/0212 ,  H04J14/0213 ,  H04J14/0217 ,  H04Q2011/0015 ,  H04Q2011/0016

摘要： IIn an Optical Add-Drop Multiplexer, a drop section comprises a Wavelength Selective Switch (WSS) having at least one drop-port, the WSS being operative to couple a respective set of w (where w>1) wavelength channels from a received Wavelength Division Multiplexed (WDM) signal to each drop port. A respective 1:s power splitter is associated with each drop port. Each power splitter supplies the respective set of channels received from its drop port to each one of a corresponding set of coherent receivers. Each coherent receiver operates to receive a selected one of the respective set of channels.