公开(公告)号：CA2331954A1

公开(公告)日：2001-08-29

申请号：CA2331954

申请日：2001-01-22

Applicant: LUCENT TECHNOLOGIES INC

Inventor： WERNER DIETER ,  ZHU MINGJUAN ,  DENKIN NATHAN MYRON ,  FEULNER MATTHIAS RICHARD ,  MA JIONG

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

Abstract: An apparatus and method are described for controlling response to power transients in an optically amplified wavelength division multiplexed (WDM) network when WDM optical channels are added and dropped, during network reconfigurations, during failure events, and so on. In one embodiment, a variable bandwidth filter circuit operates at a first prescribed bandwidth during a first time period io to detect a change in signal power (i.e;., power transient) caused by a transient event, and operates at a second prescribed bandwidth that is less than the first prescribed bandwidth after the first period of time elapses, e.g., to + .DELTA.t, to substantially suppress low level signal variations, such as remnants of the power transient. In this way, the power transient related to the actual transient event will be preserved to trigger control circuitry, e.g., amplifier gain control base d on input power changes, while the remnants will be filtered out to prevent unwanted responses by the control circuitry, e.g., remnants misinterpreted as actual transient events.

公开(公告)号：CA2331954C

公开(公告)日：2006-10-31

申请号：CA2331954

申请日：2001-01-22

Applicant: LUCENT TECHNOLOGIES INC

Inventor： FEULNER MATTHIAS RICHARD ,  DENKIN NATHAN MYRON ,  MA JIONG ,  WERNER DIETER ,  ZHU MINGJUAN

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

Abstract: An apparatus and method are described for controlling response to power transients in an optically amplified wavelength division multiplexed (WDM) network when WDM optical channels are added and dropped, during network reconfigurations, during failure events, and so on. In one embodiment, a variable bandwidth filter circuit operates at a first prescribed bandwidth during a first time period io to detect a change in signal power (i.e;., power transient) caused by a transient event, and operates at a second prescribed bandwidth that is less than the first prescribed bandwidth after the first period of time elapses, e.g., .TAU.0 + .DELTA..TAU. to substantially suppress low level signal variations, such as remnants of the power transient. In this way, the power transient related to the actual transient event will be preserved to trigger control circuitry, e.g., amplifier gain control base d on input power changes, while the remnants will be filtered out to prevent unwanted responses by the control circuitry, e.g., remnants misinterpreted as actual transient events.