公开(公告)号：JP2001274755A

公开(公告)日：2001-10-05

申请号：JP2001051336

申请日：2001-02-27

Applicant: LUCENT TECHNOLOGIES INC

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

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

Abstract: PROBLEM TO BE SOLVED: To provide a system and a method for controlling reactions with respect to a power transient phenomenon in a wavelength division multiplex(WDM) network, whose signal is optically amplified during network reconfiguration or on the occurrence of a failure, when a WDM channel is added or deleted. SOLUTION: A variable band width filter circuit 500 is operated by a first prescribed band width for a first period τ0 to detect a change (power transient phenomenon) in a signal power caused by an event of a transient phenomenon and operated by a second specified band width narrower than the first prescribed band width for a period τ0+Δτ after the lapse of the first period to nearly suppress a low level signal change such as a remnant of the power transient phenomenon. Thus, the actual power transient phenomenon is maintained to start amplifier gain control based on the change in input power while the remnant is eliminated by preventing the remnant from being interpreted in mistake as an actual transient phenomenon event phenomenon.

公开(公告)号：DE60001444D1

公开(公告)日：2003-03-27

申请号：DE60001444

申请日：2000-09-11

Applicant: LUCENT TECHNOLOGIES INC

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

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 tau 0 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 + INCREMENT 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 based 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：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.

公开(公告)号：DE60001444T2

公开(公告)日：2003-11-20

申请号：DE60001444

申请日：2000-09-11

Applicant: LUCENT TECHNOLOGIES INC

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

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 tau 0 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 + INCREMENT 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 based 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.