公开(公告)号：DE69838127D1

公开(公告)日：2007-09-06

申请号：DE69838127

申请日：1998-01-27

Applicant: LUCENT TECHNOLOGIES INC

Inventor： BODE DIRK ,  ZHOU JIANHUI ,  TEICHMANN BERND

IPC: H04J14/00 ,  H04J14/02 ,  H04B10/07 ,  H04B10/29 ,  H04B10/294

Abstract: The present invention relates generally to the field of optical transmission and particularly to a method and a system for controlling optical amplification in wavelength division multiplex optical transmission. WDM systems currently under development will have eighty or more channels, i. e. modulated optical signals with different wavelengths (known as Dense Wavelength Division Multiplexing, DWDM). These DWDM systems are demanding optical amplifiers which, especially considering the cascadation of a plurality of optical amplifiers along the transmission path of the DWDM system, have only very limited tolerances in certain parameters. Among these parameters gain flatness and gain tilt are of special importance. The present invention discloses a method and a system which make use of auxiliary optical signals having a given power level which is equal for all auxiliary signals. Differences in the power levels of the auxiliary signals after optical amplification are used for the control of the optical amplifiers of the WDM system.

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：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：CA2254544A1

公开(公告)日：1999-07-27

申请号：CA2254544

申请日：1998-11-26

Applicant: LUCENT TECHNOLOGIES INC

Inventor： TEICHMANN BERND ,  ZHOU JIANHUI ,  BODE DIRK

IPC: H04J14/00 ,  H04B10/07 ,  H04B10/29 ,  H04B10/294 ,  H04J14/02 ,  H04B10/17

Abstract: The present invention relates generally to the field of optical transmission and particularly to a method and a system for controlling optical amplification in wavelength division multiplex optical transmission. WDM systems currently under development will have eighty or more channels i. e. modulated optical signals with different wavelengths (known as Dense Wavelength Division Multiplexing DWDM). These DWDM systems are demanding optical amplifiers which especially considering the cascadation of a plurality of optica l amplifiers along the transmission path of the DWDM system have only very limited tolerances in certain parameters. Among these parameters gain flatness and gain tilt are of special importance. The present invention discloses a method and a system which make use of auxiliar y optical signals having a given power level which is equal for all auxiliary sign als. Differences in the power levels of the auxiliary signals after optical amplifica tion are used for the control of the optical amplifiers of the WDM system.

公开(公告)号：DE60019540D1

公开(公告)日：2005-05-25

申请号：DE60019540

申请日：2000-12-12

Applicant: LUCENT TECHNOLOGIES INC

Inventor： BODE DIRK ,  HYUN VICTOR S ,  ISRAEL JOHN G ,  LINGNER GERARD T ,  MCKAY BRADLEY A ,  NADHUMI PRASANNA R ,  THOMPSON WILLIAM A

IPC: G02F1/35 ,  H01S3/06 ,  H01S3/10 ,  H04B10/04 ,  H04B10/06 ,  H04B10/14 ,  H04B10/17 ,  H04B10/29 ,  H04J14/08

Abstract: Each of a series of optical amplifiers is arranged such that, in response to detecting particular stimuli occurring at an input or receipt of an adjustment start message from an upstream amplifier, adjusts certain amplifier parameters using small steps and completes the adjustment using large steps if it does not receive the adjustment start message within a predetermined period of time of starting the adjustment in response to detecting the stimuli. If the optical amplifier receives the adjustment start message, then it continues to perform the adjustment and completes the adjustment using large steps when it receives an adjustment done message from the upstream optical amplifier. At that point, the optical amplifier sends an adjustment done message to the next downstream amplifier if it is not the tail-end amplifier.

公开(公告)号：CA2328284C

公开(公告)日：2005-02-08

申请号：CA2328284

申请日：2000-12-11

Applicant: LUCENT TECHNOLOGIES INC

Inventor： BODE DIRK ,  ISRAEL JOHN G ,  THOMPSON WILLIAM A ,  HYUN VICTOR S ,  NADHAMUNI PRASANNA RAGHAVAN ,  MCKAY BRADLEY A ,  LINGNER GERARD T III

IPC: G02F1/35 ,  H01S3/06 ,  H01S3/10 ,  H04B10/04 ,  H04B10/06 ,  H04B10/14 ,  H04B10/17 ,  H04B10/29 ,  H04J14/08

Abstract: Each of a series of optical amplifiers is arranged such that, in response to detecting particular stimuli occurring at an input or receipt of an adjustme nt start message from an upstream amplifier, adjusts certain amplifier parameters usi ng small steps and completes the adjustment using large steps if it does not receive the adjustment start message within a predetermined period of time of starting the adjustme nt in response to detecting the stimuli. If the optical amplifier receives the adjustment start message, then it continues to perform the adjustment and completes the adjustment using large steps when it receives an adjustment done message from the upstream optical amplifier. At that point, the optical amplifier sends an adjustment done message to the next downstream amplifier if it is not the tail-end amplifier.