公开(公告)号：JP2001223647A

公开(公告)日：2001-08-17

申请号：JP2000396383

申请日：2000-12-27

Applicant: LUCENT TECHNOLOGIES INC

Inventor： BODE DIRK ,  HYUN VICTOR S ,  ISRAEL JOHN G ,  LINGNER GERARD III ,  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 ,  H04B10/16

Abstract: PROBLEM TO BE SOLVED: To improve the reaction of conventional optical amplifiers on the downstream in an optical transmission system, having the optical amplifiers placed along an optical transmission path, when the optical amplifiers encounters a change in the intensity level of an input optical signal. SOLUTION: Each of a series of the optical amplifiers is adjusted, so as to regulate a specific amplifier parameter at a small step in reaction to the detection of a specific stimulus, caused by an input or the reception of a regulation start message from an upstream amplifier and to complete the regulation at a large step when no regulation start message is received within a prescribed time elapse from the start of the regulation reacting to the detection of the stimulus. Receiving the regulation start message, each optical amplifier continues the regulation, and completes the regulation at a large step, when a regulation end message has been received from the up-stream optical amplifier. Each optical amplifier transmits regulation end message to the next, downstream amplifier, if the optical amplifier is not the end amplifier at thst time.

公开(公告)号：JP2000277834A

公开(公告)日：2000-10-06

申请号：JP2000063059

申请日：2000-03-08

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 ,  H04B10/16

Abstract: PROBLEM TO BE SOLVED: To compensate for Raman effect by producing a gain inclined against Raman inclination in advance and applying the inclined gain to the spectrum of optical signals transmitted through an optical fiber. SOLUTION: A gain inclined against Raman inclination in advance is produced and the inclined gain is applied to the spectrum of optical signals transmitted through an optical fiber. For example, when an optical signal is transmitted from the output of an optical amplifier 100-i, e.g. 100-1, the gain is inclined at the low end of spectrum. Then a receiving optical amplifier, for example, an amplifier 100-2 amplifies a received signal and processes it again so that the power level of the optical signal is preliminarily inclined against Raman inclination produced in a transmitted light transmission line. With this constitution Raman effect can be offset.

公开(公告)号：CA2328284A1

公开(公告)日：2001-06-30

申请号：CA2328284

申请日：2000-12-11

Applicant: LUCENT TECHNOLOGIES INC

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

公开(公告)号：DE69838127T2

公开(公告)日：2008-05-15

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：DE60034618D1

公开(公告)日：2007-06-14

申请号：DE60034618

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 ,  H04B10/17 ,  H01S3/06 ,  H01S3/10 ,  H01S3/30 ,  H04B10/02 ,  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：DE60023044D1

公开(公告)日：2005-11-10

申请号：DE60023044

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：DE60034618T2

公开(公告)日：2008-01-31

申请号：DE60034618

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 ,  H04B10/17 ,  H01S3/06 ,  H01S3/10 ,  H01S3/30 ,  H04B10/02 ,  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：DE60023044T2

公开(公告)日：2006-06-22

申请号：DE60023044

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 ,  H04B10/17 ,  H01S3/06 ,  H01S3/10 ,  H04B10/04 ,  H04B10/06 ,  H04B10/14 ,  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：DE60019540T2

公开(公告)日：2006-02-23

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：CA2254544C

公开(公告)日：2002-04-16

申请号：CA2254544

申请日：1998-11-26

Applicant: LUCENT TECHNOLOGIES INC

Inventor： TEICHMANN BERND ,  BODE DIRK ,  ZHOU JIANHUI

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 signal s 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 o f 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.