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1. WO2002019572 - METHOD FOR STARTING UP OPTICAL COMMUNICATION SYSTEM, METHOD FOR EXTENDING/REDUCING CHANNELS, AND COMPUTER READABLE RECORDED MEDIUM

Publication Number WO/2002/019572
Publication Date 07.03.2002
International Application No. PCT/JP2000/005912
International Filing Date 31.08.2000
IPC
H04B 10/07 2013.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
10Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
07Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
H04B 10/29 2013.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
10Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
29Repeaters
H04B 10/293 2013.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
10Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
29Repeaters
291in which processing or amplification is carried out without conversion of the main signal from optical form
293Signal power control
H04B 10/296 2013.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
10Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
29Repeaters
291in which processing or amplification is carried out without conversion of the main signal from optical form
293Signal power control
294in a multiwavelength system, e.g. gain equalisation
296Transient power control, e.g. due to channel add/drop or rapid fluctuations in the input power
H04B 10/564 2013.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
10Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
50Transmitters
564Power control
H04B 10/572 2013.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
10Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
50Transmitters
572Wavelength control
CPC
H04B 10/2942
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
10Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
29Repeaters
291in which processing or amplification is carried out without conversion of the main signal from optical form
293Signal power control
294in a multiwavelength system, e.g. gain equalisation
2942using automatic gain control [AGC]
H04B 2210/258
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
2210Indexing scheme relating to optical transmission systems
25Distortion or dispersion compensation
258treating each wavelength or wavelength band separately
H04J 14/021
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
JMULTIPLEX COMMUNICATION
14Optical multiplex systems
02Wavelength-division multiplex systems
0201Add-and-drop multiplexing
0202Arrangements therefor
021Reconfigurable arrangements, e.g. reconfigurable optical add/drop multiplexers [ROADM] or tunable optical add/drop multiplexers [TOADM]
H04J 14/0213
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
JMULTIPLEX COMMUNICATION
14Optical multiplex systems
02Wavelength-division multiplex systems
0201Add-and-drop multiplexing
0202Arrangements therefor
0213Groups of channels or wave bands arrangements
H04J 14/0221
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
JMULTIPLEX COMMUNICATION
14Optical multiplex systems
02Wavelength-division multiplex systems
0221Power control, e.g. to keep the total optical power constant
Applicants
  • FUJITSU LIMITED [JP]/[JP] (AllExceptUS)
  • TSUDA, Takashi [JP]/[JP] (UsOnly)
  • YAMANE, Kazuo [JP]/[JP] (UsOnly)
  • MURAKAMI, Makoto [JP]/[JP] (UsOnly)
  • SHIMA, Tooru [JP]/[JP] (UsOnly)
  • MATSUMOTO, Tooru [JP]/[JP] (UsOnly)
  • IWAKI, Hiroyuki [JP]/[JP] (UsOnly)
  • IMAI, Kazuto [JP]/[JP] (UsOnly)
Inventors
  • TSUDA, Takashi
  • YAMANE, Kazuo
  • MURAKAMI, Makoto
  • SHIMA, Tooru
  • MATSUMOTO, Tooru
  • IWAKI, Hiroyuki
  • IMAI, Kazuto
Agents
  • FURUYA, Fumio
Priority Data
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) METHOD FOR STARTING UP OPTICAL COMMUNICATION SYSTEM, METHOD FOR EXTENDING/REDUCING CHANNELS, AND COMPUTER READABLE RECORDED MEDIUM
(FR) PROCEDE DE DEMARRAGE D'UN SYSTEME DE COMMUNICATION OPTIQUE, PROCEDE D'AGRANDISSEMENT/DE REDUCTION DE CANAUX, ET SUPPORT ENREGISTRE LISIBLE PAR UN ORDINATEUR
Abstract
(EN)
A method for starting up an optical system provided with a plurality of optical relay stations having an optical amplifier between optical transmission lines for transmitting wavelength division multiplexing optical signals comprises a step (S6) for imparting a desired slope to the gain-wavelength curve of the optical amplifier within a desired wavelength range, a step (S7) for regulating the output from the optical amplifier to a desired level, a step (S8) for carrying out these two steps for the plurality of optical relay stations sequentially from the first one to the last one, and a step (S11) for regulating the level of each optical signal such that the optical signal-to-noise ratio is practically constant of the received wavelength division multiplexing optical signals. Gain slope compensation, output control and preemphasis control are performed appropriately by starting up an optical communication system according to such a procedure.
(FR)
L'invention concerne un procédé de démarrage d'un système de communication optique doté de plusieurs stations relais optiques ayant un amplificateur optique entre des lignes de transmission optique destinées à transmettre des signaux optiques à multiplexage en longueur d'onde. Le procédé consiste à donner une pente désirée à la courbe à longueur d'ondes à gain de l'amplificateur optique, comprise dans une plage de longueurs d'ondes souhaitée (S6), à réguler la sortie de l'amplificateur optique à un niveau souhaité (S7), à réaliser ces deux étapes séquentiellement pour toutes les stations relais optiques de la première à la dernière (S8), et à réguler le niveau de chaque signal optique, de façon que le rapport signal optique sur bruit soit quasi constant par rapport à celui des signaux optiques à multiplexage en longueur d'onde reçus (S11). Le démarrage d'un système de communication optique selon la présente invention permet une compensation de pente de gain, une commande de sortie et une commande de préaccentuation adéquates.
Also published as
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