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1. WO2006095395 - OPTICAL SURGE SUPPRESSION OPTICAL AMPLIFIER

Publication Number WO/2006/095395
Publication Date 14.09.2006
International Application No. PCT/JP2005/003859
International Filing Date 07.03.2005
IPC
H01S 3/067 2006.01
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
SDEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
3Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
05Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
06Construction or shape of active medium
063Waveguide lasers, e.g. laser amplifiers
067Fibre lasers
H01S 3/10 2006.01
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
SDEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
3Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
10Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
CPC
H01S 3/06716
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
SDEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
3Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
05Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
06Construction or shape of active medium
063Waveguide lasers, ; i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
067Fibre lasers
06708Constructional details of the fibre, e.g. compositions, cross-section, shape or tapering
06716Fibre compositions
H01S 3/06758
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
SDEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
3Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
05Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
06Construction or shape of active medium
063Waveguide lasers, ; i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
067Fibre lasers
06754Fibre amplifiers
06758Tandem amplifiers
H01S 3/094092
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
SDEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
3Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
09Processes or apparatus for excitation, e.g. pumping
091using optical pumping
094by coherent light
094092Upconversion pumping
H01S 3/10015
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
SDEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
3Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
10Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
10007in optical amplifiers
10015by monitoring or controlling, e.g. attenuating, the input signal
H01S 3/13013
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
SDEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
3Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
10Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
13Stabilisation of laser output parameters, e.g. frequency, amplitude
1301in optical amplifiers
13013by controlling the optical pumping
H01S 3/1305
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
SDEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
3Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
10Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
13Stabilisation of laser output parameters, e.g. frequency, amplitude
1305Feedback control systems
Applicants
  • 富士通株式会社 FUJITSU LIMITED [JP]/[JP] (AllExceptUS)
  • 尾中 美紀 ONAKA, Miki [JP]/[JP] (UsOnly)
  • 林 悦子 HAYASHI, Etsuko [JP]/[JP] (UsOnly)
Inventors
  • 尾中 美紀 ONAKA, Miki
  • 林 悦子 HAYASHI, Etsuko
Agents
  • 笹島 富二雄 SASAJIMA, Fujio
Priority Data
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) OPTICAL SURGE SUPPRESSION OPTICAL AMPLIFIER
(FR) AMPLIFICATEUR OPTIQUE À SUPPRESSION DE POINTE D’ÉNERGIE OPTIQUE
(JA) 光サージ抑圧型光増幅器
Abstract
(EN)
When an optical surge suppression optical amplifier is a WDM optical amplifier having a multistage amplifying structure where a plurality of optical amplifying means are connected in series, an optical amplifying medium capable of producing a homogeneous up conversion (HUC) phenomenon is used for the optical amplifying means on the signal light output side. Therefore, by using the decrease of the gain efficiency due to the HUC occurring when the input power is lowered, the optical surge is suppressed. When the optical surge suppression optical amplifier is a one-wave optical amplifier, an optical amplifying medium capable of producing a pair induced quenching (PIQ) phenomenon is used for the optical amplifying means on the signal light input side. Therefore, by using the decrease of the output efficiency due to the PIQ occurring when the input power is increased, the optical surge is suppressed. With this, a low-cost optical amplifier enabling effective suppression of an optical surge without using complex constitutions for the control circuit and the optical circuit is provided.
(FR)
Si un amplificateur optique à suppression de pointe d’énergie optique est un amplificateur optique WDM d’une structure d’amplification multi-étage dans laquelle une pluralité de moyens d’amplification optiques sont connectés en série, un support d’amplification optique capable de produire un phénomène homogène de conversion vers le haut (HUC) sert au moyen d’amplification optique sur le côté sortie de lumière de signal. Ainsi, la baisse de l’efficacité de gain due à la conversion homogène vers le haut survenant lors de la réduction de puissance d’entrée permet de supprimer la pointe d’énergie optique. Si l’amplificateur optique à suppression de pointe d’énergie optique est un amplificateur optique à une seule onde, un support d’amplification optique capable de produire un phénomène d’extinction induite par paire (PIQ) sert pour le moyen d’amplification optique sur le côté entrée de lumière de signal. Ainsi, la baisse de l’efficacité de sortie due à l’extinction induite par paire lors de l’augmentation de la puissance d’entrée permet de supprimer la pointe d’énergie optique. Ainsi, on obtient un amplificateur optique à faible coût permettant une suppression effective d’une pointe d’énergie optique sans utiliser de constitutions complexes pour le circuit de commande et le circuit optique.
(JA)
 本発明の光サージ抑圧型光増幅器は、複数の光増幅手段が直列に接続された多段増幅構成のWDM用光増幅器について、信号光出力側の光増幅手段に対し、ホモジニアス・アップコンバージョン(HUC)現象を発生可能な光増幅媒体を適用することで、入力パワー低下時に発生するHUCによる利得効率の低下を利用して光サージを抑圧する。また、1波用光増幅器については、信号光入力側の光増幅手段に対し、ペア・インデュースド・クエンチング(PIQ)現象を発生可能な光増幅媒体を適用することで、入力パワー上昇時に発生するPIQによる出力効率の低下を利用して光サージを抑圧する。これにより、制御回路や光回路構成を複雑化させずに、光サージを効果的に抑圧できる低コストの光増幅器を提供できる。
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