Optical fiber amplifier for controlling gain flatness

Details Optical fiber amplifier for controlling gain flatness Optical fiber amplifier for controlling gain flatness

H - Electricity

01

S

H01S 3/067 (2006.01) G02F 1/39 (2006.01) H01S 3/13 (2006.01) H04B 10/17 (2006.01) H04B 10/18 (2006.01)

Patent

CA 2352344

An optical fiber amplifier for controlling gain flatness including an optical fiber amplifying unit (120) for amplifying input signal light according to a predetermined amplification control value, a measuring unit (130) for measuring the power level of amplified spontaneous emission (ASE) at a predetermined wavelength band output from the optical fiber amplifying unit (120), and a gain controller (140) for controlling the amplification control value of the optical fiber amplifying unit (120) according to the measured power level of the ASE to flatten the gain of the optical fiber amplifying unit (120). The gain flatness of amplified signal light is monitored and controlled, thereby obtaining gain-flattened signal light even when power level of signal light varies from wavelength to wavelength.

L'invention porte sur un amplificateur à fibre optique régulant la planéité de la courbe de gain comportant une unité amplificatrice(120) à fibre optique amplifiant la lumière du signal d'entrée selon un rapport d'amplification prédéterminé, une unité (130) mesurant le niveau de puissance de l'émission spontanée amplifiée (ASE) pour une plage de longueurs d'onde prédéterminée du signal de sortie de l'unité amplificatrice (120), et un régulateur de gain (140) régulant le rapport d'amplification en fonction du résultat de la mesure du niveau de puissance de l'émission spontanée amplifiée (ASE). La planéité de la courbe de gain du signal lumineux amplifié est suivie et réglée de manière à obtenir un signal lumineux à gain plat, même lorsque sa puissance varie de longueur d'onde en longueur d'onde.

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