Gain equalizer, light amplifier and optical communication...

Details Gain equalizer, light amplifier and optical communication... Gain equalizer, light amplifier and optical communication...

H - Electricity

01

S

H01S 3/10 (2006.01) H01S 3/067 (2006.01) H04B 10/17 (2006.01)

Patent

CA 2355063

A fiber amplifier uses an erbium-doped fiber core (1) in which a plurality of long-period fiber gratings (21) functioning as a gain equalizer are formed by an ultraviolet laser. Each of the fiber gratings (21) is irradiated with ultraviolet laser through the cladding layer of the optical fiber core (1) to provide periodic modulation for the refractive index of the fiber core. The fiber gratings (21) in the core (1) compensate for the wavelength dependency of gain to provide flat gain, resulting in uniform and efficient amplification over a wide range.

L'invention porte sur un amplificateur à fibres comportant une âme (1) de fibre dopée à l'erbium et plusieurs réseaux (21) de fibres de période longue fonctionnant comme égaliseurs de gain et commandés par un laser à UV. Chacun des réseaux de fibres (21) est irradié par le laser à UV à travers la couche d'enrobage de l'âme (1) de manière à produire une modulation périodique de l'indice de réfraction de l'âme (1). Le réseau (21) de fibres de l'âme (1) compense la dépendance du gain de la longueur d'onde, ce qui assure un gain linéaire et une amplification efficace sur une plage étendue.

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