Optical amplifier with power dependent feedback

H - Electricity – 04 – B

Patent

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Details

H04B 10/17 (2006.01) H01S 3/13 (2006.01) H04J 14/02 (2006.01) H04Q 11/00 (2006.01)

Patent

CA 2357496

An optical amplifier includes an optical feedback resonant laser cavity (OFRC) including a power dependent loss element (PDLE) having the characteristic that as the incident laser power on the PDLE increases the cavity loss decreases. The OFRC with the PDLE provides optical gain control or optical power control for a WDM amplifier or a single channel power equalization amplifier (PEA), respectively. A 1xNxN WADM node incorporating more than one of these amplifiers, at least some of which commonly share a pump source, and a method for controlling a transient power change in a single channel optical amplifier or reducing a DC gain error in a WDM optical amplifier that are subject to dynamically variable operating conditions at an input of the amplifier, are also disclosed.

L'invention concerne un amplificateur optique qui comprend une cavité laser résonante à retour optique (OFRC) comportant un élément à pertes dépendant de la puissance (PDLE). Ledit élément à pertes possède une caractéristique selon laquelle, quand la puissance laser incidente qui lui est appliquée augmente, les pertes de la cavité diminuent. L'amplificateur pourvu du PDLE assure la commande du gain optique ou de la puissance optique pour un amplificateur à multiplexage par répartition en longueur d'onde (WDM) ou un amplificateur égaliseur de puissance monocanal (PEA). L'invention concerne également un noeud 1xNxN WADM comportant plus d'un desdits amplificateurs, dont au moins certains partagent une source de pompage de la manière habituelle; et un procédé qui permet de commander un changement de puissance transitoire dans un amplificateur de puissance monocanal ou de réduire l'erreur de gain courant continu dans un amplificateur WDM soumis à des conditions de fonctionnement variant de manière dynamique à l'entrée dudit amplificateur.

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