Glass fiber laser system using u-doped crystal q-switch

H - Electricity – 01 – S

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H01S 3/091 (2006.01) H01S 3/067 (2006.01) H01S 3/113 (2006.01) H01S 3/0941 (2006.01)

Patent

CA 2195598

A glass fiber laser system includes a laser resonator cavity having a resonant path and an erbium-doped glass fiber lasing element with an output of from about 1.5 to about 1.6 micrometers within the laser resonator cavity. A light source directed into an input end of the glass fiber lasing element optically pumps the lasing element to emit light. A passive Q-switch lies along the resonant path within the laser resonator cavity. The Q-switch is formed of a host material having a concentration of uranium ions therein, so as to be a saturable absorber of the light emitted by the lasing element. The Q-switch is preferably a uranium-doped fluoride crystal such as U:CaF2, U:SrF2, or U:BaF2.

'invention est un laser comportant une cavité résonante ayant une trajet de résonance et un élément actif à fibre de verre dopée à l'erbium produisant une lumière dont la longueur d'onde varie entre 1,5 micromètre approximativement et 1,6 micromètre approximativement dans la cavité résonante. Une source lumineuse dont la lumière est dirigée sur l'extrémité d'entrée de l'élément actif soumet ce dernier à un pompage optique pour lui faire émettre de la lumière. Un Q-switch passif est monté sur le trajet de résonance de la cavité. Ce Q-switch est fait d'un matériau hôte contenant des ions d'uranium qui en font un absorbeur saturable pour la lumière produite par l'élément actif. De préférence, on choisit pour le Q-switch un cristal de fluorure dopé à l'uranium tel que U:CaF2, U:SrF2 ou U:BaF2.

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