Method and apparatus for generating mid-ir laser for...

G - Physics – 01 – N

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G01N 21/17 (2006.01) G01N 29/24 (2006.01)

Patent

CA 2724314

A method of ultrasonic testing comprising conditioning a radiation wave from a laser source by efficiently convert-ing the radiation wave's wavelength to a mid-IR wavelength for enhanced ultrasonic testing of a composite. The method includes passing the radiation wave through a first optical frequency converter where the radiation wave is converted into a signal wave and an idler wave, where the idler wave is at a mid-IR wavelength. The method further includes directing the signal and idler waves to a second optical frequency converter where the signal wave wavelength is converted to a mid-IR wavelength which com-bines with the idler wave to form a generation wave. The generation wave is directed at a composite surface to be tested.

L'invention concerne un procédé d'essai aux ultrasons qui comprend: conditionnement d'une onde de rayonnement émise par une source laser par conversion efficace de sa longueur d'onde en une longueur d'onde dans l'infrarouge moyen, en vue de soumettre un composite à un essai aux ultrasons amélioré; passage de l'onde de rayonnement par un premier convertisseur de fréquence optique dans lequel l'onde de rayonnement est transformée en onde signal et en onde complémentaire, cette dernière se situant dans la longueur d'onde de l'infrarouge moyen; orientation de l'onde signal et de l'onde complémentaire vers un second convertisseur de fréquence optique dans lequel la longueur d'onde de l'onde signal est transformée en longueur d'onde dans l'infrarouge moyen qui s'additionne à l'onde complémentaire pour former une onde d'émission; et enfin, orientation de l'onde d'émission sur une surface d'un composite devant être soumis à l'essai.

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