Optical device for generating polychromatic light

G - Physics – 02 – F

Patent

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G02F 1/35 (2006.01)

Patent

CA 2752995

The invention relates to an optical device forming a polychromatic light generator, including a laser source capable of providing a pump radiation at a first frequency and a microstructured optical fibre having a core that comprises at least a first and second region. The first and second region have respective chemical compositions arranged so as to define a phase matching such that, in the event of non-linear mode excitation by the pump radiation, the fibre provides a polychromatic light output mainly consisting of the pump radiation as well as of radiation resulting from the pump radiation by a four-wave mixing non-linear effect.

Un dispositif optique formant générateur de lumière polychromatique, comprend une source laser propre à délivrer un rayonnement de pompe à une première fréquence, et une fibre optique microstructurée, dont le coeur comporte au moins une première et une deuxième régions. Lesdites première et deuxième régions présentent des compositions chimiques respectives agencées pour définir un accord de phase tel, qu'en cas d'excitation en régime non linéaire par le rayonnement de pompe, la fibre délivre en sortie une lumière polychromatique principalement constituée à partir du rayonnement de pompe, ainsi que de rayonnements tirés du rayonnement de pompe par effet non linéaire du type mélange à quatre ondes.

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