In line periodically poled linbo3 (ppln), optical parametric...

G - Physics – 02 – F

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G02F 1/39 (2006.01) G02F 1/35 (2006.01)

Patent

CA 2324392

The present invention relates generally to the field of optical devices and particularly to embodiments of a three-stage PPLN optical parametric oscillator/difference-frequency generator configuration. The present invention allows simultaneous generation of three wavelengths in efficient use of the pump signal (36). The structure of the first embodiment of the present invention comprises a first PPLN element (28) having first and second grating regions (20, 22), and a second PPLN element (30) having its own grating period (24). An input coupler (32) is positioned at the input and exit ends of a resonator cavity (26) and the first PPLN element (28) is positioned between the input coupler (32) and the second PPLN element (30).

La présente invention concerne généralement le domaine des dispositifs optiques et particulièrement des modes de réalisation d'une structure générateur de fréquence différence/oscillateur paramétrique optique PPLN à trois étages. La présente invention permet la production simultanée de trois longueurs d'onde par usage efficace du signal de pompe (36). Dans un premier mode de réalisation de la présente invention, ladite structure comporte un premier élément PPLN (28) ayant des première et seconde régions de diffraction (20, 22) et un second élément PPLN (30) ayant sa propre période de diffraction (24). Un coupleur d'entrée (32) est placé aux extrémités d'entrée et de sortie d'une cavité résonante (26) et le premier élément PPLN (28) est placé entre le coupleur d'entrée (32) et le second élément PPLN (30).

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