Narrow-band optical modulator with reduced power requirement

Details Narrow-band optical modulator with reduced power requirement Narrow-band optical modulator with reduced power requirement

G - Physics

02

F

G02F 1/00 (2006.01) G02F 1/035 (2006.01) G02F 1/225 (2006.01)

Patent

CA 2301155

An optical modulator includes an optical waveguide (88) and an electrode structure coupled to the waveguide such that a modulating signal applied to the electrode structure (90, 92, 94) varies the refractive index of the waveguide so as to produce a modulated optical output signal. The electrode is fabricated in the form of a transmission line terminated in a short circuit (94). The ratio of the wavelength of the modulating signal to the effective length of the electrode is comprised between 2.1 and 4.0, and is preferably of approximately 2.7. The modulator can be constructed to provide either phase or amplitude modulation. An optical transmission method having SBS suppression and an optical modulator system are further provided.

Ce modulateur optique comprend un guide d'ondes optique (88) et une structure à électrode couplée au guide d'ondes de sorte qu'un signal modulateur appliqué à la structure à électrode (90, 92, 94) fasse varier l'indice de réfraction du guide d'ondes et produise un signal optique modulé de sortie. L'électrode est produite sous forme d'une ligne de transmission qui est fermée sur un court-circuit (94). Le rapport entre la longueur d'onde du signal modulateur et la longueur utile de l'électrode varie entre 2,1 et 4,0 et s'élève de préférence à environ 2,7. Le modulateur peut assurer une modulation en phase ou en amplitude. L'invention concerne également un procédé de transmission optique à suppression de la diffusion Brillouin stimulée et un système modulateur optique.

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