High speed, silicon-based electro-optic modulator

H - Electricity – 04 – B

Patent

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H04B 10/04 (2006.01)

Patent

CA 2523298

An electro-optic modulator arrangement for achieving switching speeds greater than 1 Gb/s utilizes pre-emphasis pulses to accelerate the change in refractive index of the optical waveguide used to form the electro-optic modulator. In one embodiment, a feedback loop may be added to use a portion of the modulated optical output signal to adjust the magnitude and duration of the pre-emphasis pulses, as well as the various reference levels used for modulated. For free carrier-based electro~-optic modulators, including silicon- based electro-optic modulators, the pre-emphasis pulses are used to accelerate the movement of free carriers at the transitions between input signal data values.

Modulateur électro-optique permettant d'atteindre des vitesses de commutation supérieures à 1 Gb/s et mettant en application des impulsions de pré-accentuation afin d'accélérer la variation de l'indice de réfraction du guide d'ondes optique servant à constituer ce modulateur. Dans un mode de réalisation, il est possible d'ajouter une boucle de rétroaction afin d'utiliser une partie du signal de sortie optique modulé pour régler l'intensité et la durée de ces impulsions, ainsi que les différents niveaux de référence présents dans la modulation. En ce qui concerne des modulateurs électro-optiques basés sur des porteurs libres, y compris des modulateurs électro-optiques à base de silicium, les impulsions de pré-accentuation servent à accélérer le déplacement de ces porteurs libres au niveau des transitions entre les valeurs des données de signalisation d'entrée.

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