Method and apparatus for control of dpsk and dqpsk receivers...

H - Electricity – 04 – B

Patent

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H04B 1/02 (2006.01)

Patent

CA 2620836

An optical communication device such as a transmitter or receiver has a control loop for controlling relative phase of two related optical signals based on signal peak intensity. An optical transmitter measures the signal peak intensity of a combined optical signal representing two data channels to adjust relative phase as desired. An optical receiver measures the signal peak intensity of combined electrical signals, single electrical signals or single optical signals to adjust relative phase as desired. Signal peak intensity is minimized or maximized by adjusting the relative phase, depending upon the modulation configuration used. The feedback control provides a consistent and robust control to stabilize the optical communication device in the presence of variables such as temperature changes, aging and manufacturing tolerances .

L'invention concerne un dispositif de communication optique tel qu'un émetteur ou récepteur, comprenant une boucle d'asservissement permettant de commander la phase relative de deux signaux optiques liés sur la base de l'intensité en crête des signaux. Un émetteur optique mesure l'intensité en crête des signaux d'un signal optique combiné représentant deux canaux de données pour ajuster la phase relative comme souhaité. Un récepteur optique mesure l'intensité en crête des signaux électriques combinés, des signaux électriques individuels ou des signaux optiques individuels pour ajuster la phase relative comme souhaité. L'intensité en crête des signaux est réduite au minimum ou maximisée par ajustement de la phase relative, en fonction de la configuration de modulation utilisée. L'asservissement fournit une commande cohérente et robuste pour stabiliser le dispositif de communication optique en présence de variables telles que des changements de température, le vieillissement et les tolérances de fabrication.

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