Method of and device for controlling the phase of a clock...

Details Method of and device for controlling the phase of a clock... Method of and device for controlling the phase of a clock...

H - Electricity

04

L

H04L 7/033 (2006.01) H04B 10/12 (2006.01) H04L 7/00 (2006.01)

Patent

CA 2220244

The signal to be controlled is sent along an optical fibre (3) by means of a wavelength tunable laser (2) whose emission wavelength may be varied as a function of a possible phase variation in the received signal with respect to a reference phase. At the receiving end of the fibre a control signal is generated by extracting a fraction of the power associated with the received signal and sending such fraction back towards the transmitting end, and at the transmitting end the phase of said fraction is compared with that of the original signal and the tunable laser is driven (2) in such a way as to transmit at a wavelength such that the clock information reaches the receiving end with the reference phase.

Le signal à commander est envoyé le long d'une fibre optique (3) au moyen d'un laser accordable en longueur d'onde (2) dont la longueur d'onde d'émission peut être variée en fonction d'une variation de phase possible dans le signal reçu par rapport à une phase de référence. € l'extrémité réceptrice de la fibre, un signal de commande est produit par extraction d'une fraction de la puissance associée au signal reçu et le renvoi de cette fraction vers l'extrémité émettrice, où la phase de ladite fraction est comparée avec celle du signal originel et le laser accordable est attaqué (2) pour qu'il transmette sur une longueur d'onde permettant à l'information de base de temps d'atteindre l'extrémité réceptrice avec la phase de référence.

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