Optical signal source wavelength stabilization system and...

Details Optical signal source wavelength stabilization system and... Optical signal source wavelength stabilization system and...

H - Electricity

01

S

H01S 5/0687 (2006.01) H01S 3/13 (2006.01) H01S 3/131 (2006.01)

Patent

CA 2611559

Apparatus for stabilizing wavelength of an optical signal output from an optical signal source (12) comprises an optical fiber arranged (14) to receive an optical signal from the optical signal source (12) and an optical tap (16) arranged to couple a control signal out of the optical fiber (14). An optical signal splitter (22) is arranged to divide the control portion into a first portion having a wavelength-dependent intensity I1 and a second portion having a wavelength-dependent intensity I2. A control circuit (28) is arranged to compute a ratio R = I1/ I2 and to send an error signal to the optical signal source (12) if wavelength drift in the optical signal source (12) causes the ratio R to deviate from a predetermined set point.

L'invention porte sur un appareil de stabilisation de la longueur d'onde d'un signal optique produit par une source (12) de signaux optiques comprenant: une fibre optique (14) recevant le signal optique produit par la source (12), une vanne optique (16) permettant de coupler un signal de commande sortant de la fibre optique (14), un diviseur (22) du signal de commande en une première portion d'une longueur d'onde dépendant de l'intensité I1 et en une deuxième longueur d'onde dépendant de l'intensité I2, et un circuit de commande (28) calculant le rapport R = I1/ I2, et transmettant un signal d'erreur à la source (12) si la dérive de la longueur d'onde de la source (12) entraîne une déviation du rapport R supérieure à une valeur de consigne prédéterminée.

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