Fiber bragg grating dispersion compensator

H - Electricity – 04 – B

Patent

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H04B 10/18 (2006.01) G02B 5/26 (2006.01) G02B 6/34 (2006.01)

Patent

CA 2400861

A dispersion compensator has a linearly chirped fiber Bragg grating mounted at two ends of an elongated, channel-shaped heat distributor. The distributor has two thermo- electric coolers at two ends, a heating strip for uniform heating of the distributor, a temperature sensor mounted on the distributor in the middle of the grating region, and longitudinally variable heating means attached to the distributor and extending along its length for effecting a longitudinally varying heating of the grating region. The provision of the heating strip helps maintain linearity of the thermal gradient of the distributor while the longitudinally variable heaters facilitate relatively fast dithering of the temperature of the grating region.

L'invention concerne un compensateur de dispersion pour fibres optiques utilisant un réseau de Bragg à compression linéaire d'impulsions monté aux deux extrémités d'un distributeur de chaleur allongé en forme de canal. Le distributeur comporte deux refroidisseurs thermoélectriques aux deux extrémités, une bande chauffante pour un chauffage uniforme du distributeur, un capteur de température installé sur le distributeur dans le milieu de la région du réseau et un dispositif de chauffage variable longitudinalement fixé au distributeur et s'étendant sur sa longueur pour fournir une chaleur variant longitudinalement de la région du réseau. La bande chauffante aide à maintenir la linéarité du gradient thermique du distributeur pendant que les dispositifs de chauffage variables facilitent une oscillation relativement rapide de la température de la région du réseau.

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