Multi-stripe array grating integrated cavity laser

H - Electricity – 01 – S

Patent

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H01S 3/10 (2006.01) G02B 6/12 (2006.01) H01S 5/40 (2006.01) H01S 3/08 (2006.01) H01S 5/026 (2006.01) H01S 5/14 (2006.01)

Patent

CA 2143944

An integrated, multi-wavelength laser having formed on a substrate (12) a plurality of active, individually selectable waveguides (14), a passive output waveguide (16), and a diffraction grating (18) formed in a Rowland-circle spectrometer geometry. The frequency of the lasing light is determined by the geometrical relationship of the selected active waveguide, the diffraction grating, and the output waveguide. The active waveguides are positioned such that lasing light cannot diffract between two active waveguides. Little crosstalk occurs because no carrier depletion occurs in the output waveguide.

Un laser intégré à longueurs d'onde multiples comporte un substrat (12) sur lequel sont formés une pluralité de guides d'ondes (14) actifs sélectionnables individuellement, un guide d'ondes passif (16), et un réseau de diffraction (18) formé selon une configuration géométrique spectrométrique en cercle de Rowland. La fréquence de la lumière active est déterminée par la relation géométrique du guide d'ondes actif sélectionné, du réseau de diffraction, et du guide d'ondes de sortie. Les guides d'ondes actifs sont positionnés de telle manière qu'il ne peut y avoir de diffraction de la lumière active entre deux guides d'ondes actifs. La diaphonie est faible du fait qu'il ne se produit pas d'appauvrissement de porteurs de charge dans le guide d'ondes de sortie.

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