Nanosecond fast electrically tunable fabry-perot filter

G - Physics – 02 – F

Patent

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Details

G02F 1/025 (2006.01) G02B 5/28 (2006.01) G02F 1/21 (2006.01)

Patent

CA 2129602

The present invention is directed at an electrically tunable filter for wavelength filtering of light. The filter comprises a substrate region, a waveguide region over the substrate, an upper region over the waveguide region, and current blocking regions adjacent to the waveguide region. The waveguide region comprises a semiconductor having a bandgap wavelength sufficiently different from the light for transparent transmission of the light. A waveguide rib layer may also be included in the waveguide region to channel the light through the filter. The current blocking regions narrow the waveguide region to increase the current density. The present invention is also directed at a method of manufacturing the filter described above.

La présente invention porte sur un filtre de longueur d'onde lumineuse électriquement accordable. Ce filtre comprend un substrat, une région de guidage de la lumière construite sur ce substrat, une région supérieure superposée à cette région de guidage et des régions de blocage du courant adjacentes à la région de guidage. Cette dernière comporte un semi-conducteur à longueur d'onde de bande interdite suffisamment différente de celle de la lumière pour permettre la transmission transparente de la lumière. Une couche périphérique peut également être incorporée à la région de guidage pour concentrer la lumière dans le filtre. Les régions de blocage du courant rétrécissent la région de guidage pour accroître la densité du courant. Une méthode de fabrication du filtre de l'invention est également divulguée.

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