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AssigneesFrance Telecom Etablissement Autonome de Droit Public, Centre National De La Recherche Scientifieque
InventorsMichel Allovon, Erwan Bigan, Jean-Christophe Harmand, Paul Voisin
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An integrated monolithic electrooptical component having an electrooptical modulator and a semiconductor laser on the same substrate. The modulator and laser are formed from a stack of semiconductor layers. The modulator includes one layer that is absorbent and the laser includes one layer that is active. Both absorbent and active layers are constituted by the same epitaxied structure of a highly coupled composition superlattice with alternation of semiconductor layers of different compositions. A forward voltage is applied to the laser layers that causes the active layer of the laser to emit a radiation which then traverses the absorbent layer of the modulator. A reverse voltage is applied to the modulator layers in order to modulate the absorption of the radiation traversing the modulator.
Integrated monolithic electrooptical component comprising on the same substrate an electrooptical modulator (M) formed from a stack of semiconductor layers, whereof one layer (10) is absorbent, a semiconductor laser (L) formed from a stack of semiconductor layers, whereof one (10) is active, means (Vd, 20, 22) for applying to the stack of laser layers a forward voltage crating an electric field perpendicular to the plane of the layers, the laser then emitting by its active layer (10) a radiation (26) traversing the absorbent layer of the modulator in the plane of said layer, means (Vi, 20, 22) for applying to the stack of layers of the modulator (M) a reverse voltage creating an electric field perpendicular to the plane of the layers to modulate the absorption of the radiation traversing the modulator, characterized in that the active layer of the laser (L) and the absorbent layer of the modulator (M) are both constituted by the same epitaxied structure of the highly coupled composition superlattice type (10) with alternation of the semiconductor layers of different compositions.
Dependencies are inferred from the claim text.