Patent ID: 6897993

Claim:
Electroabsorption modulator comprising: a layer sequence of at least five layers, the layer sequence comprising sequentially a first layer with excess charge carriers of a first charge carrier type, a second layer without excess charge carriers, a third layer with excess charge carriers of a second charge carrier type, a fourth layer without excess charge carriers, and a fifth layer with excess charge carriers of the first charge carrier type; at least one light absorption layer which is arranged between the first layer and the third layer and is set up to generate charge carriers upon irradiation of light of a specific wavelength; at least one storage layer which is arranged between the third layer and the fifth layer and is set up to store charge carriers; and at least one laterally extended insulating layer with a central opening incorporated in the first layer or the third layer or the fifth layer for limiting the current flow through the layer sequence and thus for defining an active modulator region in which laser light to be modulated overlaps with the active modulator region.