Digitally controlled optical intensity modulator in integrated optics and digital-analog converter comprising such a modulator

摘要

the invention relates to a light intensity modulator, controlled by a "word of n bits, and a digital to analog converter opto electronics.;the modulator includes an interferometer with two arms (2, 3) in length which is created by electro-optic effect.the successive phase controlled respectively by control bits whose values are in the order the bits are 1. according to the successive powers of 2.the total phase shift obtained is directly related to the value of the analog control and intensity is modulated as a function of the new word.there is a digital to analog converter and a photodetector whose output voltage is a function of the analog value of the control.;the invention applies in particular to optical telecommunications.