Light intensity modulator with extended linear modulation range

Details Light intensity modulator with extended linear modulation range Light intensity modulator with extended linear modulation range

G - Physics

02

F

345/56

G02F 1/05 (2006.01) G02F 1/225 (2006.01) G02F 1/01 (2006.01)

Patent

CA 1142251

ABSTRACT OF THE DISCLOSURE The invention relates to a light intensity modulator, in integrated optics and an integrated optical circuit comprising such a modulator. The modulator comprises a two-arm interferometer in which there is created by electro-optical effect, a phase shift controlled by a modula- ting voltage between the light waves propagated in the two arms. It is characterized by a feedback loop comprising a light separator placed on the output guide of the interferometer, and a photodiode collecting the fraction of output intensity from the separator and supplying an electric voltage which is superimposed in the interferometer on the modulating vol- tage. Thus linearization of the output intensity-modulating voltage response curve is obtained.

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