Selex Sistemi Integrati S.p.a.

Selex Es S.p.a.

Maurizio Giardina

Fabio Antonio Bovino

Concita Sibilia

Maria Cristina Larciprete

Roberto Cingolani

Marco Centini

Adriana Passaseo

Alessandro Belardini

Mario Bertolotti

Vittorianna Tasco

Described herein is a method for determining second-order nonlinear optical coefficients of a material. The method envisages the steps of providing a specimen made at least in part of the material, causing a first optical signal and a second optical signal having, respectively, a first pulsation and a second pulsation, and a first polarization state and a second polarization state, to impinge upon the specimen in such a way that the specimen generates a second-harmonic optical signal having a third pulsation equal to the sum of the first and second pulsations, and a third polarization state that is a function of the first and second polarization states. The method further envisages the step of determining a plurality of measurements of power corresponding to the second-harmonic optical signal, and the step of determining the second-order nonlinear optical coefficients on the basis of the plurality of measurements of power. In addition, the method envisages performing a plurality of measurements of power of the second-harmonic optical signal as the first polarization state and the second polarization state vary.

Method and system for determining second-order nonlinear optical coefficients

Optical logic gate having a second-harmonic generator element that receives a first and a second optical input signal respectively having a first and a second angular frequency and respectively having a first and a second polarization, and which provides a second-harmonic optical signal having a third angular frequency and a third polarization. The third angular frequency is equal to the sum of the first and the second angular frequency. The third polarization is a function of the first and the second polarization. The second-harmonic generator element includes a second-harmonic generator layer in a material having a non-null second-order optical tensor.

Optical logic gate

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Genoa, Italy

Maurizio Giardina