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1. (WO2010113190) METHOD AND SYSTEM FOR DETERMINING SECOND-ORDER NONLINEAR OPTICAL COEFFICIENTS

Pub. No.:    WO/2010/113190    International Application No.:    PCT/IT2009/000131
Publication Date: Fri Oct 08 01:59:59 CEST 2010 International Filing Date: Wed Apr 01 01:59:59 CEST 2009
IPC: G02F 1/35
G01N 21/63
Applicants: SELEX SISTEMI INTEGRATI S.p.A.
BOVINO, Fabio Antonio
LARCIPRETE, Maria Cristina
GIARDINA, Maurizio
SIBILIA, Concita
Inventors: BOVINO, Fabio Antonio
LARCIPRETE, Maria Cristina
GIARDINA, Maurizio
SIBILIA, Concita
Title: METHOD AND SYSTEM FOR DETERMINING SECOND-ORDER NONLINEAR OPTICAL COEFFICIENTS
Abstract:
Described herein is a method for determining second- order nonlinear optical coefficients of a material. The method envisages the steps of providing a specimen (1;35) made at least in part of the material, causing a first optical signal (Si1) and a second optical signal (Si2) 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 (su3) 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.