Absolute Measurement of Second-Order Nonlinear Optical Coefficient of LiNbO3 by Parametric Processes

Abstract

We have redetermined the absolute values of the nonlinear optical coefflcient, d31' of LiNb03 by parametric fluorescence and, for the first time, by difference frequency generation measurements to resolve the considerable discrepancy that existed between the values determined by second-harmonic generation (SHG) and parametric fluorescence. We obtain d31 =4.8~0.5 and 4.3~0.5 pm/V at the pump wavelengths of 488 and 532 nm, respectively, in reasonable agreement with the SHG data. It appears that the previous parametric fluorescence value, d31=5.8 pm/V, was overestimated.Key words : absolute measurement, second-order nonlinear difference frequency generation optical coefiicient, parametric fluorescence,

Synthesis and characterization of novel nonlinear optical polyimide

“…A variety of experimental techniques have been used to obtain both absolute and relative values of the second-order susceptibility. The absolute methods include phase-matched second-harmonic generation [113], parametric fluorescence [114][115], and Raman scattering [116]. The second-harmonic powder test, the wedge technique [117] and the maker-fringe method [118] are relative methods.…”