Polyurethane-Based NLO Polymers

The macroscopic second-order susceptibility x of these materials is determined by measuring the SHG signal intensity. By optimizing the poling process. 

Polyurethanes Glass transition temperature (Tp (°C) UV(, 3, (nm) ) Refractive index ( ) (TM) Reference 

Cerenkov-type phase-matched blue SHG in such a produced waveguide is typical (Fig. 4b). The conversion efficiency of this waveguide exhibits at least one-order of magnitude higher than those of the nonphase-matched samples, even where conversion efficiency is not fully optimized. This activity typically lasts for more than 

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