Optical poling set-up

Unit: Faculty of Physics

Keywords: Optical poling, Nd:YAG, laser, kinetics

Responsible person: Dr. Rolandas Tomašiūnas, tel.+37060034126,

The optical poling set-up provides creation of second order non-linear optical susceptibility gratings in a volume by mixing coherent first and second Nd:YAG laser harmonics.

Using the set-up writing and relaxation kinetics of these gratings are registered. Main processes and characteristic parameters (cis→trans thermoisomerization rate, molecular orientational diffusion coefficient) can be extracted via modeling the optical poling kinetics. The optical poling can be investigated in the temperature interval 10-300 K, therefore, activation energy of the parameters can be defined.
It is used for measuring optical poling with a characteristic time constant not shorter than 10 s. Sample quantity is not limited.

Application. Investigation of molecule optical poling.