Optical Phase Conjugation with Orientation and Thermal Gratings

Optical Phase Conjugation with Orientation and Thermal Gratings 

On the other hand, in the ntid-infrared regime (1-5 pm) nematics are less absorptive typically the absorption contrast is about 10 cm or less, and thus longer interaction lengths are possible. Since there are few competitive materials (in terms of the large nonlinearity and low laser power threshold requirement) in these spectral regimes, nematic liquid crystals will be the natural choice for phase conjugation related applications. 

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