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All-optical switching of infrared optical radiation using isotropic liquid crystal

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4 Author(s)
LoPresti, P.G. ; Dept. of Electr. Eng., Pennsylvania State Univ., University Park, PA, USA ; Zhou, P. ; Linquist, R.G. ; Khoo, I.C.

Experimental results of the transmission to total-internal reflection switching of a step-on CO2 laser beam by a dielectric-clad, isotropic liquid crystal film is presented. The use of the isotropic phase allows for polarization independence of the processes, while maintaining a moderate thermal nonlinearity. Dependence of switching speed on incident angle and energy density is evaluated. Experimental observations of the nonlinear switching effect with microsecond CO2 laser pulses are also presented

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Quantum Electronics, IEEE Journal of  (Volume:31 ,  Issue: 4 )