Optical limiting with liquid-crystal materials

Aharon Hochbaum; James L. Fergason; Jesse D. Buck

doi:10.1117/12.138052

18 August 1992 Optical limiting with liquid-crystal materials

Aharon Hochbaum, James L. Fergason, Jesse D. Buck

Proceedings Volume 1692, Nonlinear and Electro-Optic Materials for Optical Switching; (1992) https://doi.org/10.1117/12.138052
Event: Aerospace Sensing, 1992, Orlando, FL, United States

Abstract

We report the characteristics of a strong 3^rd order negative nonlinear effect in the nematic and smectic A liquid crystal phases as well as in the isotropic phase. Limiting is achieved as a result of a strong light scattering effect with some contribution from nonlinear absorption. We used an optical limiting setup to measure the limiting threshold and clamped output parameters. We present data regarding the dependence of these parameters on polarization direction, liquid crystalline order and alignment, depth of focus into the liquid crystal layer, cell thickness and temperature. We also discuss the temporal behavior of the limited pulses.

Citation Download Citation

Aharon Hochbaum, James L. Fergason, and Jesse D. Buck "Optical limiting with liquid-crystal materials", Proc. SPIE 1692, Nonlinear and Electro-Optic Materials for Optical Switching, (18 August 1992); https://doi.org/10.1117/12.138052

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