Infrared and visible laser-induced thermal and density optical      nonlinearities in nematic and isotropic liquid crystals

Robert G. Lindquist; Peter G. LoPresti; Iam-Choon Khoo

doi:10.1117/12.138057

18 August 1992 Infrared and visible laser-induced thermal and density optical nonlinearities in nematic and isotropic liquid crystals

Robert G. Lindquist, Peter G. LoPresti, Iam-Choon Khoo

Author Affiliations +

Proceedings Volume 1692, Nonlinear and Electro-Optic Materials for Optical Switching; (1992) https://doi.org/10.1117/12.138057
Event: Aerospace Sensing, 1992, Orlando, FL, United States

Abstract

Using a Q-switched CO₂ laser pulse induced dynamic grating technique, the basic mechanisms for the optical nonlinearities of nematic and isotropic liquid crystals in the infrared (10.6 micrometers ) region are reexamined. The principle mechanisms are the density and temperature effects, which are characterized by relaxation times in the nano- and micro-second time scales, respectively. Optical self-limiting effects and optical switching using isotropic liquid crystals are also demonstrated for visible nanosecond (Q-switch Nd:YAG at 0.53 micrometers ) and for infrared microsecond laser pulses, respectively.

Citation Download Citation

Robert G. Lindquist, Peter G. LoPresti, and Iam-Choon Khoo "Infrared and visible laser-induced thermal and density optical nonlinearities in nematic and isotropic liquid crystals", Proc. SPIE 1692, Nonlinear and Electro-Optic Materials for Optical Switching, (18 August 1992); https://doi.org/10.1117/12.138057

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