Accession Number : ADA286605


Title :   Optical Power Limiting Liquid Crystal Composites


Descriptive Note : Final rept. Jun 1988-Jun 1993


Corporate Author : KENT STATE UNIV OH LIQUID CRYSTAL INST


Personal Author(s) : Lee, Michael A ; Palffy-Muhoray, P ; West, J W ; Chien, L C ; Doane, J W


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a286605.pdf


Report Date : 10 Nov 1994


Pagination or Media Count : 136


Abstract : This final report covers the experimental and theoretical investigations of optical power limiting in liquid crystal systems. Both pure and composite systems were investigated. Evaluation of a variety of liquid crystal materials for optical power limiting applications is reported. Under this project, optical power limiting of several pure materials was demonstrated in the nanosecond regime, with the cyanobiphenyls being found most effective for passive OPL applications. For CW lasers, polymer dispersed liquid crystals in a polymer matrix were shown to be effective optical power limiters when used in an active configuration. Extensive research on the mechanisms causing optical nonlinear response in liquid crystals is reported. Additional work on a separate subproject to evaluate and develop the shuttering capability of polymer dispersed liquid crystals in the IR is reported. Work on a variety of polymer/liquid crystal materials is reported. Successful shuttering of IR radiation was shown.


Descriptors :   *OPTICAL PROPERTIES , *COMPOSITE MATERIALS , *LIQUID CRYSTALS , POLYMERS , NONLINEAR OPTICS , ORGANIC COMPOUNDS , POWER , INFRARED RADIATION , CONTINUOUS WAVE LASERS , BIPHENYL


Subject Categories : Organic Chemistry
      Laminates and Composite Materials
      Crystallography
      Optics


Distribution Statement : APPROVED FOR PUBLIC RELEASE