14 October 1999 Orientational optical nonlinearity of nematic liquid crystals for image conversion and optical limiting
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Abstract
We present a review of the basic mechanisms for laser induced refractive index changes associated with director axis reorientation in nematic liquid crystals. In methyl-red doped nematic liquid crystal, an index change coefficient of more than 10 cm2/GW has been obtained, allowing us to perform image conversion and optical limiting processes at very low optical intensities. In particular, we demonstrated a very large dynamic range twisted nematic liquid crystal limiter that will protect sensor from cw or long-pulse laser jamming.
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Iam-Choon Khoo, Min-Yi Shih, Michael V. Wood, Pao H. Chen, "Orientational optical nonlinearity of nematic liquid crystals for image conversion and optical limiting", Proc. SPIE 3800, Liquid Crystals III, (14 October 1999); doi: 10.1117/12.365810; https://doi.org/10.1117/12.365810
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