Orientational optical nonlinearity of nematic liquid crystals for image conversion and optical limiting

Iam-Choon Khoo; Min-Yi Shih; Michael V. Wood; Pao H. Chen

doi:10.1117/12.365810

14 October 1999 Orientational optical nonlinearity of nematic liquid crystals for image conversion and optical limiting

Iam-Choon Khoo, Min-Yi Shih, Michael V. Wood, Pao H. Chen

Proceedings Volume 3800, Liquid Crystals III; (1999) https://doi.org/10.1117/12.365810
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1999, Denver, CO, United States

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.

Citation Download Citation

Iam-Choon Khoo, Min-Yi Shih, Michael V. Wood, and 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); https://doi.org/10.1117/12.365810

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