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Proceedings Paper

Orientational optical nonlinearity of nematic liquid crystals for image conversion and optical limiting
Author(s): Iam-Choon Khoo; Min-Yi Shih; Michael V. Wood; Pao H. Chen
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Paper 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.

Paper Details

Date Published: 14 October 1999
PDF: 9 pages
Proc. SPIE 3800, Liquid Crystals III, (14 October 1999); doi: 10.1117/12.365810
Show Author Affiliations
Iam-Choon Khoo, The Pennsylvania State Univ. (United States)
Min-Yi Shih, The Pennsylvania State Univ. (United States)
Michael V. Wood, The Pennsylvania State Univ. (United States)
Pao H. Chen, The Pennsylvania State Univ. (United States)


Published in SPIE Proceedings Vol. 3800:
Liquid Crystals III
Iam-Choon Khoo, Editor(s)

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