We demonstrate a dynamic all-optical image-intensity-inversion technique that uses self- and mutual-phase-modulation effects with a highly nonlinear nematic liquid-crystal film placed in an intermediate focal plane. This process requires submilliwatt optical power, responds in a few milliseconds, and can be realized over a very broad spectral range.
© 2000 Optical Society of America
(070.2580) Fourier optics and signal processing : Paraxial wave optics
(070.2590) Fourier optics and signal processing : ABCD transforms
(160.3710) Materials : Liquid crystals
(190.4400) Nonlinear optics : Nonlinear optics, materials
M. Y. Shih, A. Shishido, P. H. Chen, M. V. Wood, and I. C. Khoo, "All-optical image processing with a supranonlinear dye-doped liquid-crystal film," Opt. Lett. 25, 978-980 (2000)