Share Email Print
cover

Proceedings Paper

Direction-dependent filtering using self-pumped phase conjugation
Author(s): Yim-Kul Lee; Hyung-Wook Jeon; Jung-Young Son; Myong-Wook Kim; Jae-Chul Cho
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper Abstract

A new direction-dependent spatial filtering is presented with a self-pumped BaTiO3 crystal as an optical phase conjugator in two different geometries. In the first geometry, an input object (e.g., the letter K) is focused into the crystal by a Fourier transforming lens. As the crystal was located at the back focal plane of the lens, the vertical edges of the object orthogonal to the plane of incidence became most significantly enhanced. Other deviated from the orthogonal direction gradually fell off in brightness. Much better performance in speed and system control could be achieved with the second geometry where a reference beam along with a spatial filter forms gratings inside the crystal and the object beam focuses toward the gratings. The direction-dependency was then achieved with a long-narrow spatial filter oriented horizontally in the reference beam. The result is a high speed direction-dependent edge enhancement. The effect of the filter size on the performance is also discussed.

Paper Details

Date Published: 9 November 1993
PDF: 8 pages
Proc. SPIE 2026, Photonics for Processors, Neural Networks, and Memories, (9 November 1993); doi: 10.1117/12.163618
Show Author Affiliations
Yim-Kul Lee, Korea Institute of Science and Technology (South Korea)
Hyung-Wook Jeon, Korea Institute of Science and Technology (South Korea)
Jung-Young Son, Korea Institute of Science and Technology (South Korea)
Myong-Wook Kim, Korea Institute of Science and Technology (South Korea)
Jae-Chul Cho, Korea Institute of Science and Technology (South Korea)


Published in SPIE Proceedings Vol. 2026:
Photonics for Processors, Neural Networks, and Memories
Stephen T. Kowel; William J. Miceli; Joseph L. Horner; Bahram Javidi; Stephen T. Kowel; William J. Miceli, Editor(s)

© SPIE. Terms of Use
Back to Top