OSA's Digital Library

Optics Letters

Optics Letters


  • Vol. 15, Iss. 13 — Jul. 1, 1990
  • pp: 743–745

Spatial amplification: an image-processing technique using the selective amplification of spatial frequencies

Tallis Y. Chang, John H. Hong, and Pochi Yeh  »View Author Affiliations

Optics Letters, Vol. 15, Issue 13, pp. 743-745 (1990)

View Full Text Article

Enhanced HTML    Acrobat PDF (486 KB)

Browse Journals / Lookup Meetings

Browse by Journal and Year


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools



A novel technique of processing optical images that we call spatial amplification is proposed and demonstrated. The basic idea is to amplify coherently a set of selected spatial frequency components of an image. Unlike in the usual spatial filtering techniques, in which the components are selectively blocked out at the Fourier plane of a coherent processor, spatial amplification does not discard any of the incident image information. The advantages of the proposed technique over spatial filtering include high energy efficiency and the possibility for cascading several stages. In the demonstrated experiments, the required amplification is provided by two-beam energy coupling in a photorefractive BaTiO3 crystal with a nonuniform pump beam.

© 1990 Optical Society of America

Original Manuscript: December 26, 1989
Manuscript Accepted: April 3, 1990
Published: July 1, 1990

Tallis Y. Chang, John H. Hong, and Pochi Yeh, "Spatial amplification: an image-processing technique using the selective amplification of spatial frequencies," Opt. Lett. 15, 743-745 (1990)

Sort:  Author  |  Year  |  Journal  |  Reset  


  1. J. W. Goodman, Introduction to Fourier Optics (McGraw-Hill, San Francisco, Calif., 1968).
  2. J. Tsujiuchi, in Progress in Optics, E. Wolf, ed. (North-Holland, Amsterdam, 1963), Vol. II, Chap. IV.
  3. V. L. Vinetskii, N. V. Kukhtarev, S. G. Odulov, M. S. Soskin, Sov. Phys. Usp. 22, 742 (1979). [CrossRef]
  4. Y. Fainman, E. Klancnik, S. H. Lee, Opt. Eng. 25, 228 (1986).
  5. P. Yeh, IEEE J. Quantum Electron. 25, 484 (1989). [CrossRef]
  6. A. E. T. Chiou, P. Yeh, Opt. Lett. 10, 621 (1985). [CrossRef] [PubMed]
  7. J. Feinberg, Opt. Lett. 5, 330 (1980). [CrossRef] [PubMed]
  8. B. Fischer, S. Weiss, S. Sternklar, Appl. Phys. Lett. 50, 483 (1987). [CrossRef]

Cited By

Alert me when this paper is cited

OSA is able to provide readers links to articles that cite this paper by participating in CrossRef's Cited-By Linking service. CrossRef includes content from more than 3000 publishers and societies. In addition to listing OSA journal articles that cite this paper, citing articles from other participating publishers will also be listed.


Fig. 1 Fig. 2 Fig. 3
Fig. 4 Fig. 5

« Previous Article  |  Next Article »

OSA is a member of CrossRef.

CrossCheck Deposited