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Proceedings Paper

Image Transmission And Self-Oscillation In An Active Phase-Conjugated Ring Resonator Using BaTiO[sub]3[/sub]
Author(s): T Tschudi; H Klumb; T. Kobialka; A Herden; F. Laeri; T H Darmstadt; J. Albers
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Paper Abstract

Applications of active feedback in optics have been discussed by several authors. For example cohe-rent optical systems have been proposed for analog optical computing /1/. Recently progress has been made in the field of holographic associative memories /2/ and several coherent optical feedback configurations have been realized /3/. So far in those experiments the apertures were limited in diameter as well as angle and also the achieved amplification factors were not suitable enough for applications. In our work we studied a feedback system with ring structure together with photorefractive amplifiers. An increase of the space-bandwidth product of former systems was realized with the use of the aberration compensating properties of the phase conjugating element. Moreover this phase conjugating element allowed a gain in the feedback loop of > 50. We studied further possibilities of incorporating even higher gain in the loop (up to several thousands). Both amplifier types were realized with photorefractive crystals of BaTiO3 /4,5/. Injection of a spatially modulated beam into this active feedback system causes image bearing os-cillation. Experimental results concerning image transmission and self oscillation are reported.

Paper Details

Date Published: 1 January 1987
PDF: 2 pages
Proc. SPIE 0813, Optics and the Information Age, (1 January 1987); doi: 10.1117/12.967158
Show Author Affiliations
T Tschudi, Institute of Applied Physics (Germany)
H Klumb, Institute of Applied Physics (Germany)
T. Kobialka, Institute of Applied Physics (Germany)
A Herden, Institute of Applied Physics (Germany)
F. Laeri, Institute of Applied Physics (Germany)
T H Darmstadt, Hochschulstrabe 2 (Germany)
J. Albers, Universitat des Saarlandes (Germany)


Published in SPIE Proceedings Vol. 0813:
Optics and the Information Age

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