Abstract

Isolated spots, which are spatially solitary states, are triggered at the desired positions by a control light in a nonlinear optical system with two-dimensional feedback. They exist because of the balance between isotropic transverse couplings of diffraction and an automatic regulation of feedback-loop gain owing to a simple low-cut spatial frequency filter. Self-scanning of isolated spots is caused by slight unisotropic transverse couplings without a special scanning mechanism. It provides a novel method for image display and image delay.

© 2000 Optical Society of America

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