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Optica Publishing Group
  • Quantum Electronics and Laser Science Conference
  • OSA Technical Digest (Optica Publishing Group, 1992),
  • paper JFC5

Spatial solitons in photorefractive media

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Abstract

We present a new type of spatial soliton, generated by the photorefractive (PR) effect of the medium. The shape of the soliton modulates the refractive index via the PR effect, which results in an exact compensation for the effects of diffraction, and causes the light beam to propagate the unvarying profile. This index modulation is represented in the formalism as a distribution of index gratings, each one of them induced by the interference between two spatial (frequency) plane wave components of the light beam. Since the efficiency of this effect is independent of absolute light intensity, these new solitons can be generated even at very moderate light intensities. Moreover, a given soliton waveform can propagate unchanged in the medium, at very high or very low light intensities (and at all levels in between).

© 1992 Optical Society of America

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