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Optica Publishing Group
  • International Quantum Electronics Conference
  • 1996 OSA Technical Digest Series (Optica Publishing Group, 1996),
  • paper WL61

Self-induced trapping of optical beams in photorefractive semiconductors

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Abstract

Spatial solitons in photorefractive materials have been a subject of recent interest. [1] When compared to Kerr spatial solitons, their most distinctive features is that they are observed at low light intensities and trapping occurs in both transverse dimensions. Photorefractive spatial solitons have been observed in the tungsten bronze ferroelectric oxides [2] and in the non-ferroelectric sillenite oxides. [3] Recently, we reported self-induced trapping in one dimension in the semi-insulating compound semiconductor lnP:Fe. In particular, we observed that for milliwat laser beams diffraction was exactly balanced by the photorefractively induced index change. Our observation was made under conditions similar to those used for the observation of photorefractive solitons in strontium barium niobate (SBN). [5] In this paper we report on the observation of self-induced focusing effects in both one and two-dimensions in InP:Fe.

© 1996 Optical Society of America

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