Hexagon formation in photorefractive crystals as mirrorless coherent oscillation

Y. Uesu*, A. Ueno, M. Kobayashi, S. Odoulov

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


The spontaneous appearance of hexagon patterns in photorefractive crystals is treated as mirrorless coherent four-wave mixing oscillation. It is shown experimentally that the system has a well-defined coupling-strength threshold and behaves as other coherent optical oscillators near the threshold. A simple relation for the angle of the hexagon sideband as a function of the distance between the end mirror and the sample is derived and verified experimentally.

Original languageEnglish
Pages (from-to)2065-2069
Number of pages5
JournalJournal of the Optical Society of America B: Optical Physics
Issue number7
Publication statusPublished - 1998 Jul

ASJC Scopus subject areas

  • Statistical and Nonlinear Physics
  • Atomic and Molecular Physics, and Optics


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