Nonlinear generation of higher-order combinational gratings during sequential recording in LiNbO_3

  1. de Miguel-Sanz, E. M. 1
  2. Limeres, J. 1
  3. Arizmendi, L. 1
  4. Carrascosa, M. 1
  1. 1 Universidad Autónoma de Madrid
    info

    Universidad Autónoma de Madrid

    Madrid, España

    ROR https://ror.org/01cby8j38

Revista:
Journal of the Optical Society of America B

ISSN: 0740-3224,  1520-8540

Año de publicación: 1999

Volumen: 16

Número: 10

Páginas: 1658

Tipo: Artículo

DOI: 10.1364/JOSAB.16.001658 GOOGLE SCHOLAR lock_openAcceso abierto editor

Otras publicaciones en: Journal of the Optical Society of America B

Resumen

The observation of diffraction spots from strong higher-order combinational gratings during sequential recording of two photorefractive holograms in a LiNbO3 crystal is reported. To the best of our knowledge, this is the first time that combinational photorefractive gratings of third and fourth order have been detected. The influence of the parameters of both intentionally recorded gratings on the amplitude of second-order combinational components (?1+?2 and ?1−?2) has been investigated. We have found that the strength of these gratings essentially increases with the amplitude of the first grating recorded and with the modulation of the second grating recorded. However, the combinational gratings behave differently from the second-harmonic gratings in some respects. The results can be qualitatively explained in terms of the nonlinearities of band transport equations.

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