Photorefractive saturable Kerr-type nonlinearity in photovoltaic crystals

Autor(en): Bian, S
Frejlich, J
Ringhofer, KH
Stichwörter: BRIGHT; DARK; ELECTROOPTIC CRYSTALS; FIELD; HOLOGRAPHIC STORAGE; MEDIA; OPTICAL BEAM; Physics; Physics, Multidisciplinary; SCREENING SOLITONS; SPATIAL SOLITONS; STEADY-STATE
Erscheinungsdatum: 1997
Herausgeber: AMER PHYSICAL SOC
Journal: PHYSICAL REVIEW LETTERS
Volumen: 78
Ausgabe: 21
Startseite: 4035
Seitenende: 4038
Zusammenfassung: 
We deduce the equation describing the refractive index perturbation in photovoltaic photorefractive crystals produced by the incidence of a focused laser beam and an incoherent uniform illumination. Under short-circuit conditions the equation shows a saturable Kerr-type nonlinearity that can be controlled by the intensity of the uniform background illumination. Z-scan experiments in an iron doped lithium niobate crystal are carried out using a 532 nm wavelength laser line to evaluate its self-lensing properties and to measure its photovoltaic field.
ISSN: 00319007
DOI: 10.1103/PhysRevLett.78.4035

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