INSTABILITY OF SPATIAL GRATINGS INDUCED BY AC FIELDS IN PHOTOREFRACTIVE CRYSTALS

Autor(en): STURMAN, BI
MANN, M
RINGHOFER, KH
Stichwörter: ELECTROOPTIC CRYSTALS; HOLOGRAPHIC STORAGE; Optics; SUBHARMONICS
Erscheinungsdatum: 1992
Herausgeber: OPTICAL SOC AMER
Journal: OPTICS LETTERS
Volumen: 17
Ausgabe: 22
Startseite: 1620
Seitenende: 1622
Zusammenfassung: 
It is shown that spatial gratings in photorefractive crystals, induced by the standing interference pattern of two coherent waves and an external alternating electric field, may be unstable against the excitation of weakly damped eigenmodes. The dependence of the exponential rate of growth of the instability on experimental parameters and crystal characteristics is investigated. The instability influences the amplification of the photorefractive sensitivity by an ac field. A comparison is made between theoretical results and experimental data.
ISSN: 01469592
DOI: 10.1364/OL.17.001620

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