A phase grating is produced in an iron-doped lithium niobate photorefractive crystal by two-beam holographic configuration. Digital holography is used to investigate the two-dimensional profile of index of refraction produced by the photorefractive process. The proposed technique gives a direct and quantitative two-dimensional profile of index of refraction in photorefractive structures, can monitor defects and can be used for in situ visualization during the photorefractive process.
Digital-holography refractive-index-profile measurement of phase gratings
de Angelis M;De Nicola S;Finizio A;Pierattini G;Ferraro P;Pelli S;Righini G;
2006
Abstract
A phase grating is produced in an iron-doped lithium niobate photorefractive crystal by two-beam holographic configuration. Digital holography is used to investigate the two-dimensional profile of index of refraction produced by the photorefractive process. The proposed technique gives a direct and quantitative two-dimensional profile of index of refraction in photorefractive structures, can monitor defects and can be used for in situ visualization during the photorefractive process.File in questo prodotto:
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