Digital-holography refractive-index-profile measurement of phase gratings

Year: 2006

Authors: de Angelis M., De Nicola S., Finizio A., Pierattini G., Ferraro P., Pelli S., Righini G., Sebastiani S.

Autors Affiliation: Istituto di Cibernetica “E. Caianiello” del CNR, Via Campi Flegrei 34, 80078 Pozzuoli (NA), Italy;
CNR – Istituto Nazionale di Ottica Applicata, Via Campi Flegrei 34, 80078 Pozzuoli (NA), Italy;
Istituto di Fisica Applicata, CNR, Via Madonna del Piano 10, 50019 Sesto Firentino (FI), Italy

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.

Journal/Review: APPLIED PHYSICS LETTERS

Volume: 88 (11)      Pages from: 111114-1  to: 111114-3

More Information: This work was supported by the Ministero Italiano dell’Università e della Ricerca, progetto FIRB No. RBNE01KZ94 and progetto MIUR No. 77 DD N.1105/2002.
KeyWords: Lithium-niobate; Wave-guides; Crystals; Fabrication; Solitons; Filter
DOI: 10.1063/1.2186515

Citations: 31
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