Two-dimensional mapping of electro-optic phase retardation in lithium niobate crystals by digital holography

We demonstrate accurate two-dimensional mapping of the phase retardation induced by the electro-optic effect in lithium niobate crystals. Off-axis digital holography is used to investigate congruent z-cut crystals. The spatially resolved optical path difference is interferometrically measured while...

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Bibliographic Details
Published in:Optics letters 2005-07, Vol.30 (13), p.1671-1673
Main Authors: DE ANGELIS, M, DE NICOLA, S, FINIZIO, A, PIERATTINI, G, FERRARO, P, GRILLI, S, PATURZO, M, SANSONE, L, ALFIERI, D, DE NATALE, P
Format: Article
Language:English
Subjects:
Computer-generated holograms
Engineering physics
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Holography
Nonlinear optical crystals
Optical materials
Optical physics
Optics
Optisk fysik
Physics
TECHNOLOGY
TEKNIKVETENSKAP
Teknisk fysik
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Summary:We demonstrate accurate two-dimensional mapping of the phase retardation induced by the electro-optic effect in lithium niobate crystals. Off-axis digital holography is used to investigate congruent z-cut crystals. The spatially resolved optical path difference is interferometrically measured while a linearly rising voltage ramp is applied to the crystal. This procedure provides information on the uniformity of crystals' electro-optic properties and offers the ability to detect the presence of defects that is of fundamental importance for reliable processing of photonic devices.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.30.001671