Holographic imaging with multimode, large free spectral range lasers in photorefractive sillenite crystals

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Holographic imaging with multimode, large free spectral range lasers in photorefractive sillenite crystals

E. A. Barbosa Laboratório de Óptica Aplicada, Faculdade de Tecnologia de São Paulo, CEETEPS UNESP Pça Cel Fernando Prestes, 30, São Paulo – SP, Brazil, CEP 01124 060 [email protected] Abstract The holographic imaging of rigid objects with diode lasers emitting in many wavelengths in a sillenite Bi12TiO20 photorefractive crystal is both theoretically and experimentally investigated. It is show...

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Microscopic Interferometry by Reflection Holography with Photorefractive Sillenite Crystals

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Optical measurements of charge-carrier mobilities in photorefractive sillenite crystals

Photorefractive crystals exhibit large optical nonlinearities1 and have great potential in optical data processing.2 The extrinsic photorefractive effect in these electro-optic and photoconductive materials is rather well understood. The band-transport model' has been successfully employed to describe photorefraction in crystals such as the sillenite compounds, Bi12SiO2 0 and Bi12GeO 2 0 (BGO)....

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Anisotropic diffraction of light by volume holographic grating in birefringent photorefractive crystals with extended wavelength range.

The properties of anisotropic diffraction of light by volume holographic grating in birefringent photorefractive crystals are discussed. This diffraction takes place when the refractive index for diffracted light is different from the refractive index for incident light. It is found that in some special geometry of wavevector diagram the diffraction becomes less sensitive to the wavelength mism...

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Photorefractive effect generated in sillenite crystals by picosecond pulses and comparison with the quasi-continuous regime

Photorefractive gratings are generated in a BSO crystal by the interference of two 25-psec pulses at 532 nm. The grating is analyzed by diffraction of a third pulse or a weak cw argon laser, which permits a continuous monitoring of its evolution from picoseconds to milliseconds. The grating builds up in two steps; their relative contributions vary strongly with fluence. This behavior is explain...

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ژورنال

عنوان ژورنال: Applied Physics B

سال: 2005

ISSN: 0946-2171,1432-0649

DOI: 10.1007/s00340-004-1723-z