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Papers by Giovanni Albanese
Optics letters, 1988
A new architecture for an optical matrix-matrix multiplier is presented. It is based on the beam-... more A new architecture for an optical matrix-matrix multiplier is presented. It is based on the beam-modulation and Its parallel structure makes it very fast. Some physical limitations are discussed.
JOSA B, 1987
INTRODUCTION The photorefractive effect has been investigated extensive-lyl-7 through two-wave an... more INTRODUCTION The photorefractive effect has been investigated extensive-lyl-7 through two-wave and four-wave mixing experiments in BaTiO 3 , LiNbO 3 , BSO, and many other materials. Re-cently GaAs has aroused interest because of the possibility of achieving ...
Optics letters, 1986
We report experimental results on the photorefractive properties of chrome-doped GaAs. Grating-fo... more We report experimental results on the photorefractive properties of chrome-doped GaAs. Grating-formation time and the behavior of the two-beam-coupling gain as a function of intensity, grating spacing, and applied voltage have been investigated. Gains as high as 0.9 cm(-1) have been observed with 6-kV voltage applied.
Optics letters, 1987
Enhanced two-beam mixing amplification at a wavelength of 1.06 mum obtained by using sinusoidal e... more Enhanced two-beam mixing amplification at a wavelength of 1.06 mum obtained by using sinusoidal electrical fields at 7.7 MHz is reported. The peak measured gains are comparable with dc field enhanced gain but with smaller rms fields. At grating wavelengths >3 mum the ac enhanced gain is considerably higher than the dc enhanced gain. Uniform alternating electric fields are much easier to establish inside the material and result in a much more stable output than dc fields.
Optics communications, 1987
Optics letters, 1988
A new architecture for an optical matrix-matrix multiplier is presented. It is based on the beam-... more A new architecture for an optical matrix-matrix multiplier is presented. It is based on the beam-modulation and Its parallel structure makes it very fast. Some physical limitations are discussed.
JOSA B, 1987
INTRODUCTION The photorefractive effect has been investigated extensive-lyl-7 through two-wave an... more INTRODUCTION The photorefractive effect has been investigated extensive-lyl-7 through two-wave and four-wave mixing experiments in BaTiO 3 , LiNbO 3 , BSO, and many other materials. Re-cently GaAs has aroused interest because of the possibility of achieving ...
Optics letters, 1986
We report experimental results on the photorefractive properties of chrome-doped GaAs. Grating-fo... more We report experimental results on the photorefractive properties of chrome-doped GaAs. Grating-formation time and the behavior of the two-beam-coupling gain as a function of intensity, grating spacing, and applied voltage have been investigated. Gains as high as 0.9 cm(-1) have been observed with 6-kV voltage applied.
Optics letters, 1987
Enhanced two-beam mixing amplification at a wavelength of 1.06 mum obtained by using sinusoidal e... more Enhanced two-beam mixing amplification at a wavelength of 1.06 mum obtained by using sinusoidal electrical fields at 7.7 MHz is reported. The peak measured gains are comparable with dc field enhanced gain but with smaller rms fields. At grating wavelengths >3 mum the ac enhanced gain is considerably higher than the dc enhanced gain. Uniform alternating electric fields are much easier to establish inside the material and result in a much more stable output than dc fields.
Optics communications, 1987