Journal ArticleDOI
Amplification of high bandwidth signals through two‐wave mixing in photorefractive Bi12SiO20 crystals
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TLDR
In this article, a new nearly degenerate two-wave mixing interaction in photorefractive Bi12SiO20 crystals is reported, in which the signal beam is time modulated at high frequency.Abstract:
We report a new nearly degenerate two‐wave mixing interaction in photorefractive Bi12SiO20 crystals in which the signal beam is time modulated at high frequency. The beam coupling phenomena and the time integration properties of the crystal allow us to achieve a differential gain γdiff on the transmitted signal beam. The dependence of γdiff versus the duty cycle of the modulated signal is analyzed. Amplification and regeneration of periodic, or random sequences of information bits are experimentally demonstrated.read more
Citations
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Journal ArticleDOI
Interference-term real-time measurement for self-stabilized two-wave mixing in photorefractive crystals.
TL;DR: The real-time direct interference-term measurement for a two-wave-mixing experiment in photorefractive crystals comprises phase modulation of one of the interfering beams and synchronous detection of the first and second harmonics in the resulting output irradiance modulation.
Journal ArticleDOI
Two‐wave mixing with time‐modulated signal in Bi12SiO20 theory and application to homodyne wave‐front detection
TL;DR: In this article, the authors theoretically analyze a two-wave mixing interaction in photorefractive Bi12SiO20 crystals in which the amplitude of the signal beam is time modulated at high frequency.
Journal ArticleDOI
Photorefractive two-wave mixing in the presence of high-speed optical phase modulation
TL;DR: Equations that describe the steady-state dependence of the coherent-coupling properties of photorefractively induced refractive-index gratings on high-speed periodic biphase, sinusoidal, and triangular phase modulation impressed on one of the input optical beams are found and solved for both depleted and undepleted pump conditions.
Journal ArticleDOI
Coherent optical detection through two-wave mixing in photorefractive materials.
TL;DR: Photorefractively induced index-of-refraction phase gratings are shown to combine coherently the optical fields of a strong pump and a suitably amplitude- or phase-modulated signal beam in such a way that an apparent amplification of the modulating waveform appears as intensity modulation of the transmitted signal and pump beam intensities.
Journal ArticleDOI
Edge enhancement by use of moving gratings in a bismuth silicon oxide crystal and its application to optical correlation
TL;DR: The technique of moving gratings in a photorefractive crystal is applied to the edge enhancement of objects and edge-enhanced optical correlation and it is shown that the diffraction at high fringe modulations is enhanced by a factor of approximately 3.7.
References
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Journal ArticleDOI
Holographic storage in electrooptic crystals. i. steady state
TL;DR: In this paper, a non-linear theory of self-diffraction on the light induced grating of refractive index in electrooptic crystals is developed and the intensities of the diffracted beams, the diffraction efficiency, and the shape of the surfaces of equal index change are calculated analytically for saturation holograms.
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Two‐beam coupling in photorefractive Bi12SiO20 crystals with moving grating: Theory and experiments
TL;DR: In this paper, the second-order term in the Fourier development of Esc was interpreted by including the second order term in a second order Fourier term in Fourier analysis of BSO crystals.
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Optimal Properties Of Photorefractive Materials For Optical Data Processing
George C. Valley,Marvin B. Klein +1 more
TL;DR: In this paper, the authors used the charge transport model of photorefractivity to evaluate four figures of merit that can be used to characterize the performance of photoresilicon materials.
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Spatial frequency dependence of the energy transfer in two-wave mixing experiments with BSO crystals
TL;DR: In this paper, energy transfer between two beams interfering in an electrooptic Bi12SiO20 crystal is analyzed as a function of the spatial frequency of the recorded hologram.
Journal ArticleDOI
Wave Mixing In Photorefractive Bismuth Silicon Oxide Crystals And Its Applications
TL;DR: In this paper, the conditions of high gain in wave-mixing experiments with photorefractive bit 2Si020 crystals were reviewed and applications to image amplification, laser beam steering, amplified phase conjugation, and self-induced optical cavities were presented.