Journal ArticleDOI
Photorefractive two-wave mixing in the presence of high-speed optical phase modulation
TLDR
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.Abstract:
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. The period of the phase modulation wave form was kept short compared with the grating-formation time but did not cause significant spectral broadening. The results obtained were verified with data obtained from measurements of two-wave mixing in the photorefractive material, InP:Fe.read more
Citations
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Journal ArticleDOI
Transmission of time modulated optical signals through an absorbing photorefractive crystal
TL;DR: In this article, the authors solved the problem of the transmission of time modulated signals in a two-beam coupling photorefractive set-up using an absorbing material and obtained an analytical expression that describes this phenomenon in absence of pump beam depletion due to beam coupling.
Journal ArticleDOI
Novel theoretical aspects on photorefractive ultrasonic detection and implementation of a sensor with an optimum sensitivity
TL;DR: In this article, theoretical and experimental results on homodyne detection using near-infrared laser sources, at 1.06, 1.32, and 1.55 μm wavelengths, were presented.
Journal ArticleDOI
Eye safe large field of view homodyne detection using a photorefractive CdTe:V crystal
TL;DR: In this article, a self-adapting homodyne detection system using a photorefractive CdTe:V crystal as the element that combines local oscillator and signal beams is presented.
Patent
Sensitive and fast response optical detection of transient motion from a scattering surface by two-wave mixing
TL;DR: In this article, a method and apparatus for optically detecting transient motion from the surface of a workpiece is described, where a laser beam is reflected from it and then interferes with a pump beam removed from the laser source, inside a real-time holographic material, so as to form a grating diffracting the pump beam into a reference beam, which interfers at the output of the real-to-holographic material with the received light beam, producing a signal representative of the surface transient motion.
Journal ArticleDOI
Photorefractive materials: specifications relevant to applications
TL;DR: It is shown that generally quoted figures of merit of photorefractive materials do not allow us to select a `best material', and accurately defining the materials' properties relevant to several applications taken in various domains such as optical storage, real time interferometry and pattern recognition.
References
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Journal ArticleDOI
Coupled wave theory for thick hologram gratings
TL;DR: In this paper, a coupled wave analysis of the Bragg diffraction of light by thick hologram gratings is given, analogous to Phariseau's treatment of acoustic gratings and to the dynamical theory of X-ray diffraction.
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.
Journal ArticleDOI
Single-mode fibre fractional wave devices and polarisation controllers
TL;DR: In this article, the authors describe new single-mode fiber optic devices which are completely equivalent to fractional wave plates of classical optics and employ a very simple configuration which uses the stress birefringence induced by bending the fibre.
Journal ArticleDOI
holographic storage in electrooptic crystals. II. beam coupling—light amplification
TL;DR: In this paper, the theory of energy transfer between two coupled beams writing holograms in electrooptic crystals is developed and the gain is calculated for different processes causing holographic recording in the crystal.
Journal ArticleDOI
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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Transmission of time modulated optical signals through an absorbing photorefractive crystal
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