Theory of critical enhancement of photorefractive beam coupling

Ev, Podivilov; Sturman, B.; Gorkunov, M. V.; Vp, Kamenov; Kh, Ringhofer

doi:10.1103/physreve.65.046623

Cited by 3 publications

(2 citation statements)

References 33 publications

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“…Formation of light-induced discontinuities of the refractive index and their impact on the nonlinear beam propagation in AC-biased sillenite crystals were predicted in 1999-2001 [72][73][74][75]. The effect of critical enhancement of PR beam coupling near the threshold of subharmonic generation was presented in 2000-02 [76][77][78]. The effects of temporal and spatial rectification of SCWs in the sillenites have been investigated recently in [79,80].…”

Section: Historical Sketchmentioning

confidence: 96%

“…They influence quantitatively the output characteristics of interacting light beams but do not suppress the major effect. Particular recommendations for experiment, given on the basis of numerical modeling, include the use of thin (% 1 mm) crystals and also the choice of optical configurations and light polarizations [77,78]. No substantial efforts have been made yet to detect the critical enhancement.…”

Section: Critical Enhancement Of Photorefractive Beam Couplingmentioning

confidence: 99%

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Space-Charge Wave Effects in Photorefractive Materials

Sturman

Springer Series in Optical Sciences

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This chapter provides the first systematic description of the basic properties of low-frequency space-charge waves (SCWs) in photorefractive materials, and the effects caused by these weakly damped eigen-modes. The basic properties incorporate the dependences of the wave frequency and damping on the wavevector, and the restrictions on the material parameters necessary to ensure weakness of the wave damping. The unifying feature of the SCW effects is their resonant character. These effects include the known DC and AC enhancement of the photorefractive response (treated as the linear resonance), the subharmonic generation (treated as parametric excitation of SCWs), the low-frequency peculiarities of the nonlinear response, and also a number of effects caused by the joint action of the optical and material nonlinearities. While an exposition of the concepts lies at the center of this chapter, it also gives a review of experimental studies relevant to the subject matter and a historical sketch.

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Section: Historical Sketchmentioning

confidence: 96%

Section: Critical Enhancement Of Photorefractive Beam Couplingmentioning

confidence: 99%

Space-Charge Wave Effects in Photorefractive Materials

Sturman

Springer Series in Optical Sciences

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Photorefractive space–charge field formation: linear and nonlinear effects

Johansen

2003

J. Opt. A: Pure Appl. Opt.

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Diffractive properties of volume phase gratings in photorefractive sillenite crystals of arbitrary cut under the influence of an external electric field

et al. 2003

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We study the influence of bias dc electric field on the optical properties of volume phase gratings formed in optically active photorefractive sillenite crystals. By considering a general case where the external electric bias direction, the grating vector orientation, the light propagation direction (crystal cut), and state of polarization are arbitrary, we deduce analytical expressions for the diffraction efficiency and the polarization state of the diffracted beam. The influence of the inverse piezoelectric effect is taken into account both in the uniform and the spatially varying part of the impermeability tensor, as well as into the calculation of the effective static permittivity. A theoretical comparative study of the dynamic behavior of the diffraction efficiency as a function of the physical parameters that affect the diffraction process (crystal cut, electric bias, input polarization, and grating orientation) along with experimental verification is provided. The general analytical solution provides means of exploitation of the capabilities of sillenite crystals in several applications.

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Theory of critical enhancement of photorefractive beam coupling

Cited by 3 publications

References 33 publications

Space-Charge Wave Effects in Photorefractive Materials

Space-Charge Wave Effects in Photorefractive Materials

Photorefractive space–charge field formation: linear and nonlinear effects

Diffractive properties of volume phase gratings in photorefractive sillenite crystals of arbitrary cut under the influence of an external electric field

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