Shaping of photorefractive two-wave coupling by fast phase modulation

Kh, Ringhofer; Vp, Kamenov; Sturman, B.; Chernykh, A. I.

doi:10.1103/physreve.61.2029

Cited by 15 publications

(5 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The symmetry properties of the coupled-wave equations have been used recently for analysis of particular photorefractive effects [15,16]. A full-scale formulation of the novel approach to the description of the readout processes is, however, still missing.…”

Section: Introductionmentioning

confidence: 99%

Description of readout processes during strong beam coupling

Sturman

Giel²

2004

Phys. Rev. E

View full text Add to dashboard Cite

We show, using the symmetry properties of the coupled-wave equations for the transmission and reflection geometries, that any readout characteristic of dynamic spatially nonuniform index gratings in photorefractive crystals can be explicitly expressed through the characteristics of the recording light beams. This approach is applied to describe the impact of beam coupling on the diffraction efficiency of dynamic gratings and on the output intensities of the light beams at instantaneous input phase changes (light grating translation). Further implications of this general approach are discussed.

show abstract

Section: Introductionmentioning

confidence: 99%

Description of readout processes during strong beam coupling

Sturman

Giel²

2004

Phys. Rev. E

View full text Add to dashboard Cite

show abstract

“…6.8a exhibits this trajectory for 6t r # t # 8t r ; about 7 revolutions occur during that time. This shows clearly that the point Ref 27) with N ¼ 0, AE 1, AE 2, . .…”

Section: Inertial Feedbackmentioning

confidence: 63%

“…In fact, the major effect of the periodic modulation on the grating recording and beam coupling is determined by only one real characteristic parameter [27] …”

Section: A Simple View On the Periodic Statesmentioning

confidence: 99%

“…The higher intensity harmonics result in small oscillations of the fringe positions. Quantitative side of the grating formation in the case of strong phase modulation and beam coupling can be found in [27,28].…”

Section: Light Domainsmentioning

confidence: 99%

“…The conditions for the achievement and specific features of the periodic states have been analyzed for the nonlocal (diffusion) and the resonant (inherent in fast PR materials) nonlinear response [26]. A number of prominent features of the periodic states were interpreted in the terms of theory of fast phase modulation [27]. It was found that the light pattern distribution inside the sample, which is relevant to the periodic states, consists of domains moving with the opposite velocities [28].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Feedback-Controlled Photorefractive Beam Coupling

Sturman

Podivilov

Gorkunov

et al.

Springer Series in Optical Sciences

Self Cite

View full text Add to dashboard Cite

Implementation of certain electronic feedbacks between the optical output and input is able not only to stabilize the photorefractive setups against phase fluctuations, but also to shape the characteristics of grating recording and beam coupling. In particular, the feedback can make the index gratings fully diffractive and transparent. We summarize the results of experimental and theoretical studies of the feedback-controlled beam coupling. This includes the feedback loop specification, an analysis of the operation modes of the whole nonlinear system, a description of the observable characteristics, and comparison with experiment. We consider both the transmission and reflection coupling geometries and touch upon the major applications.It is important that the feedback-controlled beam coupling represents a fundamentally new nonlinear system, which has no close analogs among the known optical phenomena. This is concerned with several aspects: Formulation of the feedback conditions for the light amplitudes requires a refined notion of the diffractive properties of dynamic index gratings-it cannot be accomplished in the terms of spatially-uniform gratings. Inertia of the feedback loop ensures the permanent operation of the whole system. The conventional set of dynamic equations for the light and grating amplitudes, being supplemented by the feedback conditions, ceases often to admit both the traditional means for analytical analysis and the familiar steady-state solutions. Instead of a steady state, the system arrives at a periodic state that is characterized by a strong phase modulation.

show abstract

Bibliography

2020

Photorefractive Materials for Dynamic Optical Recording

View full text Add to dashboard Cite

Shaping of photorefractive two-wave coupling by fast phase modulation

Cited by 15 publications

References 15 publications

Description of readout processes during strong beam coupling

Description of readout processes during strong beam coupling

Feedback-Controlled Photorefractive Beam Coupling

Bibliography

Contact Info

Product

Resources

About