External electric field induced modulation instability of an electromagnetic beam in two-photon photorefractive materials

Konar, S.; Shekhar, Shashank; Shwetanshumala, S.

doi:10.1016/j.optlastec.2010.04.002

Cited by 10 publications

(5 citation statements)

References 29 publications

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“…It refers to unstable propagation of a continuous or quasi-continuous wave(CW) in such a way that the wave disintegrates into large number of localized coherent structures after propagating some distance through nonlinear physical media. MI occurs as a result of interplay between nonlinearity and dispersion in temporal domain, and between nonlinearity and diffraction in the spatial domain [2,5,[81][82][83][84][85][86][87][88][89][90]. A continuous wave (CW) or quasi-continuous wave radiation propagating in a nonlinear medium may suffer instability with respect to weak periodic modulation of the steady state and results in the breakup of CW into a train of ultra short pulses.…”

Section: Modulation Instability(mi)mentioning

confidence: 99%

“…MI has been made extensively studied in a wide range of physical systems like fluids [79], plasmas [81], Bose Einstein condensates [82], discrete nonlinear systems [83], negative index materials [84], soft matter [85], PR media [86,87], optical fibers [88] etc. MI typically occurs in the same parameter region where solitons are observed.…”

Section: Modulation Instability(mi)mentioning

confidence: 99%

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Some aspects of optical spatial solitons in photorefractive media and their important applications

Konar

Trofimov

2015

Pramana - J Phys

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Some selected important properties of photorefractive spatial solitons and their applications have been reviewed in the present paper. Using band transport model, the governing principle of photorefractive nonlinearity has been addressed and nonlinear dynamical equations of spatial solitons owing to this nonlinearity have been discussed. Mechanisms of formation of screening and photovoltaic solitons of three different configurations i.e., bright, dark and grey varieties have been examined.Incoherently coupled vector solitons due to single and two-photon photorefractive phenomena have been highlighted. Modulation instability, which is precursor to soliton formation has been also discused briefly. Finally possible applications of photorefractive spatial solitons have been highlighted.

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Section: Modulation Instability(mi)mentioning

confidence: 99%

Section: Modulation Instability(mi)mentioning

confidence: 99%

Some aspects of optical spatial solitons in photorefractive media and their important applications

Konar

Trofimov

2015

Pramana - J Phys

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“…The electric field is found by solving a particular form of Poisson's equation for the electrostatic potential Ф, with a source charge distribution due to light-induced charge transport. The photorefractive nonlinearity is thus nonlocal [16,17].…”

Section: Nonlinear Dynamic Of Chaos In Electro-optical Bistable Systemmentioning

confidence: 99%

Modulation instability of optical nonlinear media: a route to chaos

Sharif

2011

SPIE Proceedings

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Modulation Instability is known as intrinsic property of a nonlinear medium like Kerr medium or photorefractive medium; through the such media, the system behavior is possible to transit form stationary regime to chaotic regime; this paper deals with Modulation Instability (MI) in a nonlinear medium and investigates the analogy of MI of optical nonlinear medium and the consequent chaotic regime based on extracting Lyapunov exponent through the power spectrum and equivalently intensity-time diagram of MI; the experimental observation truly confirms the results of MI as the route to the chaotic regime.

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“…There have been many advances made in the area of Nonlinear Optics [1][2][3][4][5][6]. Solitons in photonic crystal fibers as well as diffraction Bragg gratings have been studied.…”

Section: Introductionmentioning

confidence: 99%