Plasma channels formed by a set of filaments as a guiding system for microwave radiation

Valuev, V. V.; Dormidonov, A. E.; Kandidov, V.P.; Shlenov, S. A.; Kornienko, V. N.; Черепенин, В. А.

doi:10.1134/s1064226910020130

Cited by 35 publications

(14 citation statements)

References 13 publications

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“…Such a dynamic élament can be treated as a virtual line for the directional transfer of the electromagnetic energy [301]. The formation dynamics of a virtual cylindrical waveguide consisting of plasma channels of multiple élaments, the possibility of increasing its effective thickness due to the formation of a multilayer structure and the estimates of the main waveguide parameters for microwave radiation were considered in [302].…”

Section: Dynamic Microwave Waveguidesmentioning

confidence: 99%

Filamentation of high-power femtosecond laser radiation

2009

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The state of the art of investigations on élamentation of a high-power femtosecond laser radiation in transparent media is reviewed. The physical picture of this phenomenon is presented and its relation to the fundamental concepts of nonlinear optics and practical applications is demonstrated. Experimental and theoretical methods are brieêy considered and laser radiation parameters in the case of élamentation are given. The review can be of interest both

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Section: Dynamic Microwave Waveguidesmentioning

confidence: 99%

Filamentation of high-power femtosecond laser radiation

2009

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“…A cylindrical plasma waveguide, whose walls are formed by multiple filamentation of fs laser beam, was proposed to channeling in a number of theoretical papers [21][22][23][24][25]. The implementation of such system with the use of a 100 TW laser facility was explored in [10].…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, the calculation of the IR laser loss inside the laser plasma filaments waveguide should be extended to include the leakage of the laser radiation through the discontinuous plasma layer. The assumption of continuous plasma cladding may be suitable in case of the transmission of electromagnetic waves in microwave band when the transmitted microwave's wavelength ( mw λ ) is much greater than the distance between the neighboring filaments that form the waveguide's cladding [22][23][24][25], while leakage among the filaments should be included when trying to transmit shorter wavelengths such as IR laser radiation.…”

Section: Introductionmentioning

confidence: 99%

Guiding pulsed infrared laser radiation using a femtosecond filament array waveguide for the purpose of remote sensing

Alshershby

Hao

Camino

et al. 2013

International Symposium on Photoelectronic Detection and Imaging 2013: Laser Sensing and Imaging and Applications

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A hollow cylindrical plasma waveguide, which cladding consists of a large number of a chaotically distributed plasma filaments induced by the propagation of femtosecond (fs) laser pulses in air, is shown to support guided modes of pulsed infrared (IR) laser radiation. Taking into account the discontinuity and the finiteness of the waveguide cladding, the loss coefficient loss of the laser radiation is calculated for different spatial configurations. We report how the waveguide loss depends on its structural parameters like normalized plasma diameter, distance between filaments, core-radius, cladding's thickness, and filaments' electron density. For typical plasma parameters, the loss of the fs plasma waveguide is found to be lower than that of freely propagating IR laser beams to distances in the order of the filamentation length. This fact allows the delivery of collimated pulsed laser light over long distances in atmospheric air, which is necessary for optical-based remote sensing and the detection of chemical and biological agents.Plasma waveguide, Femtosecond laser pulse, the loss coefficient, Filamentation, Optical-based remote sensing.

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“…Dynamic balance of focusing cubic (Kerr) nonlinearity and plasma defocusing nonlinearity leads to the formation of a stable extended structure of the radiation -the filament, which is accompanied by a plasma channel [1][2][3] . Plasma channels of laser filament can be used, for instance, to control high-voltage electric discharge in air [4][5] or to form a guiding system for microwave radiation [6][7] .…”

Section: Introductionmentioning

confidence: 99%

Femtosecond laser filament and plasma channels in focused beam in air

Shlenov

Dergachev

Ионин

et al. 2015

18th International School on Quantum Electronics: Laser Physics and Applications

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The filamentation of focused beams at wavelength of 800 and 248 nm in air is studied experimentally and numerically.The results indicate that relatively tight focusing can lead to the coalescence of individual regions of high fluence and high plasma density that result from multiple refocusing, whereas in the case of weak focusing such regions are separated in the pulse propagation direction. The lower multiphoton ionization order in the case of UV radiation leads to a stronger effect of geometric focusing on filament formation. We show the possibility to control the parameters of femtosecond laser plasma filaments by introducing astigmatism in laser beam wavefront. Strong astigmatism can lead to the splitting of the channel into two separate regions. We demonstrate that the self-phase modulation in the thin passthrough dielectric plate decreases the distance to the filament start in air and increases the length of plasma channel.

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Plasma channels formed by a set of filaments as a guiding system for microwave radiation

Cited by 35 publications

References 13 publications

Filamentation of high-power femtosecond laser radiation

Filamentation of high-power femtosecond laser radiation

Guiding pulsed infrared laser radiation using a femtosecond filament array waveguide for the purpose of remote sensing

Femtosecond laser filament and plasma channels in focused beam in air

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