Self-reconstructing spatiotemporal light bullets

Gražulevičiūtė, Ieva; Tamošauskas, G.; Jukna, Vytautas; Couairon, Arnaud; Faccio, Daniele; Dubietis, A.

doi:10.1364/oe.22.030613

Cited by 25 publications

(19 citation statements)

References 36 publications

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“…Nonlinear Xwaves [93,94] and O-waves [95] are named because of their evident X-like and O-like shapes, respectively, which appear in both the near-and the far-fields. Moreover, the interpretation of light filaments in the framework of conical waves readily explains the distinctive propagation features of light filaments such as the sub-diffractive propagation in the free space [83,92] and self-reconstruction after hitting physical obstacles [96][97][98], which are universal and regardless of the sign of material GVD, and which were verified experimentally as well. Therefore all subsequent features of the filament propagation in the regime of normal GVD, i.e.…”

Section: Conical Emissionmentioning

confidence: 54%

Ultrafast supercontinuum generation in bulk condensed media

Dubietis¹,

Tamošauskas²,

Šuminas³

et al. 2017

Lith. J. Phys.

171

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Nonlinear propagation of intense femtosecond laser pulses in bulk transparent media leads to a specific propagation regime, termed femtosecond filamentation, which in turn produces dramatic spectral broadening, or superbroadening, termed supercontinuum generation. Femtosecond supercontinuum generation in transparent solids represents a compact, efficient and alignment-insensitive technique for generation of coherent broadband radiation at various parts of the optical spectrum, which finds numerous applications in diverse fields of modern ultrafast science. During recent years, this research field has reached a high level of maturity, both in understanding of the underlying physics and in achievement of exciting practical results. In this paper we overview the state-of-the-art femtosecond supercontinuum generation in various transparent solid-state media, ranging from wide-bandgap dielectrics to semiconductor materials and in various parts of the optical spectrum, from the ultraviolet to the mid-infrared spectral range. A particular emphasis is given to the most recent experimental developments: multioctave supercontinuum generation with pumping in the mid-infrared spectral range, spectral control, power and energy scaling of broadband radiation and the development of simple, flexible and robust pulse compression techniques, which deliver few optical cycle pulses and which could be readily implemented in a variety of modern ultrafast laser systems.

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Section: Conical Emissionmentioning

confidence: 54%

Ultrafast supercontinuum generation in bulk condensed media

Dubietis¹,

Tamošauskas²,

Šuminas³

et al. 2017

Lith. J. Phys.

171

View full text Add to dashboard Cite

show abstract

“…5a). However, because of the energy reservoir needed for the existence of a light bullet2656, when integrated over the entire beam, the pulse width at z ≈ 4 mm is about 80 fs (Fig. 5b).…”

Section: D Soliton Self-compression In Laser Filaments Versus Light mentioning

confidence: 99%

Power-scalable subcycle pulses from laser filaments

Voronin

Желтиков

2017

Sci Rep

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Compression of optical pulses to ultrashort pulse widths using methods of nonlinear optics is a well-established technology of modern laser science. Extending these methods to pulses with high peak powers, which become available due to the rapid progress of laser technologies, is, however, limited by the universal physical principles. With the ratio P/Pcr of the peak power of an ultrashort laser pulse, P, to the critical power of self-focusing, Pcr, playing the role of the fundamental number-of-particles integral of motion of the nonlinear Schrödinger equation, keeping this ratio constant is a key principle for the power scaling of laser-induced filamentation. Here, we show, however, that, despite all the complexity of the underlying nonlinear physics, filamentation-assisted self-compression of ultrashort laser pulses in the regime of anomalous dispersion can be scaled within a broad range of peak powers against the principle of constant P/Pcr. We identify filamentation self-compression scaling strategies whereby subcycle field waveforms with almost constant pulse widths can be generated without a dramatic degradation of beam quality within a broad range of peak powers, varying from just a few to hundreds of Pcr.

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“…The wavelengths from 2.5 to 4 µm correspond to the anomalous group velocity (GVD) region in a large number if optical materials (silica glass, CaF 2 , BaF 2 , LiF, YAG). Thus, an interplay between Kerr nonlinearity and anomalous GVD leads to a formation of spatially and temporally compressed wavepackets -light bullets (LB) [7][8][9]. In the current work we present the numerical results on the filamentation of 3.1 µm femtosecond laser pulse in LiF.…”

Section: Abstract the Formation Of Light Bullets In Mid-ir Femtosecomentioning

confidence: 99%

Light bullets formation accompanied by odd harmonics generation under Mid-IR femtosecond filamentation in LiF

Smetanina

2017

EPJ Web Conf.

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Abstract. The formation of light bullets in mid-IR femtosecond filamentation is investigated numerically by means of the unidirectional pulse propagation equation (UPPE). A general approach for light bullets formation is presented for condensed media under anomalous GVD. The main parameters of the light bullets are evaluated. The features of super continuum and odd harmonic generation accompanying the light bullets formation are analyzed.

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Self-reconstructing spatiotemporal light bullets

Cited by 25 publications

References 36 publications

Ultrafast supercontinuum generation in bulk condensed media

Ultrafast supercontinuum generation in bulk condensed media

Power-scalable subcycle pulses from laser filaments

Light bullets formation accompanied by odd harmonics generation under Mid-IR femtosecond filamentation in LiF

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