Light bullets from near-IR filament in fused silica

Smetanina, Evgeniya; Компанец, В. О.; Dormidonov, A. E.; Чекалин, С. В.; Kandidov, V.P.

doi:10.1088/1612-2011/10/10/105401

Cited by 52 publications

(38 citation statements)

References 50 publications

(56 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It should be noted that on the base of experiments developed in the accumulation mode by averaging over a large series of LBs, many authors interpreted the extended light channels formed by mid-IR femtosecond pulses in transparent dielectrics as long-living LBs, the scale of which does not change along several centimeters distance. These results are contradictory to our numerical and experimental investigations [3] according to which the LB path length is much shorter.…”

contrasting

confidence: 99%

Direct measuring of single-cycle mid-IR light bullets path length in LiF by the laser coloration method

et al. 2017

View full text Add to dashboard Cite

Abstract. A colour-centre structure formed in a LiF crystal under filamentation of a femtosecond mid-IR laser pulse with a power slightly exceeding the critical power for self-focusing has been experimentally and theoretically investigated. A single-cycle light bullet was recorded for the first time by observation of strictly periodic oscillations for the density of the color centers induced in an isotropic LiF crystal under filamentation of a laser beam with a wavelength tuned in the range from 2600 to 3900 nm, which is due to the periodic change in the light field amplitude in the light bullet formed under filamentation under propagation in dispersive medium. The light bullet path length was not more than one millimeter.In contrast to the well-studied phenomena of the light beam squeezing due to selffocusing and wideband ultrashort pulse compression the formation of light bullets (LBs) with a high spatiotemporal light field localization is the result of simultaneous and matched laser radiation selfcompression both in space and time in nonlinear dispersive media. The numerical simulations suggest that such compression method may potentially deliver single optical cycle pulses in the 2-4 μm spectral range. In spite of existing methods for a singlecycle pulse duration measurements such LBs have not been recorded so far. The main reason is that LB diameter is about a few wavelengths and when we measure the whole beam not only the duration of the LB but also essentially longer duration of a background surrounding the LB is measured. The sensitivity of our recording technique is not sufficient to take a proper measurement with a lesser aperture. We proposed a novel method for such measuring based on a well known (from the end of the last century) phenomenon, specific only to nearsingle-cycle pulses, which is very important in attosecond physics -a cyclic transformation of the light field amplitude caused by the phase shift between the carrier wave and the wave packet envelope under propagation in a dispersive medium [1]. This transformation may be recorded by the laser coloration method (LCM), based on microscopic observation of laserinduced long-lived luminescent color centers (CC), which gives a unique possibility to register the filament spatial structure with an accuracy better than one micron after exposure

show abstract

contrasting

confidence: 99%

Direct measuring of single-cycle mid-IR light bullets path length in LiF by the laser coloration method

et al. 2017

View full text Add to dashboard Cite

show abstract

“…We report, that the main spatio-temporal features of the LB formation at 3.1µm in LiF are similar to those for LBs formation at 1.8µm in fused silica [8]. The duration of the LB reaches the value about 2-3 optical cycles (Fig.1 a-b).…”

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

confidence: 71%

“…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.

View full text Add to dashboard Cite

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.

show abstract

“…Eventually, simultaneous time and space compression was demonstrated to favour a new type of filamentation, which produces quasistationary three-dimensional self-compressed light bullets that preserve a narrow beam diameter and a short pulsewidth over a considerable propagation distance in a nonlinear dispersive medium [81]. To this end, the formation of self-compressed spatiotemporal light bullets was experimentally observed in various nonlinear media, such as fused silica, sapphire and BBO, and under a variety of operating conditions [82][83][84][85][86]. Figure 3(c) shows a numerical example illustrating formation and propagation dynamics of the self-compressed spatiotemporal light bullet in the sapphire crystal, which is accompanied Fig.…”

Section: Anomalous Gvdmentioning

confidence: 99%

Ultrafast supercontinuum generation in bulk condensed media

Dubietis¹,

Tamošauskas²,

Šuminas³

et al. 2017

Lith. J. Phys.

167

View full text Add to dashboard Cite

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.

show abstract

Light bullets from near-IR filament in fused silica

Cited by 52 publications

References 50 publications

Direct measuring of single-cycle mid-IR light bullets path length in LiF by the laser coloration method

Direct measuring of single-cycle mid-IR light bullets path length in LiF by the laser coloration method

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

Ultrafast supercontinuum generation in bulk condensed media

Contact Info

Product

Resources

About