Filamentation and light bullet formation dynamics in solid-state dielectric media with weak, moderate and strong anomalous group velocity dispersion

Gražulevičiūtė, Ieva; Garejev, N.; Majus, D.; Jukna, Vytautas; Tamošauskas, G.; Dubietis, A.

doi:10.1088/2040-8978/18/2/025502

Cited by 19 publications

(5 citation statements)

References 32 publications

(53 reference statements)

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“…The numerical simulations suggest that mid-infrared pulses may be self-compressed down to a single optical cycle limit 80 . To this end, generation of filament-induced spatiotemporal light bullets, which are self-compressed down to or even below two optical cycles was experimentally reported in various bulk solid-state dielectric media [84][85][86][87]158,195 , as noted in the previous sections of the paper. However, fully evolved self-compressed light bullets contain just a relatively small fraction of the input energy and exhibit dispersive broadening as they leave the nonlinear medium and propagate in free space 83 , and these features may appear undesirable for a range of practical applications.…”

Section: Power Scaling and Applications To Pulse Compressionmentioning

confidence: 81%

“…3(a). Experimental measurements show that the pulse splitting prevails even in the case of weak anomalous GVD 87 , where the amount of material dispersion is too small to compress the spectrally broadened pulse.…”

Section: B Anomalous Gvdmentioning

confidence: 99%

“…3(a). Experimental measurements show that pulse splitting prevails even in the case of weak anomalous GVD [87], where the amount of material dispersion is too small to compress the spectrally broadened pulse. Figure 4 presents a comparison of the numerically simulated axial SC spectra generated by selffocusing and filamentation of 100 fs pulses in a 4 mm-thick sapphire crystal, in the regimes of normal (input wavelength 800 nm), zero (1.3 μm) and anomalous (2.0 μm) GVD.…”

Section: Zero Gvdmentioning

confidence: 99%

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Ultrafast supercontinuum generation in bulk condensed media

Dubietis¹,

Tamošauskas²,

Šuminas³

et al. 2017

Lith. J. Phys.

156

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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: Power Scaling and Applications To Pulse Compressionmentioning

confidence: 81%

Section: B Anomalous Gvdmentioning

confidence: 99%

Section: Zero Gvdmentioning

confidence: 99%

See 1 more Smart Citation

Ultrafast supercontinuum generation in bulk condensed media

Dubietis¹,

Tamošauskas²,

Šuminas³

et al. 2017

Lith. J. Phys.

156

View full text Add to dashboard Cite

show abstract

“…As compared to the case of lossless self-compression, the self-compressed peak contained just 33% of the transmitted energy, while the rest of energy was located in wellpronounced sidelobes, which developed due to spatiotemporal reshaping of the entire wave packet. Large sidelobes and even conditional pulse splitting are the characteristic features of the self-compressed light bullet at the early stage of its formation (at short propagation lengths) in the conditions of large anomalous GVD [30].…”

Section: Resultsmentioning

confidence: 99%

A compact, self-compression-based sub-3 optical cycle source in the $3\mbox{--}4\,\mu {\rm{m}}$ spectral range

Marcinkevičiūtė

Garejev

Šuminas

et al. 2017

J. Opt.

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We report on the experimental realization of a compact, Ti:sapphire laser-pumped mid-infrared light source, which delivers sub-3 optical cycle pulses in the spectral range. The light source employs difference frequency generation in potassium titanyl arsenate crystal by mixing the signal and idler waves from a commercial near-infrared optical parametric amplifier and subsequent optical parametric amplification in LiIO3 crystal. The amplified sub-100 fs mid-infrared pulses are self-compressed down to sub-3 optical cycles by nonlinear propagation in few mm thick YAG, CaF2 and BaF2 crystals featuring anomalous group velocity dispersion in that spectral range. The self-compression is performed without the onset of self-focusing effects, hence maintaining a homogenous beam profile with energy throughput efficiency of above 90%, yielding the self-compressed pulses with sub- energy. Even larger self-compression factors (down to sub-2 optical cycles) were achieved in the filamentation regime, simultaneously producing an ultrabroadband supercontinuum, extending from the visible to the mid-infrared.

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“…This can be easily quantitatively compared to numerical simulation results. This has been performed as spatially resolved crosscorrelation [43]. To provide the evolution of the spatiotemporal dynamics along the propagation, the pulse has to be measured at intermediate propagation distances.…”

Section: Characterization Of the Pulse Distributionmentioning

confidence: 99%

Ultrafast Laser Micro-Nano Structuring of Transparent Materials with High Aspect Ratio

Courvoisier

2020

Handbook of Laser Micro- And Nano-Engineering

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Ultrafast lasers are ideal tools to process transparent materials because they spatially confine the deposition of laser energy within the material's bulk via nonlinear photoionization processes. Nonlinear propagation and filamentation were initially regarded as deleterious effects. But in the last decade, they turned out to be benefits to control energy deposition over long distances. These effects create very high aspect ratio structures which have found a number of important applications, particularly for glass separation with non-ablative techniques. This chapter reviews the developments of in-volume ultrafast laser processing of transparent materials. We discuss the basic physics of the processes, characterization means, filamentation of Gaussian and Bessel beams and provide an overview of present applications.

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Filamentation and light bullet formation dynamics in solid-state dielectric media with weak, moderate and strong anomalous group velocity dispersion

Cited by 19 publications

References 32 publications

Ultrafast supercontinuum generation in bulk condensed media

Ultrafast supercontinuum generation in bulk condensed media

A compact, self-compression-based sub-3 optical cycle source in the $3\mbox{--}4\,\mu {\rm{m}}$ spectral range

Ultrafast Laser Micro-Nano Structuring of Transparent Materials with High Aspect Ratio

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