Generation of high-intensity spectral supercontinuum of more than two octaves in a water jet

Tcypkin, Anton; Putilin, S. É.; Melnik, Maksim; Makarov, E. A.; Bespalov, V. G.; Kozlov, S. A.

doi:10.1364/ao.55.008390

Cited by 19 publications

(5 citation statements)

References 31 publications

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“…These studies demonstrated that a typical SC spectrum covers the 400-1100 nm range [177]. A broader SC spectrum spanning wavelengths from 350 to 1400 nm was reported using a thin water jet instead of a thick cell [180]. In the range of anomalous GVD of water (with laser wavelengths above 1 μm), the SC spectrum with the focusing condition-controllable position of the blue peaks was demonstrated when pumped by the fundamental harmonics of the Nd:glass laser (1055 nm) [91].…”

Section: Watermentioning

confidence: 84%

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Ultrafast supercontinuum generation in bulk condensed media

Dubietis¹,

Tamošauskas²,

Šuminas³

et al. 2017

Lith. J. Phys.

167

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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: Watermentioning

confidence: 84%

“…These studies demonstrated that a typical SC spectrum covers the 400 − 1100 nm range 177 . A broader SC spectrum spanning wavelengths from 350 nm to 1400 nm was reported using a thin water jet instead of a thick cell 180 .…”

Section: B Watermentioning

confidence: 94%

Ultrafast supercontinuum generation in bulk condensed media

Dubietis¹,

Tamošauskas²,

Šuminas³

et al. 2017

Lith. J. Phys.

167

View full text Add to dashboard Cite

show abstract

“…SC has a wide range of applications, such as time-resolved excitation and absorption spectroscopy [45], optical pulse compression [46] and the characterization of laser-induced structural transitions [47], etc. The SC generation induced by femtosecond laser in water has been extensively studied in the past few decades, both experimentally and theoretically [39,[48][49][50][51][52][53][54][55][56]. Quite a few approaches are used to study the property of the SC and to control the SC generation [39,[48][49][50][51][52][53][54][55][56].…”

Section: Femtosecond Laser Filamentation and Sc Generation In Watermentioning

confidence: 99%

“…The SC generation induced by femtosecond laser in water has been extensively studied in the past few decades, both experimentally and theoretically [39,[48][49][50][51][52][53][54][55][56]. Quite a few approaches are used to study the property of the SC and to control the SC generation [39,[48][49][50][51][52][53][54][55][56]. For example, the coherence of the SC can be studied by the interference method [39,52].…”

Section: Femtosecond Laser Filamentation and Sc Generation In Watermentioning

confidence: 99%

Supercontinuum Induced by Filamentation of Bessel-Gaussian and Laguerre-Gaussian Beams in Water

Huo

et al. 2022

Applied Sciences

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In this paper, we study the characteristics of the supercontinuum (SC) induced by the filamentation of two typical vortex beams (i.e., Laguerre-Gaussian (LG) and Bessel-Gaussian (BG) beams) in water. By moving the cuvette filled with water along the laser propagation path, we measure the SC induced by the filamentation of the two vortex beams at different positions in water. The results show that the degree of spectral broadening induced by the filamentation of LG beams hardly changes with the change of position, while for BG beams, the spectral broadening induced by filamentation is weak on both sides and strong in the middle. The value of topological charge (TC) affects the length of the filament formed by BG beams; however, its effect on the spectral broadening induced by the filamentation of LG and BG beams is negligible.

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“…Here E is the radiation electric field, z is the direction of propagation, τ = t − n0 c z is the time in the moving frame of reference, t is time and c is the speed of light in vacuum. The parameters n 0 and a characterize the dispersion of the linear refractive index of the medium n(ω) = n 0 + acω 2 , g is related to the nonlinear refractive index coefficient of the medium as n 2 (ω) = 3gc/2 [23,24], ρ is the concentration of atoms in highly excited states, j is current density, generated by free electrons of the plasma induced by the optical radiation field, coefficients α and β characterize the efficiency of population of highly excited electronic states and free carrier generation in the medium, τ is the effective relaxation time of populations of highly excited states and τ c is the average collisional relaxation time of the free electrons in the generated plasma.…”

Section: Intense Ultrashort Optical Pulse Field Dynamics In the Self-...mentioning

confidence: 99%

Temporal field and frequency spectrum of intense femtosecond radiation dynamics in the process of plasma formation in a dielectric medium

et al. 2019

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We consider the propagation of intense femtosecond pulses in a dielectric medium with an induced plasma. This plasma is excited by the strong electric field of the pulses, stimulating sequential electron transition to the conductivity band through excited discrete energy states. It is demonstrated that this simple dynamic model of ultrashort optical pulse propagation in a dielectric medium with self-induced plasma can be applied to experiments on the superbroadening of the pulse spectrum into the long-wavelength range, including terahertz generation, as well as the generation of high-order harmonics.

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Generation of high-intensity spectral supercontinuum of more than two octaves in a water jet

Cited by 19 publications

References 31 publications

Ultrafast supercontinuum generation in bulk condensed media

Ultrafast supercontinuum generation in bulk condensed media

Supercontinuum Induced by Filamentation of Bessel-Gaussian and Laguerre-Gaussian Beams in Water

Temporal field and frequency spectrum of intense femtosecond radiation dynamics in the process of plasma formation in a dielectric medium

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