Whole life cycle of femtosecond ultraviolet filaments in water

Jarnac, Amélie; Tamošauskas, G.; Majus, D.; Houard, Aurélien; Mysyrowicz, A.; Couairon, Arnaud; Dubietis, A.

doi:10.1103/physreva.89.033809

Cited by 44 publications

(19 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…With the ultraviolet pump pulses generated by the frequency doubling of an amplified Ti:sapphire laser output, the measured SC spectra covered wavelength ranges of 290-530 nm [146] and 350-550 nm [138], as reported with pump wavelengths of 393 and 400 nm, respectively, and under slightly different external focusing conditions. With the pump wavelengths in the visible spectral range, the SC spectrum from 400 to 650 nm was generated with 527 nm self-compressed femtosecond second harmonic pulses from the Nd:glass laser [175] and from 450 to 720 nm with 594 nm pulses from a rhodamine 6G dye laser [11].…”

Section: Watermentioning

confidence: 99%

“…The general interpretation of focusing/refocusing cycles is based on the socalled dynamic spatial replenishment scenario, which assumes alternating cycles of self-focusing due to the Kerr effect and self-defocusing due to free electron plasma and which was originally proposed to explain the illusion of long-distance selfguided propagation of high-power pulses in gaseous media [137]. A more recent experimental and numerical study of the full spatiotemporal evolution of light filaments versus the propagation distance in water unveiled the intimate connections between complex propagation effects: focusing and refocusing cycles, nonlinear absorption, pulse splitting and replenishment, supercontinuum generation and conical emission [138]. More specifically, whenever the self-focusing wave packet (the ultrashort pulsed laser beam) approaches the nonlinear focus, multiphoton absorption attenuates its central part, which after the pulse splitting is reshaped into a ring-like structure.…”

Section: Practical Considerationsmentioning

confidence: 99%

See 1 more Smart Citation

Ultrafast supercontinuum generation in bulk condensed media

Dubietis¹,

Tamošauskas²,

Šuminas³

et al. 2017

Lith. J. Phys.

Self Cite

156

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

Section: Watermentioning

confidence: 99%

Section: Practical Considerationsmentioning

confidence: 99%

Ultrafast supercontinuum generation in bulk condensed media

Dubietis¹,

Tamošauskas²,

Šuminas³

et al. 2017

Lith. J. Phys.

Self Cite

156

View full text Add to dashboard Cite

show abstract

“…[35][36][37] Indeed, hot spots in the central part of the beam corresponding to filament formation were directly observed in our experiments, while the radial lobes had intensities too low to produce a filament as seen in the image of the inset of Fig. 1.…”

Section: Experimental Details Results and Discussionmentioning

confidence: 75%

Extension of filament propagation in water with Bessel-Gaussian beams

Kaya

Sayrac

et al. 2016

AIP Advances

View full text Add to dashboard Cite

We experimentally studied intense femtosecond pulse filamentation and propagation in water for Bessel-Gaussian beams with different numbers of radial modal lobes. The transverse modes of the incident Bessel-Gaussian beam were created from a Gaussian beam of a Ti:sapphire laser system by using computer generated hologram techniques. We found that filament propagation length increased with increasing number of lobes under the conditions of the same peak intensity, pulse duration, and the size of the central peak of the incident beam, suggesting that the radial modal lobes may serve as an energy reservoir for the filaments formed by the central intensity peak.

show abstract

“…However, due to the severe distortion of the laser pulse during nonlinear propagation and ionization, complete characterization of spatiotemporal intensity distribution is extremely difficult and such measurements have so far been restricted to filamentation in short water cells. 39 Indirect estimations 40 have shown that the maximum laser intensity in femtosecond filaments in 1 atm air is clamped at the order of $10 13 W/cm 2 .…”

Section: B Measurement Of Electron Density In a Femtosecond Filamentmentioning

confidence: 99%

The extreme nonlinear optics of gases and femtosecond optical filamentation

et al. 2014

View full text Add to dashboard Cite

Under certain conditions, powerful ultrashort laser pulses can form greatly extended, propagating filaments of concentrated high intensity in gases, leaving behind a very long trail of plasma. Such filaments can be much longer than the longitudinal scale over which a laser beam typically diverges by diffraction, with possible applications ranging from laser-guided electrical discharges to high power laser propagation in the atmosphere. Understanding in detail the microscopic processes leading to filamentation requires ultrafast measurements of the strong field nonlinear response of gas phase atoms and molecules, including absolute measurements of nonlinear laser-induced polarization and high field ionization. Such measurements enable the assessment of filamentation models and make possible the design of experiments pursuing applications. In this paper, we review filamentation in gases and some applications, and discuss results from diagnostics developed at Maryland for ultrafast measurements of laser-gas interactions. V C 2014 AIP Publishing LLC.

show abstract

Whole life cycle of femtosecond ultraviolet filaments in water

Cited by 44 publications

References 43 publications

Ultrafast supercontinuum generation in bulk condensed media

Ultrafast supercontinuum generation in bulk condensed media

Extension of filament propagation in water with Bessel-Gaussian beams

The extreme nonlinear optics of gases and femtosecond optical filamentation

Contact Info

Product

Resources

About