Spatial mode cleaning by femtosecond filamentation in air

Prade, B.; Michel, F. C.; Mysyrowicz, A.; Couairon, Arnaud; Buersing, H.; Eberle, Bernd; Krenz, M.; Seiffer, Dirk; Vasseur, Olivier

doi:10.1364/ol.31.002601

Cited by 87 publications

(50 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As being induced by self-focusing and filamentation of intense femtosecond laser pulses, the SC radiation bears high spatial and temporal coherence [19]. The SC beam preserves the same level of spatial coherence as the input laser beam [20], or even shows its improvement due to spatial mode cleaning, which is a universal feature of the filamentation process [21], yielding an excellent focusability of the SC beam. High temporal coherence of the SC radiation stems from a well-defined temporal structure of a femtosecond filament.…”

Section: Introductionmentioning

confidence: 99%

Ultrafast supercontinuum generation in bulk condensed media

Dubietis¹,

Tamošauskas²,

Šuminas³

et al. 2017

Lith. J. Phys.

172

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: Introductionmentioning

confidence: 99%

Ultrafast supercontinuum generation in bulk condensed media

Dubietis¹,

Tamošauskas²,

Šuminas³

et al. 2017

Lith. J. Phys.

172

View full text Add to dashboard Cite

show abstract

“…The nonlinear propagation is first dominated by the optical Kerr response of the medium. The light-induced change of refractive index leads to beam selffocusing [1], pulse spectral broadening [2] and beam profile reshaping [3,4]. For a pulse peak power above a critical value , where  0 is the laser wavelength in vacuum, n 0 the corresponding refractive index and n 2 the nonlinear Kerr index, diffraction is unable to arrest the beam self focusing effect.…”

mentioning

confidence: 99%

“…2(b)). Spatial self compression and self cleaning of the laser beam profile is a telltale of filamentation [4].…”

mentioning

confidence: 99%

Self-Guided Propagation of Ultrashort Laser Pulses in the Anomalous Dispersion Region of Transparent Solids: A New Regime of Filamentation

et al. 2013

Self Cite

View full text Add to dashboard Cite

“…To provide spectra with bandwidth comparable to the reported here the second filamentation stage coupled with essential losses of pulse energy has to be used [10,11,27]. It will be worth to assume, that during the first filamentation stage a self-filtering ability of filaments [28,29] is applied to input beam and performs a spatial modification of original profile towards the symmetrical spatial shape. This modified beam enhances coupling efficiency into the second filament providing the characteristic properties as it www.lphys.org Intensity, a.u.…”

Section: Resultsmentioning

confidence: 94%

Control of compression dynamics by spatially adjustable femtosecond filamentation

Zhavoronkov¹

2009

Laser Phys. Lett.

View full text Add to dashboard Cite

Abstract:The influence of spatial laser field distribution on the formation of femtosecond filaments in Ar and on the consequent pulse compression was investigated. Beams with increased symmetry demonstrate more efficient energy coupling in the filament supporting development of negative spectral chirp and producing broader spectra with a clear expressed shift on shorter wavelengths side. It is found, that modification of the spatial beam profile performs fine control of compression dynamics resulting in phase adjustment of the output pulses approaching optimum for a given experimental configuration. As a demonstration the pulses with initial duration of 45 fs was compressed down to 8.2 fs with 0.9 mJ energy by means of spatially adjustable filamentation. The second harmonic -frequency-resolved optical gating (SH-FROG) traces of the output pulses measured at different experimental conditions

show abstract

Spatial mode cleaning by femtosecond filamentation in air

Abstract: By studying the conical emission of a blue femtosecond laser filament in air, it is shown that self-improvement of the beams' spatial mode quality occurs for a self-guided laser pulse.

Cited by 87 publications

References 16 publications

Ultrafast supercontinuum generation in bulk condensed media

Ultrafast supercontinuum generation in bulk condensed media

Self-Guided Propagation of Ultrashort Laser Pulses in the Anomalous Dispersion Region of Transparent Solids: A New Regime of Filamentation

Control of compression dynamics by spatially adjustable femtosecond filamentation

Contact Info

Product

Resources

About