Journal ArticleDOI
Fresnel diffraction supercontinuum generation
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TLDR
In this article, a stable interference ring pattern inside the conical four-photon emission was observed and attributed to the spatial arrangement of small-scale filaments at different distances in the glass.Abstract:
White supercontinuum (SC) produced from Fresnel diffraction was demonstrated in BK7 glasses using femtosecond laser pulses. For input pulse energy below the threshold for the onset of self-focusing and SC generation, an aperture was placed into the beam before the BK7 glass to redistribute the intensity by diffraction along the propagation axis to produce a stable SC. The SC occurred at various distances from the aperture containing odd number of Fresnel zones, mainly the first. This result plays an important role in studying the properties of SC sources as well as the diffraction field distribution. A distinct and stable interference ring pattern inside the conical four-photon emission is observed and attributed to the spatial arrangement of small-scale filaments at different distances in the glass.read more
Citations
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Book ChapterDOI
Optical nonlinearity in photonic glasses
TL;DR: A review of optical nonlinearity in photonic glasses is given in this article, where the relationship between two-photon absorption and nonlinear refractive index is considered using a formalism developed for crystalline semiconductors.
Proceedings ArticleDOI
Phase-controlled amplification of few-cycle laser pulses
Andrius Baltuška,M. Uiberacker,M. Hentschel,Vladislav S. Yakovlev,Armin Scrinzi,Ferenc Krausz,Th. Udem,Ch. Gohle,Ronald Holzwarth,Theodor W. Hänsch +9 more
TL;DR: In this article, several methods of carrier-envelope phase stabilization of amplified ultrashort laser pulses are presented, and full temporal characterization of the resultant intense few-cycle light waveforms, reproducible with every laser shot, is achieved by combining conventional pulse characterization techniques with observing the signature of soft-X-ray emission.
Proceedings Article
White light supercontinuum interference of self-focused filaments in water
TL;DR: In this paper, the generation of a horizontal array of stable white-light continuum (WLC) filaments in water is observed using a cylindrical plano-convex lens.
Journal ArticleDOI
Femtosecond laser filament-fringes in fused silica.
TL;DR: Linear diffraction was used to modulate intensity distribution across the femtosecond laser beam to create quasi regular arrays of filaments in fused silica to create fringe type of filament distributions that could be controlled and observed over a distance of several millimeters.
Journal ArticleDOI
Diffractive optics for spectral control of the supercontinuum generated in sapphire with femtosecond pulses
Carolina Romero,Rocio Borrego-Varillas,Acner Camino,Gladys Mínguez-Vega,Omel Mendoza-Yero,Juan Hernández-Toro,Javier R. Vázquez de Aldana +6 more
TL;DR: It is shown that a strongly peaked structure appears in the blue region of the supercontinuum spectra that can be easily controlled by simply changing the lens-crystal distance.
References
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Book
The Principles of Nonlinear Optics
TL;DR: In this article, the authors present a general description of wave propagation in nonlinear media, including high-resolution nonlinear optical spectroscopy, and four-wave mixing and mixing.
Journal ArticleDOI
Self-channeling of high-peak-power femtosecond laser pulses in air
TL;DR: The self-channeling of ultrashort laser pulses through 20 m of air was demonstrated and a preliminary model is shown to explain these results.
Journal ArticleDOI
Emission in the Region 4000 to 7000 Å Via Four-Photon Coupling in Glass
Robert R. Alfano,S. L. Shapiro +1 more
TL;DR: In this article, four-photon stimulated scattering has been observed in borosilicate glass under high-power 5300-AA{} picosecond-pulse excitation.
Journal ArticleDOI
Observation of Self-Phase Modulation and Small-Scale Filaments in Crystals and Glasses
Robert R. Alfano,S. L. Shapiro +1 more
TL;DR: In this paper, small-scale filaments were observed in calcite, quartz, sodium chloride, and several glasses under picosecond pulse excitation, and the physical mechanism responsible for these processes is the change in refractive index resulting from electronic distortion.
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