Femtosecond filamentation in sapphire with diffractive lenses

Borrego-Varillas, Rocío; Romero, Carolina; Mendoza-Yero, Omel; Mínguez‐Vega, Gladys; Gallardo, Iluminada; Aldana, Javier R. Vázquez de

doi:10.1364/josab.30.002059

Cited by 14 publications

(9 citation statements)

References 30 publications

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“…Figure 20(b) shows an example how the spectral intensity within certain spectral regions and the overall shape of the resulting SC spectrum is modified by varying the time delay between the co-filamenting fundamental and second harmonic pulses. An efficient control of the SC spectrum was also performed by changing the relative position of the focus in the nonlinear medium by means of diffractive optics [264,265] or by varying the spatial phase of the input beam with spatial light modulators [266,267]. Fine adjustment of the position of the nonlinear focus was demonstrated by varying the carrier envelope phase of a few-cycle input pulse [268].…”

Section: Control Of Supercontinuum Generationmentioning

confidence: 99%

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: Control Of Supercontinuum Generationmentioning

confidence: 99%

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

“…DLs have been shown to be a powerful tool for the spectral control of SC generation in bulk [31][32][33]. Here, we have demonstrated the dynamic control of the fringe visibility obtained by the interference between SC pulses generated in bulk media by using DMLs encoded into a SLM.…”

Section: Discussionmentioning

confidence: 92%

Dynamic Control of Interference Effects Between Optical Filaments through Programmable Optical Phase Modulation

Borrego-Varillas

Pérez-Vizcaíno

Mendoza-Yero

et al. 2016

J. Display Technol.

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Abstract-Light beams shaped by programmable megapixel spatial light modulators (SLMs) are key to broaden the applications of photonics. In this paper, we consider the application of a SLM for the generation of two mutually coherent white-light continuum optical sources by filamentation of infrared femtosecond pulses in bulk. We demonstrate that the inhomogeneity of the input beam and the longitudinal separation of the generated filaments are crucial parameters that break down the mutual coherence across neighboring filaments. We show that local control over the optical phase enables us to gain fine control over filament interference effects.

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“…Recently, it has been demonstrated [24] that when a femtosecond beam is focused with a diffractive lens, wavelength tunability in the SC signal can be achieved by simply changing the lens-sample relative distance. It was found that the depth at which the filament is formed is closely connected to the SC spectrum [27]. Based on this, the position of the filament, and thus the spectral content of the SC generated signal, could be controlled by slightly modifying the focal length of the DMLs and keeping the pulse energy constant.…”

Section: Resultsmentioning

confidence: 99%

Controlled Multibeam Supercontinuum Generation With a Spatial Light Modulator

Borrego-Varillas

Pérez-Vizcaíno

Mendoza-Yero

et al. 2014

IEEE Photon. Technol. Lett.

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Abstract-We report on deterministic femtosecond multifilamentation in fused silica by encoding a diffractive microlens array into a spatial light modulator. The efficiency and focal length of each microlens are modified through the addressing voltage. This allows for a precise control on the energy coupled to the filaments thus obtaining a homogenized supercontinuum pattern from an inhomogeneous irradiance input distribution. Slight changes in the focal length of the microlenses allow for independent tailoring of the supercontinuum spectra.

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Femtosecond filamentation in sapphire with diffractive lenses

Cited by 14 publications

References 30 publications

Ultrafast supercontinuum generation in bulk condensed media

Ultrafast supercontinuum generation in bulk condensed media

Dynamic Control of Interference Effects Between Optical Filaments through Programmable Optical Phase Modulation

Controlled Multibeam Supercontinuum Generation With a Spatial Light Modulator

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