Synthesis of fractal light pulses by quasi-direct space-to-time pulse shaping

Mendoza-Yero, Omel; Alonso, Benjamín González; Mínguez‐Vega, Gladys; Sola, Íñigo J.; Láncis, Jesús; Monsoriu, Juan A.

doi:10.1364/ol.37.001145

Cited by 14 publications

(8 citation statements)

References 24 publications

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“…Examples of exact fractals include optical fractals formed using self-similar structures. 4, 5 Despite the above facts, exact fractals have been found in nonlinear dynamics, which is rather surprising in view of the strong sensitivity of nonlinear systems. They are space-domain soliton fractals, demonstrated numerically, and time-domain soliton fractals, observed experimentally.…”

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confidence: 99%

Spontaneous Exact Spin-Wave Fractals in Magnonic Crystals

et al. 2018

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Exact fractals of nonlinear waves that rely on strong dispersion and nonlinearity and arise spontaneously out of magnetic media were observed for the first time. The experiments make use of a microwave to excite a spin wave in a quasi-one-dimensional magnonic crystal. When the power of the input microwave (P_{in}) is low, the output signal has a power-frequency spectrum that consists of a single peak. When P_{in} is increased to a certain level, new side modes are generated through modulational instability, resulting in a comblike frequency spectrum. With a further increase in P_{in}, each peak in the frequency comb can evolve into its own finer comb through the modulational instability. As P_{in} is increased further, one can observe yet another set of finer frequency combs. Such a frequency-domain fractal manifests itself as multiple layers of amplitude modulation in the time-domain signal.

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confidence: 99%

Spontaneous Exact Spin-Wave Fractals in Magnonic Crystals

et al. 2018

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“…First, we introduce a diffractiveonly optical system, which is able not only to modify at will the temporal [6][7][8][9] or spectral [10] profile of ultrashort light pulses, but also to focus them within a spot area of a few microns (typically less than 20). This kind of system is well suited for applications including molecular alignment or material processing.…”

Section: Diffractive Control Of Ultrashort Pulsesmentioning

confidence: 99%

Spatio-temporal control of ultra-short pulses by using diffractive optical elements

Martinez-Leon

Mendoza-Yero

Mínguez‐Vega

et al. 2012

2012 11th Euro-American Workshop on Information Optics

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Diffractive optical elements (DOEs) have shown their applicability to control the spatio-temporal characteristics of ultra-short laser pulses. DOEs can provide high efficiency, compactness, very low material dispersion and, when implemented with spatial light modulators, real-time pulse engineering. In this communication, we report management of temporal and spectral profiles of ultra-short pulses by means of a quasi-direct space-to-time (QDST) pulse shaper. Moreover, we present spatio-temporal control, including dispersion compensation, by DOEs, and applications for activating nonlinear processes. On the other hand, we have achieved complete spatial control of ultra-short pulses, overcoming spatial chirp effects. The methods and experiments presented in this communication illustrate the capabilities of DOEs to control ultra-short laser pulses and their suitability for a variety of applications.

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“…It is a versatile, accurate, and simple technique to obtain the spatio-temporal phase of a spatio-temporally complex pulse. Its high temporal and spatial resolutions (femtoseconds and micrometers, respectively) have allowed to obtain complex distribution of light of, for example, diffractive optical elements [20], non-linear effects or few-cycle pulses. The different spatio-temporal structures of pulses propagated to mono-modal and multi-modal waveguides are also presented.…”

Section: Introductionmentioning

confidence: 99%

Ultrashort pulse propagation through depressed-cladding channel waveguides in YAG crystal: Spatio-temporal characterization

Morales-Vidal

Sola

Castillo

et al. 2020

Optics & Laser Technology

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Inscription of optical waveguides by direct femtosecond laser irradiation has become a very versatile tool for the development of integrated photonic devices, such as waveguide lasers, frequency converters or photonic lanterns, among many others. The potential application of such devices for the control and manipulation of ultrashort pulses requires the precise knowledge of the temporal distortions that may be induced in the pulse propagation. Currently, research in this topic is scarce, and to our knowledge there is no previous experimental study on the spatio-temporal characterization at the output of waveguides inscribed inside crystals. Here, we have firstly fabricated depressedcladding waveguides with different modal behavior in YAG crystal by direct femtosecond laser irradiation. Then, we implemented an experimental method based on the fiber coupler assisted spectral interferometry technique, that allows obtaining: 1) the temporal dispersion of a pulse at the output of an inscribed waveguide and, 2) full spatio-spectral and spatio-temporal characterization of the output of single-mode and multi-mode waveguides. Our results suggest that the main contribution to the pulse dispersion is due to the material dispersion. Moreover, we found that multimodal waveguides may induce an appreciable inhomogeneity in the temporal features of the pulses that needs to be taken into account in the design of complex devices.

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Synthesis of fractal light pulses by quasi-direct space-to-time pulse shaping

Cited by 14 publications

References 24 publications

Spontaneous Exact Spin-Wave Fractals in Magnonic Crystals

Spontaneous Exact Spin-Wave Fractals in Magnonic Crystals

Spatio-temporal control of ultra-short pulses by using diffractive optical elements

Ultrashort pulse propagation through depressed-cladding channel waveguides in YAG crystal: Spatio-temporal characterization

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