Listar por autoría "b47f8610-6cb7-4f1a-b97a-e49ffe8be52d"
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20 GHz arbitrary radio-frequency waveform generator based on incoherent pulse shaping
Optical Society of America (2008)We demonstrate a new approach of photonically assisted radiofrequency (RF) waveform generation using a spectrally incoherent light source. The system is based on the so-called generalized frequency-to-time mapping ... -
All-fiber incoherent frequency-to-time mapping method for microwave signal generation with baseband transmission and multicasting support
Elsevier (2008)We present a proof-of-principle experiment for achieving simultaneous distribution of baseband radio-frequency data and up-conversion with broadcasting support over a passive optical network. The technique is based on an ... -
Compressive holography with a single-pixel detector
Optical Society of America (2013)This Letter develops a framework for digital holography at optical wavelengths by merging phase-shifting interferometry with single-pixel optical imaging based on compressive sensing. The field diffracted by an input object ...
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Compressive imaging in scattering media
Optical Society of America (2015)One challenge that has long held the attention of scientists is that of clearly seeing objects hidden by turbid media, as smoke, fog or biological tissue, which has major implications in fields such as remote sensing or ...
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Computational imaging with a balanced detector
Nature Publishing (2016-06-29)Single-pixel cameras allow to obtain images in a wide range of challenging scenarios, including broad regions of the electromagnetic spectrum and through scattering media. However, there still exist several drawbacks that ...
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Diffractive optics for quasi-direct space-to-time pulse shaping
Optical Society of America (2008)The strong chromatic behavior associated with a conventional diffractive lens is fully exploited to propose a novel optical device for pulse shaping in the femtosecond regime. This device consists of two optical elements: ...
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Dispersion management in two-photon microscopy by using diffractive optical elements
Optical Society of America (2013)We demonstrate efficient generation of wide-field fluorescence signals in two-photon microscopy exploiting diffractive optical elements and short pulses by using a dispersion-compensated beam delivery optics module. ...
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Electromagnetic arbitrary waveform generation with broadband incoherent light sources
Optical Society of America (2008-12)Optical engineering: new waveform generation provides the experimentalist with interesting new tools
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Experimental generation of high-contrast Talbot images with an ultrashort laser pulse
Elsevier (2008)A femtosecond Ti:sapphire laser oscillator emitting pulses with 800 nm central wavelength, 10.9 fs pulse width, and 75 MHz repetition rate, combined with a dispersion-compensated diffractive system, was used to implement ...
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Femtosecond digital lensless holographic microscopy to image biological samples
Optical Society of America (2013)The use of femtosecond laser radiation in digital lensless holographic microscopy (DLHM) to image biological samples is presented. A mode-locked Ti:Sa laser that emits ultrashort pulses of 12 fs intensity FWHM, with 800 ...
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Flat-top ultra-wideband photonic filters based on mutual coherence function synthesis
Elsevier (2008)A novel all-incoherent optical circuit that allows for band-pass microwave-photonic filter design is presented and verified through numerical simulation. In contrast to conventional spectrum-sliced optical architectures ...
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High-visibility interference fringes with femtosecond laser radiation
Optical Society of America (2009)We propose and experimentally demonstrate an interferometer for femtosecond pulses with spectral bandwidth about 100 nm. The scheme is based on a Michelson interferometer with a dispersion compensating module. A diffractive ...
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Image transmission through dynamic scattering media by single-pixel photodetection
Optical Society of America (2014)Smart control of light propagation through highly scattering media is a much desired goal with major technological implications. Since interaction of light with highly scattering media results in partial or complete depletion ...
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Imaging through scattering media with single-pixel detection
SPIE (2017)We describe a method to image objects through scattering media based on single-pixel detection and microstructured illumination. Spatial light modulators are used to project a set of microstructured light patterns onto the ...
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Lossless equalization of frequency combs
Optical Society of America (2008)Frequency combs obtained by sinusoidal phase modulation of narrow-band continuous-wave lasers are widely used in the field of optical communications. However, the resulting spectral envelope of the comb is not at. ...
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Optical Filter Based on a Spatially Patterned Kinoform Diffractive Lens
Institute of Electrical and Electronics Engineers (IEEE) (2009)We demonstrate a compact all-diffractive setup for spectral synthesis. The system is composed of a circularly symmetric mask attached to a kinoform diffractive lens. Following diffraction-based analysis, a Fourier transform ...
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Parallel laser micromachining based on diffractive optical elements with dispersion compensated femtosecond pulses
Optical Society of America (2013)We experimentally demonstrate multi-beam high spatial resolution laser micromachining with femtosecond pulses. The effects of chromatic aberrations as well as pulse stretching on the material processed due to diffraction ...
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Real-time acquisition of complex optical fields by binary amplitude modulation
Optical Society of America (2017)We describe, through simulations and experiments, a real-time wavefront acquisition technique using random binary amplitude masks and an iterative phase retrieval algorithm based on the Fresnel propagator. By using a digital ...
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Reconfigurable RF-Waveform Generation Based on Incoherent-Filter Design
Institute of Electrical and Electronics Engineers (2008)Radio-frequency (RF) waveform generators are key devices for a variety of applications, including radar, ultra-wideband communications, and electronic test measurements. Following advances in broadband coherent pulsed ...
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Single-shot color digital holography based on the fractional Talbot effect
Optical Society of America (2011-02-28)We present a method for recording on-axis color digital holograms in a single shot. Our system performs parallel phase-shifting interferometry by using the fractional Talbot effect for every chromatic channel simultaneously. ...
