Papers by sabino chavez-cerda
Frontiers in …, 2003
Summary: Optical trapping, using the single beam gradient trap (optical tweezers), has been widel... more Summary: Optical trapping, using the single beam gradient trap (optical tweezers), has been widely applied in fields such biology, colloidal chemistry, and fundamental optics. The optical forces within such traps result from the transfer of momentum by scattering from the ...
Optics and Photonics News, 2000
Journal of the Optical Society of America B, 2006
We present a numerical study of the wave breakup and soliton formation in a standard single-mode ... more We present a numerical study of the wave breakup and soliton formation in a standard single-mode fiber pumped by variable pulse lengths in the range from 20 to 400 ps in the presence of noise. The average power and the standard deviation of the trailing soliton were calculated. We calculated also the average distance at which the soliton time delay reaches 1.5 times the pulse width. We found that for pulses longer than 100 ps the breakup starts from the amplification of the noisy modulation of the amplitude by the modulation instability mechanism even for very low noise power, while for pulses shorter than 20 ps the breakup starts from the pulse collapse. For intermediate durations, wave breakup starts from the pulse collapse at low noise power, while for higher noise power, modulation instability prevails.
Journal of Optics a-Pure and Applied Optics, 2006
We report on the experimental observation of the effects on the far-field patterns obtained when ... more We report on the experimental observation of the effects on the far-field patterns obtained when a divergent or convergent beam interacts with a thin self-defocusing material. The measurements were performed using a CW laser beam propagated through a cell containing a colloidal system that presents a very large nonlinear refractive index. The high nonlinearity of the colloid allowed for the observation of patterns never investigated before, revealing a quite different behaviour on the far field from a convergent or a divergent beam due to the opposite interaction with the negative Kerr nonlinearity of the medium. An unpredicted relation between the number of generated rings and the nonlinear phase-shift is obtained in the case of a convergent beam. Our results are in good agreement with a model for thin nonlinear media.
Journal of the Optical Society of America. A, Optics, image science, and vision, 2014
In a recent paper, a method for the generation of a long, narrow needle of light was proposed [J.... more In a recent paper, a method for the generation of a long, narrow needle of light was proposed [J. Opt. Soc. Am. A 31, 500 (2014)]. The implications of this on our appreciation of the properties of Bessel beams are discussed.
Optics Letters, 2015
In this work, we present a new family of modes of confocal resonators eigenfunctions of the Fraun... more In this work, we present a new family of modes of confocal resonators eigenfunctions of the Fraunhofer diffraction integral, the elegant Cartesian Laguerre-Hermite-Gaussian modes. We show that these modes can be single-pass or round-trip eigenmodes of the resonator depending on the focal distance of the mirrors and their separation. We study their properties and compare them to the well known normal and elegant Hermite and Laguerre-Gauss modes of laser resonators. The new family of modes are not structurally stable on propagation as normal Gaussian modes nor present a monotonic intensity evolution as the normal and elegant Gaussian modes. We also demonstrate that on propagation, they present the self-healing property.
Latin America Optics and Photonics Conference, 2014
Conference Digest. 2000 International Quantum Electronics Conference (Cat. No.00TH8504), 2000
Abstract Hollow beams have attracted increasing interest in the field of laser cooling and trappi... more Abstract Hollow beams have attracted increasing interest in the field of laser cooling and trapping of neutral atoms. Several groups have used different techniques to generate dark hollow beams (DHB). However, the experimental setups and techniques employed in most of the investigations so far, are rather sophisticated and need usually more than one beam. On the other hand, Bessel beams are easily obtained in practice with a quite simple experimental arrangement. Investigations on the dynamical interplay between ...
Journal of Modern Optics, 2014
In this paper, we demonstrate, numerically and experimentally that using the mask-lens setup used... more In this paper, we demonstrate, numerically and experimentally that using the mask-lens setup used by Durnin to generate Bessel beams Durnin [Phys. Rev. Lett. 58, 1499], it is possible to generate different kinds of propagation invariant beams. A modification in the amplitude or phase of the field that illuminates the annular slit is proposed that corresponds to modulation in frequency space. In particular, we characterize the new invariant beams that were obtained by modulating the amplitude of the annular mask and when the incident field was modulated with a one-dimensional quadratic or cubic phase. Experimental results using an amplitude mask are shown in order to corroborate the numerical predictions.
CLEO/Europe - EQEC 2009 - European Conference on Lasers and Electro-Optics and the European Quantum Electronics Conference, 2009
Abstract This work presents a single-pass diffraction experiment that demonstrates that single ph... more Abstract This work presents a single-pass diffraction experiment that demonstrates that single photons in a vortex beam in passing through three slits arranged in an equilateral triangle can interfere with themselves and provide quantitative information of their total amount of orbital angular momentum (OAM) they carry. For the experiment presented the aperture has been reduced to a very thin triangular slit. A vortex beam is created by a diffractive optical element (DOE) and then it is made to pass through the slit. This work is ...
Frontiers in Optics 2008/Laser Science XXIV/Plasmonics and Metamaterials/Optical Fabrication and Testing, 2008
We present a general theory of self-healing beams and demonstrate that caustic optical fields gen... more We present a general theory of self-healing beams and demonstrate that caustic optical fields generated by an axicon illuminated with a cylindrical wavefront are self-healing when they are partially obstructed by an opaque object.
Laser Processing of Advanced Materials and Laser Microtechnologies, 2003
Optical guiding of micron-sized particles is shown using both Gaussian and zeroth-order Bessel li... more Optical guiding of micron-sized particles is shown using both Gaussian and zeroth-order Bessel light beams. Axial and transverse forces for guiding in both beams are calculated. Experiments show that the Bessel beam allows for extended guiding distances compared to a Gaussian beam, at the expense of guiding velocity.
Frontiers in Optics 2008/Laser Science XXIV/Plasmonics and Metamaterials/Optical Fabrication and Testing, 2008
We demonstrate that the reciprocal lattice in the Fraunhofer diffraction pattern of single photon... more We demonstrate that the reciprocal lattice in the Fraunhofer diffraction pattern of single photons with orbital angular momentum passing through an equilateral triangular slit provides quantitative information of the total amount of orbital angular momentum.
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Papers by sabino chavez-cerda