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Puebla de Zaragoza, Mexico

The National Institute of Astrophysics, Optics and Electronics is a Mexican science research institute located in Tonantzintla, Puebla. Founded by presidential decree on 11 November 1971, it has over 100 researchers in astrophysics, optics, electronics and computing science, with postgraduate programs in these areas. INAOE is one of 30 public research centers sponsored by the National Council of Science and Technology of Mexico . The Institute, in partnership with the University of Massachusetts Amherst, developed the Large Millimeter Telescope / Gran Telescopio Milimétrico on the Puebla-Veracruz border. Wikipedia.

Alonso M.A.,University of Rochester | Bandres M.A.,National Institute of Astrophysics, Optics and Electronics
Optics Letters | Year: 2012

We introduce nonparaxial spatially accelerating waves whose two-dimensional transverse profiles propagate along semicircular trajectories while approximately preserving their shape. We derive these waves by considering imaginary displacements on spherical fields, leading to simple closed-form expressions. The structure of these waves also allows the closed-form description of pulses. © 2012 Optical Society of America. Source

Rodriguez-Lara B.M.,National Institute of Astrophysics, Optics and Electronics
Journal of the Optical Society of America B: Optical Physics | Year: 2014

We study an intensity-dependent quantum Rabi model that can be written in terms of SU(1, 1) group elements and is related to the Buck-Sukumar model for the Bargmann parameter k = 1/2. The spectrum seems to present avoided crossings for all valid parameter sets and, thus, may be integrable. For a degenerate qubit, the model is soluble, and we construct an unbroken supersymmetric partner for it. We discuss the classical simulation of the general model in photonic lattices and show that it presents quasi-periodic reconstruction for a given initial state and parameter set. © 2014 Optical Society of America. Source

Ostrovsky A.S.,Autonomous University of Puebla | Rickenstorff-Parrao C.,Autonomous University of Puebla | Arrizon V.,National Institute of Astrophysics, Optics and Electronics
Optics Letters | Year: 2013

We introduce the concept of the perfect optical vortex whose dark hollow radius does not depend on the topological charge. It is shown analytically and experimentally that such a vortex can be approximately generated in the Fourier transforming optical system with a computer-controlled liquid-crystal spatial light modulator. © 2013 Optical Society of America. Source

Jovanovic Dolecek G.,National Institute of Astrophysics, Optics and Electronics
IEEE Transactions on Education | Year: 2012

An attractive MATLAB-based tool for teaching the basics of autocorrelation function and noise concepts is presented in this paper. This tool enhances traditional in-classroom lecturing. The demonstrations of the tool described here highlight the description of the autocorrelation function (ACF) in a general case for wide-sense stationary (WSS) processes, and for several important special processes including Gaussian white noise (GWN), non-Gaussian white noise, and Gaussian non-white noise. The demonstrations were designed for and introduced in the graduate-level course Introduction to Communications, but would also be appropriate at the undergraduate level in various courses on signals or communications, or in a basic course on probability and random variables. The course description and program evaluations are also included. © 1963-2012 IEEE. Source

Torres-Torres R.,National Institute of Astrophysics, Optics and Electronics
Electronics Letters | Year: 2011

A method to determine the characteristic impedance of transmission lines considering the substrate loss is presented. The extracted data shows that at microwave frequencies the finite loss tangent parameter impacts the characteristic impedance even in a low-loss substrate. © 2011 The Institution of Engineering and Technology. Source

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