RI ITBA :: Examinando porby browse.metadata.subject "FIBRAS OPTICAS"

Examinando por Materia "FIBRAS OPTICAS"

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Characteristics and stability of soliton crystals in optical fibres for the purpose of optical frequency comb generation
(2017-06) Zajnulina, Marina; Böhm, M.; Bodenmüller, D.; Blow, K.; Chavez Boggioa, J. M.; Rieznik, Andrés; Roth, M. M.
"We study the properties of a soliton crystal, a bound state of several optical pulses that propagate with a fixed temporal separation through the optical fibres of the proposed approach for generation of optical frequency combs (OFC) for astronomical spectrograph calibration. This approach - also being suitable for subpicosecond pulse generation for other applications - consists of a conventional single-mode fibre and a suitably pumped Erbium-doped fibre. Two continuous-wave lasers are used as light source. The soliton crystal arises out of the initial deeply modulated laser field at low input powers; for higher input powers, it dissolves into free solitons. We study the soliton crystal build-up in the first fibre stage with respect to different fibre parameters (group-velocity dispersion, nonlinearity, and optical losses) and to the light source characteristics (laser frequency separation and intensity difference). We show that the soliton crystal can be described by two quantities, its fundamental frequency and the laser power-threshold at which the crystal dissolves into free solitons. The soliton crystal exhibits features of a linear and nonlinear optical pattern at the same time and is insensitive to the initial laser power fluctuations. We perform our studies using the numerical technique called Soliton Radiation Beat Analysis."
Dispersive waves in optical fibers with a zero-nonlinearity wavelength
(2021-08) Sparapani, Alexis; Linale, N.; Grosz, Diego; Bonetti, Juan I.; Fierens, Pablo Ignacio; Hernández, Santiago M.
"We present results on dispersive waves radiated by solitons in the context of fibers with arbitrary frequency-dependent nonlinearities. In particular, we focus on the effect of a zero-nonlinearity wavelength within the spectral region of interest."
Doubly periodic dispersion maps for 10 and 40 Gbit/s ultra-long-haul transmission
(2004-09) Grosz, Diego; Banerjee, S.; Agarwal, A.; Küng, A. P.; Maywar, D. N.
"Optical transmission employing doubly periodic dispersion maps at 10 and 40 Gbit/s data rates is reported. The implications of these transmission results in providing added degrees of flexibility in network design, in particular, in applications such as optical add-drops and hybrid data rate systems, are discussed. "
Estudio de la interoperabilidad entre distintos equipamientos DWDM
(2017) Sequeira, Pedro Ignacio; Fierens, Pablo Ignacio
"Este trabajo de especialización propone el estudio experimental de diversos aspectos relacionados con la compatibilidad a nivel funcional entre equipamientos de transmisión DWDM de distintas marcas."
A geometrical view of scalar modulation instability in optical fibers
(2017) Hernández, Santiago M.; Fierens, Pablo Ignacio; Sánchez, Alfredo D.; Grosz, Diego; Bonetti, Juan I.
"Full models of scalar modulation instability (MI) in optical fibers available in the literature usually involve complex formulations. In this paper, we present a novel approach to the analysis of MI in optical fibers by means of a simple geometrical description in the power versus frequency plane. This formulation allows us to relate the shape of the MI gain to any arbitrary dispersion profile of the medium, thus providing a simple insight. As a result, we derive a straightforward explanation of the nontrivial dependence of the cutoff power on high-order dispersion and explicitly derive the power that maximizes the gain. Our approach puts forth a tool to synthesize a desired MI gain with the potential application to a number of parametric-amplification and supercontinuum-generation devices whose initialstage dynamics rely upon MI."
A higher-order perturbation analysis of the nonlinear Schrödinger equation
(2019-06) Bonetti, Juan I.; Hernández, Santiago M.; Fierens, Pablo Ignacio; Grosz, Diego
"A well-known and thoroughly studied phenomenon in nonlinear wave propagation is that of modulation instability (MI). MI is usually approached as a perturbation to a pump, and its analysis is based on preserving only terms which are linear on the perturbation, discarding those of higher order. In this sense, the linear MI analysis is relevant to the understanding of the onset of many other nonlinear phenomena, such as supercontinuum generation, but it has limitations as it can only be applied to the propagation of the perturbation over short distances. In this work, we propose approximations to the propagation of a perturbation, consisting of additive white noise, that go beyond the linear modulation instability analysis, and show them to be in excellent agreement with numerical simulations and experimental measurements."
Impact of DCF properties on system design
(2006) Essiambre, René-Jean; Winzer, Peter J.; Grosz, Diego
"The dispersion-compensating ﬁber is an important optical element of current and future optical networks. In this paper, we review the impact that various properties of dispersion-compensating ﬁbers has on the performance of optical communication systems."
Optimum integration procedures for supercontinuum simulation
(2012) Rieznik, Andrés; Heidt, Alexander M.; König, Pablo; Bettachini, Víctor A.; Grosz, Diego
"We study numerical solutions of the generalized nonlinear Schrödinger equation (GNLSE), focusing on the advantage of integrating the nonlinear part of the equation in the frequency domain (FD), rather than in the time domain (TD), when simulating supercontinuum generation in optical fibers. We show that integration of the nonlinear operator in the FD is more efficient than its integration in the TD. We analyze different adaptive stepsize algorithms in combination with the interaction picture integration method and show that their performance strongly depends on whether integration of the nonlinear operator is performed in the FD or TD. We find that the most efficient procedure for supercontinuum simulation in optical fibers results from solving the nonlinearity in the FD and applying the recently introduced conservation quantity error adaptive step-size algorithm."
Performance of non-fibre based dispersion compensation for long-haul 10.7 Gbit/s DWDM transmission
(2004) Grosz, Diego; Maywar, D. N.; Küng, A. P.; Agarwal, A.; Banerjee, S.
"Non-fibre based in-line dispersion compensation is employed to achieve long-haul transmission of 80 channels at 10.7 Gbit=s bit rate over 1200 km of LEAF fibre. Average system margins of more than 4 dB and small transmission are demonstrated. The additional penalty incurred by the periodic nature of the dispersion compensator is assessed."
Quasi-analytical perturbation analysis of the generalized nonlinear Schrödinger equation
(2019) Bonetti, Juan I.; Hernández, Santiago M.; Fierens, Pablo Ignacio; Temprana, Eduardo G.; Grosz, Diego
"The Generalized Nonlinear Schrödinger Equation (GNLSE) finds several applications, especially in describing pulse propagation in nonlinear fiber optics. A well-known and thoroughly studied phenomenon in nonlinear wave propagation is that of modulation instability (MI). MI is approached as a weak perturbation to a pump and the analysis is based on preserving those terms linear on the perturbation and disregarding higher-order terms. In this sense, the linear MI analysis is relevant to the understanding of the onset of many other nonlinear phenomena, but its application is limited to the evolution of the perturbation over short distances. In this work, we propose quasi-analytical approximations to the propagation of a perturbation consisting of additive white noise that go beyond the linear modulation instability analysis. Moreover, we show these approximations to be in excellent agreement with numerical simulations and experimental measurements. "
Redes GPON-FTTH, evolución y puntos críticos para su despliegue en Argentina
(2016) Osorio, Álvaro; Ibañez, Miguel
"Desplegar un análisis del desarrollo de la tecnología GPON-FTTH en Argentina, tomando en consideración sus inicios, su despliegue, su capacidad de crecimiento, comparativa con otras tecnologías, sus virtudes y desventajas, además de su impacto en el mercado laboral y educativo."
Redes ópticas como Sistema Alerta Temprana de Sismos (R.O.S.A.T.S.)
(2012) Ibañez, Miguel Ángel; Duchowicz, Ricardo
"(...) el presente trabajo presenta, analiza y propone de manera inovadora utilizar -con mínimo costo adicional- las redes de transporte ópticas de telecomunicaciones que se construyen actualmente en todo el país (REFEFO), como una red de alerta temprana de sismos, agregando así valor al proyecto inicial "Argentina Conectada."
Redes ópticas, evolución en servicio y tecnología
(2010) Pérez, Walter Diego; Ibañez, Miguel
"Demostrar como las operadoras de telecomunicaciones, acompañan a la evolución tecnológica con el afán de cubrir sus necesidades de ancho de banda, y de esta manera poder brindarles a sus clientes una gama de nuevos servicios que van apareciendo día a día en el mercado. Es importante destacar que hay soluciones de paso que utilizaron algunas operadoras sobre el mismo par cobre, evitándose de esta manera realizar gastos enormes de despliegues inmediatos. Estas técnicas no se emplearon en nuestro país pero igualmente son objeto de este análisis. Estos gastos que se están considerando se van a intentar demostrar que no son tales, en principio el reemplazar toda una estructura de cobre por una tecnología nueva como la fibra óptica es de un costo enorme y a priori no posible de presentar a los accionistas de una empresa. Luego la misma se compensa, hasta que termina siendo más económica y de alto valor para cada compañía (CAPEX y OPEX)."
Simulación de lambdas de 40/100 Gbps en redes DWDM
(2014) Deslarmes, Javier Alejandro; Riesnik, Andrés
"En este trabajo se implementa un modelo optimizado para la simulación de sistemas de transmisión de datos sobre fibras ópticas."
Sistema de fotometría de fibra óptica para registrar actividad neuronal en animales en libre movimiento
(2021) Chiesa Docampo, Franco; Piriz, Joaquín
"El objetivo de este trabajo es presentar la investigación y desarrollo de un sistema cuyo fin es registrar por medios ópticos la actividad poblacional de neuronas identificables genéticamente. Se trata de una iniciativa conjunta para armar un equipo de fácil uso y mantenimiento. Detallando su forma de instalación, calibración y funcionamiento."
Uncertainty relation for the optimization of optical-fiber transmission systems simulations
(2005) Tolisano, T.; Callegari, Fulvio A.; Grosz, Diego; Fragnito, Hugo L.; Rieznik, Andrés
“The mathematical inequality which in quantum mechanics gives rise to the uncertainty principle between two non commuting operators is used to develop a spatial step-size selection algorithm for the Split-Step Fourier Method (SSFM) for solving Generalized Non-Linear Schrödinger Equations (G-NLSEs). Numerical experiments are performed to analyze the efficiency of the method in modeling optical-fiber communications systems, showing its advantages relative to other algorithms.”

Examinando por Materia "FIBRAS OPTICAS"

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