I.T. Lima

Publications (3)2.28 Total impact

• Source

  Available from: Val Marinov

  Article: Volumetric Display Based on Two-Photon Absorption in Quantum Dot Dispersions

  I.T. Lima, V.R. Marinov
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  ABSTRACT: A volumetric display technology based on two-photon absorption in quantum dots was investigated. We derive and validate a closed form expression for the luminance produced by dispersed quantum dots at the focal point of an infrared pulsed laser beam and we demonstrate using theory and experiments that voxels can be efficiently produced with commercially available solid-state pulsed lasers in off-the-shelf core-shell CdSe-ZnS quantum dots dispersed in toluene.
  Journal of Display Technology 01/2010; 6(6):221-228. · 2.28 Impact Factor
• Source

  Available from: eventoscientificos.com

  Conference Proceeding: Electrical mitigation techniques for polarization mode dispersion in optical fiber systems

  A.M. Oliveira, I.T. Lima
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  ABSTRACT: Electronic equalization for the mitigation of the impairments due to nonlinear and linear effects in optical fiber communication systems, including polarization mode dispersion (PMD), has become commonly used in optical fiber systems. The receiver-side equalizers applied to PMD mitigation are typically based on minimum mean-square error (MMSE) criterion and have been implemented with feedforward (FFE) and decision feedback (DFE) structures. In this paper, we use Monte Carlo method with multiple importance sampling to accurately evaluate and compare the performance of MMSE equalizers in the first-and second-order PMD plane for a realistic system dominated by ASE noise. We also discuss properties and implementation issues of the MMSE equalizers when implemented for PMD mitigation.
  Microwave and Optoelectronics Conference (IMOC), 2009 SBMO/IEEE MTT-S International; 12/2009
• Source

  Available from: eventoscientificos.com

  Conference Proceeding: Receiver optimization for 40 Gbit/s optical fiber systems with polarization mode dispersion

  I.T. Lima, A.M. Oliveira
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  ABSTRACT: We show that the performance of on-off-keyed 40 Gbit/s optical fiber systems whose optical and electrical receiver filter bandwidths are optimized for polarization-mode dispersion is equivalent to the performance of the same systems in which the receiver filters are optimized for operation in the absence of PMD. We also observed an increase in the sensitivity of the performance with respect to variations in the receiver filter bandwidths in the return-to-zero format in systems with PMD when compared with PMD-free operation.
  Microwave and Optoelectronics Conference (IMOC), 2009 SBMO/IEEE MTT-S International; 12/2009