Justiça restaurativa: um caminho para a humanização do direito

Divulgação dos SUMÁRIOS das obras recentemente incorporadas ao acervo da Biblioteca Ministro Oscar Saraiva do STJ. Em respeito à Lei de Direitos Autorais, não disponibilizamos a obra na íntegra. STJ00093300 343.9 R628j (2012

Evidence by Mueller spectropolarimetry of optical rotation imprinted by femtosecond laser in silica

International audienc

Radiation-Response of Fiber Bragg Gratings at Low Temperatures

International audienc

Dependence of the Voids-Fiber Bragg Grating Radiation Response on Temperature, Dose, and Dose Rate

International audienceThe voids-fiber Bragg gratings (FBGs) are manufactured point by point by focalizing an infrared femtosecond laser in a small fraction of the core and creating a microscopic void. This makes these gratings very resistant and stable to high temperatures. However, until today, only very few tests under radiation have been performed on these FBGs. A complete study on the radiation response of this grating technology under X-rays is here presented, highlighting the dependence of its radiation response on dose, dose rate, irradiation temperature, and preirradiation treatment

Grating writing in structured optical fibers

Grating writing in structured optical fibers is reviewed. Various laser sources have been used including UV and near IR nanosecond and femtosecond lasers, each enabling different material processing regimes. The issue of scattering is modeled through simulation and compared with experiment. Good agreement has been established

Ge- and Al-related point defects generated by gamma irradiation in nanostructured erbium-doped optical fiber preforms

International audienceErbium-doped amplifiers (EDFAs) are of special interest for space applications.In this environment, the ionizing radiations decrease the gain of these opticalamplifiers, due to the ionization of defects precursors, mainly linked to dopantsas Germanium (Ge), Aluminum (Al), or Phosphorus (P). The aim of this work isto study the influence of the Ge and Al relative concentration on the radiationresistance of different nanostructured fiber preforms, manufactured by ModifiedChemical Vapor Deposition (MCVD), in which various types of nanoparticles(Er@SiO2-NP, Al2O3-NP, and Er@Al2O3-NP) have been introduced in thesilica matrix. The radiation resistance of these fibers has been compared withthat of standard MCVD Er-doped preforms. All of them have been characterizedby optical absorption and Electronic Paramagnetic Resonance (EPR) spectroscopiesbefore and after irradiation with a total gamma dose of 5.9 kGy. EPRresults show that Al-related defects are not observed in fiber preforms with Geconcentrations higher than 4.4 wt%. We also demonstrated that NP technologycan limit the formation of Aluminum-Oxygen Hole Centers (AlOHCs), reducingthe Radiation-Induced Attenuation at the energy of interest for EDFAs