Measurements and modeling of multipath interference at wavelengths below cable cut-off in a G.654 optical fiber span.

Transmission below the cable cut-off wavelength may be a concern in some systems, especially for an optical supervisory channel (OSC) operating below the signal transmission band in systems built with G.654 fiber. In this work, we constructed a cabled span of G.

Design of universal fiber with demonstration of full system reaches over 100G SR4, 40G sWDM, and 100G CWDM4 transceivers.

Universal fiber has an LP mode field diameter approximately matched to that of standard single mode fiber, while being a multimode fiber. We analyzed the dependence of the mode field diameter on the core diameter for different core delta values. Guided by the analysis, a universal fiber having a delta of 1.

[Effect of cysteine lithium salt on lipid peroxidation in the model of dopaminergic system disorder].

The antioxidant activity of a newly synthesized compound, cysteine lithium salt, was discovered using methyl oleate oxidation model of dopaminergic system disorder. Experimental data show that injection of the synthesized compound in animals with experimentally induced L-DOPA brings to normalization effect conditioned by inhibiting free radical reactions in the nuclear and mitochondrial fractions of brain cells. Antioxidant effect of the synthesized compound is related to its chemical structure that contains cysteine--an agent involved in the biosynthesis of glutathione, which is a component of glutathione peroxidase and glutathione reductase enzymes participating in the antiradical protection system.

[Neutral and acid glycolipids in the brain in the presence of ischemia and during antioxidant treatment].

The content of lipid peroxidation products and the metabolism of gangliosides and galactosylceramides in brain tissue were studied in the presence of ischemia and when an agent containing nicotinic acid and cysteine is administered. The above agent was found to have an antioxidative effect that was evident in the lower levels of lipid peroxides and in the normalized qualitative and quantitative content of galactosylceramides and gangliosides.

Plasmonic nano-structures for optical data storage.

We propose a method of optical data storage that exploits the small dimensions of metallic nano-particles and/or nano-structures to achieve high storage densities. The resonant behavior of these particles (both individually and in small clusters) in the presence of ultraviolet, visible, and near-infrared light may be used to retrieve pre-recorded information by far-field spectroscopic optical detection. In plasmonic data storage, a very short (approximately few femtoseconds) laser pulse is focused to a diffraction-limited spot over a small region of an optical disk containing metallic nano-structures.