In this study, BaZr1-xCoxO3 nanoparticles, x = 0.00, 0.04, 0.06, 0.08, 0.10 and 0.20, are synthesized through co-precipitation method. Therefore, structural, optical and magnetic properties have been investigated. The cubic perovskite structure is confirmed by X-ray diffraction (XRD) and Fourier transform infrared (FTIR) spectroscopic measurements. The average crystallite size and micro strain ...

One attractive aspect of optical fibers is their enormous bandwidth compared to other media, such as radio waves and twisted-pair wires. Still, an optical fiber is not ideal; it possesses some unwanted properties. Dispersion and nonlinearity are the major limiting factors in lightwave communication. Fiber dispersion causes different spectral components of a signal to travel at different speeds....

performance of the fiber optic networks with different physical topologies such as point-to-point, bus, ring and star, with respect to requirements as bit rates, topology structure, bit. error rate (ber) and optical component characteristics including optical amplifiers, filters, sources and detectors, are analyzed and simulated. for this purpose, maximum number of supportable nodes and throug...

Donald C. Backer, James Aguirre, Judd D. Bowman, Richard Bradley, Chris L. Carilli, Steven R. Furlanetto, Lincoln J. Greenhill, Jacqueline N. Hewitt, Colin Lonsdale, Sterphen M. Ord, Aaron Parsons, & Alan Whitney 1University of California, Berkeley; [email protected]; 510-NGC-5128 2University of Pennsylvania 3California Institute of Technology 4National Radio Astronomy Observatory 5Uni...

Exactly 125 years ago G. Peano introduced the modern concept of vectors in his 1888 book "Geometric Calculus According to the Ausdehnungslehre (Theory of Extension) of H. Grassmann". Unknown to Peano, the young British mathematician W. K. Cli ord (1846-1879) in his 1878 work "Applications of Grassmann's Extensive Algebra" had already 10 years earlier perfected Grassmann's algebra to the modern ...

We first propose a multichannel optical filter with an ultra-narrow 3-dB bandwidth based on sampled Brillouin dynamic gratings (SBDGs). The multichannel optical filter is generated when an optical pulse interfaces with an optical pulse train based on an ordinary stimulated Brillouin scattering (SBS) process in a birefringent optical fiber. Multichannel optical filter based on SBDG is generated ...

Performance of optical interconnects using volume holographic gratings and substrate-guided waves is subject to source wavelength detuning which originates from laser chirping and operating temperature changes. In this letter, we characterize and measure the dispersion of commonly used surface-normal volume holographic gratings. Dispersion characteristics of a 20 mm thick photopolymer volume ho...

The application of optical rot,atory dispersion to nucleic acids and polynucleotides is fairly recent (l-6). Doty et cd. (2) made a comprehensive study of the optical rotatory dispersion of deoxyribonucleic acid, ribonucleic acid, and complexes of some homopolynucleotides; their results strongly suggested a close relationship between the optical rotations and the secondary structure of nucleic ...

This paper advances a growing body of mobile mapping work which captures building scale tornado damage in order to reveal vulnerabilities, or protections, within an otherwise apparently homogenous damage path. The hope is to find how micro geography, or built environment structure patterning might lead to policy advances with regards to rebuilding of critical infrastructure in tornado prone are...

Cli ord Lau [email protected] Jim Burr [email protected] Pat Shoemaker [email protected] Alice Chiang [email protected] Tony Montalvo [email protected] Shaolin Li [email protected] Nathan Zeldes [email protected] Torsten Lehmann torsten@ei el.ei.dth.dk Michael Chuang [email protected] Hans Peter Graf [email protected] Andreas Andreou [email protected]...