RR R | University Parthenope (original) (raw)

Books by RR R

Polymer photonics is an interdisciplinary field which demands excellence both in optics (photonic... more Polymer photonics is an interdisciplinary field which demands excellence both in optics (photonics) and materials science (polymer). However, theses disciplines have developed independently, and therefore the demand for a comprehensive work featuring the fundamentals of photonic polymers is greater than ever.
This volume focuses on Polymer Optical Fiber and their applications. The first part of the book introduces typical optical fibers according to their classifications of material, propagating mode, and structure. Optical properties, the high bandwidth POF and transmission loss are discussed, followed by an outline on the propagating mode characteristics and how they affect the performances of the fiber.
The second part of the book reviews conventional materials of POFs and gives an overview on fabrication methods. This is followed by a survey of characterization methods. Based on the characteristics of optical communication systems, the last chapter will concentrate on the many advantages of POF in link and network design.
Written by a top expert in the field, this is an invaluable resource for semiconductor physicists, materials scientists, polymer chemists, electrical engineers, and those working in the semiconductor industry.

This book is a practical, step-by-step guide to getting started with Microsoft Office 2010. You’l... more This book is a practical, step-by-step guide to getting started with Microsoft Office 2010. You’ll learn how to create and edit essential office files—documents, spreadsheets, presentations, and more—quickly and efficiently.

You’ll also learn about all of the new updates included with Office 2010. Collaborate on projects in the cloud and access your files from virtually anywhere—with Beginning Microsoft Office 2010, you’ll take a hands-on approach to learning everything, new and old, that the world’s most popular productivity software suite has to offer.

This book is a MUST for everyone in and around the optics community! Fiber Optic Essentials provi... more This book is a MUST for everyone in and around the optics community! Fiber Optic Essentials provides professionals and students new to the field of fiber optics with a high-level knowledge of principles, theories and applications. This primer can also be used as a succinct overview of optics for those with some engineering and physics background.

The advent of the laser and recent advances in optoelectronics and eJectro-optics have opened u... more The advent of the laser and recent advances in
optoelectronics and eJectro-optics have opened
up the infrared and visible part of the
electromagnetic spectrum for communications
and general data-processing applications. Planar
optical waveguides such as films and strips or
strip-derived structures are needed in these
applications to form distributed components
and to connect components and subsystems.
Glass fibres serve as the transmission medium in
optical communications. This book analyses
light propagation in optical waveguides with a
view to these applications, and treats their
design and fabrication as well as their excitation
by couplers, connectors, and transitions.

It starts with plane-wave absorption,
scattering, and dispersion in the bulk of optical
waveguide materials and their total reflection
at interfaces. Film-guide modes are then derived
from a ray picture and as field solutions,
including graded-index films. Interface scat-
tering and curvature loss are analysed for film
modes, as well as their excitation by grating and
prism couplers, As planar guides with transverse
confinement, film lens guides, strips, strip-
loaded films, and rib and bulge guides are
analysed using a generalized ray concept. Their
excitation by directional couplers follows from
a general theory of coupled waveguides.

Step- and graded-index fibres are first treated
by ray optical methods which are then com-
plemented by more exact field solutions. Thus
guided and leaky mode characteristics are
obtained for multimode and single-mode
operation. The dispersion analysis takes account
of mode, material, and profile dispersion and
arrives at near optimum profiles. For imperfect
fibres, including those with micro-bending, the
solution of coupled wave and coupled power
equations and a power diffusion approximation
allow one to specify fibre tolerances for certain
signal degradations. Methods for fibre fabric-
ation and cabling are presented which produce
optical fibre cables with low loss and distortion.

Papers by RR R

plos one, 2019

Lipid droplets are lipid-storage organelles with a key role in lipid accumulation pathologies suc... more Lipid droplets are lipid-storage organelles with a key role in lipid accumulation pathologies such as diabetes, obesity and atherosclerosis. Despite their important functions many aspects of lipid droplets biology are still unknown. This is partially due to the current use of exogenous labels to monitor their formation and remodelling by invasive imaging methods. Here, we apply stimulated Raman scattering microscopy to acquire images with high spatial resolution along with resolving capabilities of lipids and proteins and three-dimensional sectioning. Our images and data analysis demonstrate an increase in the number of large (>15μm 2) lipid droplets in human adipocyte cells during differentiation process. In addition, spatially-resolved maps of lipids and proteins inside cells and three dimensional reconstructions of lipids at the initial and final steps of adipocyte differentiation are reported, too.

In this paper, we present a comparative study of long period gratings (LPGs) written in standard ... more In this paper, we present a comparative study of long period gratings (LPGs) written in standard Ge-doped fiber and in two different Fluorine-doped fibers by means of electric arc discharge (EAD) based technique. Concerning Ge-doped fibers, we present an assessment of the EAD procedure by fabricating relatively short LPGs with deep attenuation bands (up to 32 dB) and trivial power losses. We also demonstrate the ability to manage the effect of the single EAD perturbation to select grating length, which in turn acts on the bandwidth of attenuation bands, without compromising depth. Furthermore, for the first time, we produced LPGs in F-doped fibers with attenuation bands deeper than 30 dB, demonstrating the dependence of the spectra on the grating period. Finally, we illustrate a comparative experimental study on the sensitivity of LPGs fabricated in standard and F-doped fibers with surrounding refractive index (SRI) and temperature changes. We proved that SRI response of LPGs in F-doped fibers is significantly higher than in standard fiber and it strongly depends on the type of F-doped fiber considered. LPGs written in F-doped fibers exhibit a slightly lower temperature sensitivity (in range 20-30 pm/°C for λres2 cladding mode) than LPG in standard fiber (45 pm/°C).

Thesis Chapters by RR R

In this project a design carried out of Dual field of view optical system for 3-5 µm wavelength r... more In this project a design carried out of Dual field of view optical system for 3-5 µm wavelength range. The Field of view (FOV) in narrow mode is 2° whereas FOV in wide mode is 10° giving a magnification of 5X. The detector pixel size is 15 µm x 15 µm. The relative aperture of detector is 3. For making simple and practical priority has been given to use of the conventional lens materials. In order to switch FOV two different optical configurations (multi-configuration) are superimposed and both the configurations are optimized to achieve the diffraction limit of the optical system.

Talks by RR R

Laboratory Virtual Instrument Engineering Workbench is a system-design platform and development e... more Laboratory Virtual Instrument Engineering Workbench is a system-design platform and development environment for a visual programming language from National Instruments

plos one, 2019