Zobrazeno 1 - 10
of 55
pro vyhledávání: '"Fouad El-Diasty"'
Publikováno v:
Optical and Quantum Electronics. 53
In pursuit of manufacturing glass having a high refractive index and low dispersion, a series of lead and borate glasses containing germanium and chromium oxide by composition 25B2O3-73.8PbO-xGeO2-(1.2-x)Cr2O3, with 0 ≤ x ≤ 1.2 mol.%, are prepare
Autor:
Manal Abdel-Baki, Fouad El-Diasty
Publikováno v:
Journal of Optics. 46:83-90
A series of oxyfluoro aluminium-borate base glass used in upconversion laser and fiber devices is prepared by the conventional melt-quenching technique. Due to the ionic-covalent property of Li+ ion, the optical properties of the glasses are studied
Autor:
Manal Abdel-Baki, Fouad El-Diasty
Publikováno v:
Optical Review. 23:284-289
Reducing the glass phonon energy is an essential procedure to achieve high efficient radiative upconversion process. The degree of covalence of chemical bonds is responsible for the high oscillator strength of intracenter transitions in rare-earth io
Autor:
Fouad El-Diasty, Fathy Abdel-Wahab
Publikováno v:
Materials Science and Engineering: C. 55:524-529
The optoelectronics study of large molecules, particularly π-stacking molecules, such as DNA is really an extremely difficult task. We perform first electronic structure calculations on the heterocyclic bases of 2'-deoxyribonucleic acid based on Lor
Publikováno v:
Journal of Alloys and Compounds. 605:157-163
Optoelectronic properties of glasses can be engineered by understanding the electronic structure and the symmetry of electronic states across the band gap where the chemical bonding is the origin of such electronic structure. Thus, series of heavy me
Publikováno v:
Optics & Laser Technology. 53:51-57
Intermodal and intramodal dispersions signify one of the problems in graded-index multi-mode optical fibers (GRIN) used for LAN communication systems and for sensing applications. A central index dip (depression) in the profile of core refractive-ind
Publikováno v:
Optical and Quantum Electronics. 48
A series of new oxyfluoro aluminum-borate glasses can be used as upconversion host glass is prepared by the conventional melt-quenching technique. The effect of replacement lithium partner elements on the optoelectronic properties of the prepared gla
Autor:
Fouad El-Diasty
Publikováno v:
Advances in Life Sciences. 1:30-39
According to a mechanistic and naturalistic view of the origin of life, the reality is evolution — a single process of self-transformation started from a primordial chaotic or random state of matter reaching to modifications through natural selecti
Publikováno v:
Journal of Alloys and Compounds. 513:172-179
Thermal kinetic parameters of Cr2O3 doped lithium-aluminum-silicate (LAS) photonic glass are calculated using differential thermal analysis (DTA). The dependence of kinetic parameters together with the glass forming ability of the investigated glass
Publikováno v:
MAPAN. 26:295-302
A heterodyne laser system is constructed to study the effect of external transverse magnetic field on the dynamic instability of internal mirror TEM00q He-Ne lasers having temperature instability. The system could provide precise detailed knowledge a