Sedky, A Afify, Naser Hakamy, A Abd-Elnaiem, Alaa M
Published in
Physica Scripta
The structural and optical properties, as well as dielectric characteristics at various frequencies (0.1 Hz—20 MHz) and temperatures, T (300–400 K), of hydrothermally synthesized SnO2 nanoparticles, Cu/SnO2, and Fe/SnO2 composites have been investigated. The crystal structure is mostly formed of a tetragonal SnO2 phase, with a second phase of monoc...
Jalal, Sirwan Kareem Al-Maqdici, Raghad Zuhair Yousif
Published in
Engineering Research Express
Passive Optical Network (PON) is a promising 5 G optical fiber network technology, that can enhance reliability data rate, and bandwidth saving. This simulation-based study investigates the feasibility of implementing a vertical cavity-surface emitting laser (VCSEL) optical source along with wavelength-division multiplexing (WDM) for designing a PO...
Xie, Suxia Sun, Siyi Li, Zhijian Yang, Jingcheng Shen, Weiwei Guan, Xin
Published in
Journal of Physics D: Applied Physics
All-dielectric metasurface with ultra-high quality resonances underpinned by bound states in the continuum (BICs) have attracted lots of attention in recent years for they enable new methods of wavefront control and light focusing. We study a metasurface composed of one transverse nanohole (TNs) and two identical vertical nanoholes (VNs) in one lat...
Ferrero, Fabien Jonsson, B.L.G.
Circular polarization is an essential feature for small antennas designed to connect with satellite navigation systems. Here, a Q-factor optimization problem constrained with a circular polarization radiation requirement is formulated and solved. The constrained problem is shown to be solvable as fast as calculating the Q-factor bound without the c...
giggenbach, dirk
Data receiving frontends using avalanche photodiodes are used in optical free-space communications for their effective sensitivity, large detection area, and uncomplex operation. Precise control of the high voltage necessary to trigger the avalanche effect inside the photodiode depends on the semiconductor’s excess noise factor, temperature, receiv...
Dhadhal, Dharmendra Mishra, Vivekanand Thummar, Ruturaj
Published in
Journal of Physics Communications
This work is proposed to examine modified duobinary return to zero modulation in DWDM long haul communication system. In this framework we simulate 32 channels each channel data rate is 40 Gbps multiplexed with the channel spacing 80 GHz, 90 GHz and 100 GHz to perceive 1.2 Tbps data. This data completed transmission Distance over 250 KM by utilizin...
Bhogal, Rosepreet Kaur Sindhwani, Manoj
Published in
Journal of Physics: Conference Series
A novel cost-effective wavelength shifter is suggested in this paper. This paper shows how to shift signals in the mm-wave area using a frequency shifter. Due to stimulated Brillouin scattering in optical fibre, the proposed approach produces a single sideband signal without the carrier signal. When compared to SSB-SC transmissions, the bandwidth e...
zeng;, desheng
A reflowing photoresist and oxidation smoothing process is used to fabricate ultra-high-Q silicon microring resonators based on multimode rib waveguides. Over a wide range of wavelengths near 1550 nm, the average Q-factor of a ring with 1.2-μm-wide waveguides reaches up to 1.17 × 106, with a waveguide loss of approximately 0.28 dB/cm. For a resonat...
sinusia, miguel
The massive data transfer rates of nowadays mobile communication technologies demand devices not only with outstanding electric performances but with example stability in a wide range of conditions. Surface acoustic wave (SAW) devices provide a high Q-factor and properties inherent to the employed materials: thermal and chemical stability or low pr...
Boukricha, Sokaina Bouzidi, Afaf Ghoumid, Kamal Ar-Reyouchi, El Yahiaoui, Réda Elmazria, Omar
In this paper, we examine the performance of a spectral amplitude coding-optical code division multiple access (SAC-OCDMA) system using two different codes: m-sequence and Hadamard. Fiber Bragg grating (FBG) filters and balanced detection technique are employed for performance enhancement. The system performance is evaluated in terms of quality fac...
