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Using Different Techniques in Data Transferring by Optisystem Program
Malik A. Jabbar,
Baraa M. Albaker,
S. M. Zafar Iqbal
Issue:
Volume 5, Issue 6, December 2017
Pages:
59-66
Received:
5 February 2017
Accepted:
27 February 2017
Published:
19 December 2017
Abstract: Nowadays, signal communication is considered as a vital element of our modern daily life. This is due to the need for transmitting large amount of different data types such as text, voice, images, videos, etc. The increase in the volume of data communications requires large data transmission capacity. The data can be transmitted using copper wire, but with low data transmission capacity. To resolve this issue of transmitting large data with a higher signal to noise ratio and larger communication distant, lightwave technology was adopted. The work focuses on the design and the modeling of single and dual channels optical communication systems that use lightwaves as a carrier for signal transmission. This is to study characteristics and conduct performance evaluation and analysis of the designed communication subsystems through the use of different data transmission and reception techniques. Optisystem simulation software is used as a powerful simulation tool in the development of optical system modules, which include the transmitter that converts signal to light, fiber-optic channel, and the receiver that converts light back to the original signal.
Abstract: Nowadays, signal communication is considered as a vital element of our modern daily life. This is due to the need for transmitting large amount of different data types such as text, voice, images, videos, etc. The increase in the volume of data communications requires large data transmission capacity. The data can be transmitted using copper wire, ...
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Optical Response of Coated Iron Oxide (s) Nanoparticles Towards Biomedical Applications
Pradeep Bhatia,
Suram Singh Verma,
Murari Mohan Sinha
Issue:
Volume 5, Issue 6, December 2017
Pages:
67-72
Received:
21 October 2017
Accepted:
17 November 2017
Published:
20 December 2017
Abstract: We studied the optical properties of coated iron and its oxide (s) nanoparticles as core and silver/gold as shell materials because of their fascinating properties in tissue engineering, cancer therapy, and information storage. The maximum absorption peaks for Fe, FeO, Fe2O3 and Fe3O4 are found at 421 nm, 1500 nm. 1169 nm and 1100 nm with Ag coating, and 530 nm, 1507 nm, 1115 nm and 1200 nm with Au coating. Furthermore, the larger absorption efficiency has been found at 16 nm Ag/Au shell thickness of all considered core-shell nanostructures and especially absorption efficiency gradually increases for entire considered Au shell thickness. The largest LSPR is found for Fe2O3-core with Ag and Au-shell. It is found that the absorption LSPR spectra which are almost fixed for coated iron and varied for coated iron oxides, shows the tunability in the visible and NIR region respectively with increasing shell thickness. The LSPR peaks in visible and NIR region of electromagnetic spectrum opens the door to photonic-magnetic nanodevices, and therapeutic applications.
Abstract: We studied the optical properties of coated iron and its oxide (s) nanoparticles as core and silver/gold as shell materials because of their fascinating properties in tissue engineering, cancer therapy, and information storage. The maximum absorption peaks for Fe, FeO, Fe2O3 and Fe3O4 are found at 421 nm, 1500 nm. 1169 nm and 1100 nm with Ag coatin...
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High Speed VCSEL Transmission at 1310 nm and 1550 nm Transmission Wavelengths
Henry Chepkoiwo Cherutoi,
George Mosoti Isoe
Issue:
Volume 5, Issue 6, December 2017
Pages:
73-79
Received:
14 November 2017
Accepted:
30 November 2017
Published:
2 January 2018
Abstract: Vertical cavity surface emitting lasers (VCSELs) operating at 1310 nm and 1550 nm are very promising sources for access and interconnections in telecommunication systems due to their technologically attractive properties such as low threshold currents and narrow spectral linewidth due to single mode operation. VCSELs are also being rapidly commercialized for single-mode fibre metropolitan area and wide area network applications. All these advantages leads to cost-effective wavelength-tunable lasers, which are essential for the future intelligent, all-optical networks. Direct modulation (DM) of VCSEL with separate optical and current apertures enables high modulation bandwidth operating at single mode at low current density. However, dispersion and attenuation is a major hurdle to VCSELs transmission at bit rate of 10 Gb/s and above. In this study, a 1310 and 1550 nm VCSELs were directly modulated with 10 Gb/s NRZ PRBS 27-1 and transmitted over 25 km ITU. T G.652 and ITU. T G.655 fibres and optimized for metro-access distances. A low dispersion penalty was realized when a 1550 nm VCSEL was used on a G.655 fibre and when a 1310 nm source was transmitted over a G.652 fibre. The transmission system has been analyzed on the basis of different parameters, which are (Bit error rate) BER, Quality (Q) factor and Output power.
Abstract: Vertical cavity surface emitting lasers (VCSELs) operating at 1310 nm and 1550 nm are very promising sources for access and interconnections in telecommunication systems due to their technologically attractive properties such as low threshold currents and narrow spectral linewidth due to single mode operation. VCSELs are also being rapidly commerci...
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Mechanism of Interaction Between Cefonicid Sodium and Trypsin by Spectroscopic and Molecular Docking Methods
Jinju Wang,
Baosheng Liu,
Shaotong Duan,
Tongtong Li
Issue:
Volume 5, Issue 6, December 2017
Pages:
80-87
Received:
10 January 2017
Accepted:
31 January 2017
Published:
12 January 2018
Abstract: The binding of cefonicid sodium (CFS) with trypsin was investigated by spectroscopic and molecular docking methods under different temperatures conditions (303, 310 and 318 K). The results demonstrated that the interaction between CFS and trypsin was taking place via static quenching with 1:1 binding ratio. The fluorescence datas were treated by using the double logarithmic equation, and the binding constants Ka of the interaction of CFS-trypsin systems and the number of binding sites n were obtained. The thermodynamic parameters of CFS-trypsin systems under different temperatures were obtained by the thermodynamic equation. The experimental data show that the interactions between them were mainly hydrophobic interaction and hydrogen bonding interaction, and with the molecular docking results are consistent.
Abstract: The binding of cefonicid sodium (CFS) with trypsin was investigated by spectroscopic and molecular docking methods under different temperatures conditions (303, 310 and 318 K). The results demonstrated that the interaction between CFS and trypsin was taking place via static quenching with 1:1 binding ratio. The fluorescence datas were treated by us...
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