Browsing Journal Articles by Title
Now showing items 2073-2092 of 3156
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Optical constact of the poly vinyl alcohol grafted Rhodamine B (PVA-g-Rh B)
(Universiti Malaysia Perlis, 2014)The optical constants of the prepared PVA-g-Rh B thin films have been studied. The real and imaginary part of the complex refractive index and dielectric constant of the copolymer were determined. The optical conductivity ... -
Optical domain service differentiation using spectral-amplitude-coding
(Elsevier Inc., 2009)We have implemented a new service differentiation technique in the optical domain using a spectral-amplitude-coding (SAC) variant of optical code division multiple access (OCDMA). The newly developed code, named KS ... -
Optical fibre sensor using frequency beating technique
(Universiti Malaysia Perlis (UniMAP), 2020-04)In this paper, a new method to realize the optical fibre sensor using an optical heterodyne technique (OHT) is proposed and numerically demonstrated. In this method, the bandpass filter (BPF) was utilized as a reference ... -
Optical Gain and Confinement in Gaas/Algaas Structure Quantum Well Lasers
(Universiti Malaysia Perlis (UniMAP), 2018-01)In this paper we investigate the optical gain seen by the polarization modes for each of Transverse Electric (TE) and Transverse Magnetic(TM) of GaAs/Al0.32Ga0.68As quantumwell lasers. The factor confinement and modal ... -
Optical Generation of 80 GHz Downstream Data in Radio over Fiber System Based on Stimulated Brillouin Scattering
(EDP Sciences, 2017)In this work, we proposed Stimulated Brillouin Scattering (SBS) in an optical generation of millimeter waves (mm-waves) for radio over fiber (RoF) system with the transmission of 2.5 Gbps data rate. SBS method is achieved ... -
Optical investigations of GaN deposited nano films using pulsed laser ablation in ethanol
(Universiti Malaysia Perlis (UniMAP), 2022-04)We provide an optical study on GaN thin film testing created by pulsed laser (ablation) in liquid. This study applied six different energies for ablated GaN nanoparticles in the liquid. According to the XRD test, the ... -
Optical investigations using ultra-soft pseudopotential calculations of Si0.5Ge0.5 alloy
(Elsevier Ltd, 2008-12)Ultra-soft pseudopotential (US-PP) calculations with a powerful package called VASP (Vienna ab initio simulation package) are used. The total density of state and the energy gap of Si0.5Ge0.5 alloy of zinc-blende structure ... -
Optical modulator with ZnO bulk single crystals
(Universiti Malaysia Perlis (UniMAP), 2017)An optical modulator was fabricated with semiconductor ZnO by associating a nematic liquid crystal layer with indium–tin oxide. This device revealed the height variation in the phase and refractive index of irradiation ... -
Optical properties of GaN nanostructures for optoelectronic applications
(Elsevier B.V., 2013)Electrochemical deposition method is used to prepare GaN nanostructure. The morphological studies using scanning electron microscopy (SEM), photoluminescence (PL) the refractive index and optical dielectric constant are ... -
Optical properties of manganese chiral single ring by glancing angle deposition technique
(Universiti Malaysia Perlis (UniMAP), 2017)Embracing physical vapor deposition system, GLAD method defines the deposition angle, α, in terms of vapor flux and normal substrate. The substrate rotation angle, φ, defines the azimuthal substrate position relative to ... -
Optical properties of Poly Vinyl Alcohol (PVA)/molasses as biodegradable films for agriculture applications
(Universiti Malaysia Perlis (UniMAP), 2021-10)Biodegradable polymeric films were prepared for agricultural applications. These films based on PVA/ molasses blend mixed with different concentrations (0, 10, 20, 30 and 40 wt. %). These films were characterized by FTIR ... -
Optical properties of Si quantum dot potential under pressure effect
(Trans Tech Publications, Switzerland., 2012)Further study of the quantum dot potential under hydrostatic pressure for Si is presented. This potential has been calculated by means of our recent empirical model. The indirect energy gap (Γ-X) is calculated using the ... -
Optical properties of ultraphosphate glasses containing mixed divalent zinc and magnesium ions
(Elsevier, 2013-01)Ternary zinc magnesium ultraphosphate glasses corresponding to (ZnO)x(MgO)30−x(P2O5)70 were prepared by melt quenching technique in the range of 5 ⩽ x ⩽ 20 mol%. The optical absorption spectra of the glasses were measured ... -
Optical properties of ultraphosphate glasses containing mixed divalent zinc and magnesium ions
(Elsevier B.V., 2013-01)Ternary zinc magnesium ultraphosphate glasses corresponding to (ZnO)x (MgO)30 x (P2O5)70 were prepared by melt quenching technique in the range of 5 6 x 6 20 mol%. The optical absorption spectra of the glasses were ... -
Optical Spectrum CDMA: a new code construction for Double Weight Code Family
(Institute of Electrical and Electronics Engineering (IEEE), 2006)This paper handles the Double Weight (DW) Code family, one of the proposed codes used in Spectral-Amplitude-Coding Optical Code Division Multiple Access (OCDMA). The DW code family is constructed using a matrix technique ... -
Optical spectrum CDMA: A new code construction with zero cross correlation for double weight code family
(Institute of Electrical and Electronics Engineering (IEEE), 2007)This paper concentrates on Double Weight code family as a proposed code for the optical spectrum code division multiple access (OSCDMA) which has one cross correlation value. By eliminating the intersection columns of this ... -
Optical tomography hardware development for solid gas measurement using mixed projection
(Elsevier Ltd, 2013-10)The ability to implement fan beam projection in parallel view in an optical tomography setup is one of the novelties of this research. This design involves a sensor jig specifically designed for parallel applications that ... -
Optical tomography system based on charge-coupled device linear image sensors: Particle size measurement
(Elsevier B.V, 2011-08)This paper discussed an optical tomography system based on charge-coupled device (CCD) linear image sensors. The developed system consists of a lighting system, a measurement section and a data acquisition system. Four CCD ... -
Optical tomography system based on charge-coupled device linear image sensors: Particle size measurement
(Elsevier B.V., 2011-08)This paper discussed an optical tomography system based on charge-coupled device (CCD) linear image sensors. The developed system consists of a lighting system, a measurement section and a data acquisition system. Four CCD ... -
An optical tomography system using a digital signal processor
(Molecular Diversity Preservation International (MDPI), 2008-03)The use of a personal computer together with a Data Acquisition System (DAQ) as the processing tool in optical tomography systems has been the norm ever since the beginning of process tomography. However, advancements in ...