Ahmad Marzuki

• PhD
• Sebelas Maret University

Boro-tellurite glasses composed of 57B 2 O 3 – (4-y)Na 2 O-–15Bi 2 O 3 -20TeO 2 –3TiO 2 –1Tm 2 O 3 -yHo 2 O 3 (y = 0, 0.5, 1.0, 1.5, 2.0, and 2.5 mol%) were succesfully synthesised and the change in their absorption spectra in wavelength range 300-1100 nm were studied. All glasses were fabricated at the same melting temperature 1000°C and subsequen...

Bismuth-lead glasses incorporated with different concentrations of P 2 O 5 have been synthesized. The composition of the glasses is 53Bi 2 O 3 -28PbO-(19-x)B 2 O 3 -xP 2 O 5 (BPBP) (x = 0, 0.25, 0.5, 0.75, 1.0, 1.25, and 1.5 mol%). All glasses were melted at 900°C for 40 minutes and subsequently annealed at 275°C for 8 hours and then cooled to room...

A series of boro-tellurite glasses having chemical compositions: 50B2O3 - 35TeO2 - 10Bi2O3 - (4.5-x)Na2O - 0.4Nd2O3 - xYb2O3 where x = 0.1, 0.2, 0.3, 0.4, and 0.5 mol% were fabricated and characterized in order to study the effect of Nd/Yb substitution in boro-tellurite glass in absorption spectra. These glasses have been completely fabricated by a...

The more applications involving gamma radiation, the more protection and prevention are needed to avoid its negative impact. Glass as gamma radiation shielding is widely developed. In this study, tellurite glasses were prepared using composition 70TeO2 - (15-x)ZnO - 10Bi2O3 - 3Na2CO3 - 2Ho2O3 - x Nd2O3 (with x = 0, 1, 2, 3 mol%). These glasses were...

Five boro-tellurite glasses with chemical formula 55TeO2-(12-x)B2O3-32ZnO-(1+x)Na2O (TZBN), (x= 0; 1; 2; 3; 4; mole%) were successfully synthesized by conventional melt-quenching technique. The physical properties of the glass was studied to understand effect of partial substitution between B2O3 and Na2O. The density was measured using pycnometer b...

Tm2O3 doped tellurite-zinc-bismuth-sodium (TZBN) glass samples with varying compositions were prepared through melt quenching technique. The composition of these glass was 60 TeO2 - (30-x) ZnO - 5 Bi2O3 - 5 Na2O - x Tm2O3 with (x = 0.5; 1.0; 1.5; 2.0 and 2.5 mol%). We reported the result of a systematic study of the thermal properties of these glas...

Glass with composition of 60TeO2−(30-x)ZnO–10PbO–xTiO2 (x = 0, 1, 2, 3, and 4 mol%) has been fabricated using melt quenching method at 900oC for 35 minutes. The glasses were characterized for gamma shielding properties using Phy-X PSD Lab software to obtain the Mass Attenuation Coefficient (MAC), Linear Attenuation Coefficient (LAC), Half Value Lay...

A series of tellurite glass having compositions: 60 TeO 2 – (30-x) B 2 O 3 – 7 TiO 2 – (3+x) ZnO where x = 0, 1, 2, 3, 4, and 5 mol% were successfully facbricated, i.e., by applying the melt-quenching method. Melting was carried out at 950˚C in 70 minutes. The density of all the investigated glasses were calculated using an empirical equation. The...

New tellurite glasses having compositions: 60TeO 2 -(35-x)ZnO-3Bi 2 O 3 -2Na 2 O-x PbO and 55TeO 2 -(41-x)ZnO-2Bi 2 O 3 -2Na 2 O-x PbO where x = 0 and 0.5 mol% were fabricated and characterised in order to study the effect of substitution of PbO by ZnO. Density measurement was carried out by applying Archimides principle, that is by using pycnomete...

The Nd2O3 doped lead borate glass (BPZN: Nd) with composition 45B2O3-(40-x)PbO-11ZnO-4Na2O-xNd2O3 (x=0; 0.5; 1.0; 1.5; 2.0; 2.5) mol% were fabricated using melt quenching method at 950oC for 35 minutes. The characterization of physical properties on lead borate glasses doped with Nd2O3 was measured from their density (ρ) based on the Archimedes pri...

TZPB glasses with the composition 55TeO2-(41-x)ZnO-2Bi2O3-2PbO-xNa2O (x= 2; 2.5; 3; 3.5 mol%) have been fabricated and characterized to determine the physical properties and gamma radiation shielding parameters. The method of glass fabrication is melt quenching with the holding temperature at 900˚C for 30 minutes and the annealing temperature at 25...

The aim of this paper is to review the optical properties of tellurite glasses doped by erbium and describe their bibliometric study about it. The research documents on of optical properties of tellurite glasses doped by erbium in the Scopus database are 115, start from 1999 until now. The visualization of the research assisted by VOSviewer softwar...

Wall Cracks in a slope area with high landslide risk is very common. Triggered by small horizontal land movement, relative movement of walls separated by the crack line to create wider crack can occur. In the present work, an early warning system for landslide utilizing such movement is presented. For this purpose, a bar is connected to the displac...

p>This paper presents a comparison study of absorption spectra of borotellurite glasses with compostion: 20TeO₂ – 15Bi₂O₃ – 3TiO₂ – (4-x) Na₂CO₃ – 1Tm₂O₃ - xHo₂O₃ where x = 0; 0.5; 1; 1.5; 2; 2.5 (mol%). All glasses are fabricated using mel...

Borotellurite glasses with composition (in mol%): 57B 2 O 3 –20TeO 2 –15Bi 2 O 3 –3TiO 2 –(4-x)Na 2 O–1Tm 2 O 3 -xHo 2 O 3 (where x = 0, 0.5, 1.0, 1.5, 2.0, and 2.5) have been fabricated and characterized aims at studying their density, molar volume and refractive index. Glasses were fabricated by melt quenching method. Density measurements were ca...

Borate glasses with composition 50B 2 O 3 – (25-x) Bi 2 O 3 – 25ZnO – xTiO 2 where x = 0, 1, 2, 3, 4 (mol%) were succesfully fabricated using a convensional melt-quenching technique aimed at tailoring glass suitable for a low loss optical fiber fundament. For this purpose, glasses were characterized for their density, refractive index, reflectance,...

Er ³ +-doped tellurite glasses with chemical compositions (in mol%): 55TeO2-35ZnO-(5+x)PbO-2Bi2O3-(2-x)Na2O-Er2O3 with x = 0; 0.5; 1.0; 1.5 and 2.0) were synthesized and explored their physical and optical properties. Density and refractive index were measured at room temperature and other physical properties such as ionic packing ratio, field stre...

This paper aims to analyse the research trend of erbium-doped tellurite glasses. To this aim, this paper applied bibliometric analysis. The comprehensive research document on the topic of erbium-doped tellurite glasses in the Scopus database is 695 documents. The result revealed that scientific publication on erbium-doped tellurite glasses has been...

Modal characterization carried out reported in this paper was aimed determining the refractive index and thickness profile of Ag ⁺ /Na ⁺ Ion Exchanged planar waveguides formed in Soda Lime Glass. Modal characterization was carried out using prism coupling technique and applied to all waveguides fabricated at temperature of 240 °C, 260 °C and 280 °C...

Glasses with composition (in mol%): 60TeO 2 -(30-x)ZnO-10PbO-xTiO 2 (TZPb:Ti) (where x = 0, 1, 2, 3 and 4) have been fabricated and characterised in order to study their physical and optical properties. Density and refractive index of glasses were measured at room temperature by applying Archimedes’s principle and Brewster’s angle method, respectiv...

Two series of tellurite glasses with molar compositions of (55TeO 2 –2Bi 2 O 3 –(41-x) ZnO–2Na 2 O–xNd 2 O 3 (x = 0.5, 1.0, 1.5, 2.0 and 2.5) and 55TeO 2 –2Bi 2 O 3 –(41-x) ZnO- x Na 2 O-2Nd 2 O 3 (x = 1.0, 2.0, 3.0, 4.0, 5.0) were fabricated using melt quenching technique. Based on the measured densities, refractive indices and absorption spectra,...

Boro-tellurite glasses with composition 60TeO 2 - (30-x)ZnO- 5Bi 2 O 3 - 5TiO 2 - xB 2 O 3 (where x = 0,2.5, and 5 mol%) have been successfully fabricated by melt quenching technique. FTIR characterization was carried out in range 400-4000 cm ⁻¹ using a KBr pellet method to study the glass chemical bond. The results show that several absorption pea...

New Tm ³⁺ -doped tellurite glasses were prepared by melt quenching technique. X-ray Diffraction (XRD) characterization were carried out to confirm the glassy state of the samples. Characterization using UV-VIS-NIR spectrophotometer and FTIR were performed in order to determine the width of the transparent window, optical band gap and bonding struct...

IThe risk of accidents in the railway, especially on unmanned railroad crossing, are still high. A train arrival on railroad crossing warning system is indispensable. The warning system will detect train arrival on the railroad crossing and issue a warning to the crossers. A sensor based on optical fiber Weight in Motion (WIM) is proposed. This pap...

Characterization of soda-lime has been done with aluminum doping on soda-lime glass using an electric-field-assisted solid-state ion exchange method (EFASSiE) to produce an aluminum coating on the glass. EFASSIE is an ion-exchange method that enables the doping of glass surfaces with aluminum ions. The variations used in ion exchange are temperatur...

Absorption spectra of different composition of tellurite glasses were analyzed in order to estimate their lasing properties. Composition of the investigated tellurite glasses are: 55TeO2-(43-x)ZnO-2Bi2O3-xEr2O3 (x = 0.5, 1.0, 1.5, 2.0, 2.5, 3.0 mol%). Glasses absorption spectra and density were measured at room temperature using UV-VIS-NIR Spectrop...

Tellurite glasses with molar compositions of 55TeO 2 –2Bi 2 O 3 –[43- x ] ZnO–xPbO (in mol%) with x = 1, 2, 3, 4, 5 was fabricated by melt quenching method. Their absorption spectra ranging from ultraviolet to infrared region were measured using UV-VIS-NIR spectrophotometer and FTIR. Minimum losses of all glasses were then estimated from the inters...

A fiber optic sensor is to detect the cholesterol content in blood serum-based biosensor using plastic optical fiber that has been designed. The fiber optic sensor designed with sensing area was a fiber optic grated by 5 scratches then given bending treatment by 5 cm. The first test was by UV-Vis spectrometer with linearity of 0.96. The second test...

The objective of this study is to detect glucose content in human blood serum using optical fiber grating with LED wavelength corresponding to the absorption of glucose content in blood serum. The testing used a UV-Vis spectrometer and Rays spectrometers, in which in the ray spectrometer it was used optical fiber biosensor using optical fiber grati...

p>This study presents an overview influence of the refractive index parameter to the parameter and radiative properties of analyticaly results on Judd Ofelt tellurite based glass, in the hope of clarifying the importance of education with good refractive index measurement. The main stages carried out is the matching between the result of the parame...

Theoretical and experimental study of light propagation in acrylic triangle waveguides has been studied theoretically and experimentally aimed to obtain a light cone which can tunnel and bring the light to a certain place. Numerical aperture of light cones which have a length of 7 cm but different cross-section area have been measured using he-Ne l...

Optical fiber sandwiched pad designed as a pressure mapping sensor has been configured and characterized. Optical fiber sensor was aligned to form a web-like configuration (x- y matrix). Several fibers were positioned to form lines parallel to y-axis while others are in parallel to x-axis. When a mass with a particular surface contour was loaded on...

Research of optical fiber-based heart rate detection sensor has been conducted using the reflection configurationon the thorax motion modified. Optical fiber used in this research was Plastic Optical Fiber (POF) with a diameter of 0.5. Optical fiber system is made with two pieces of fiber, the first fiber is to serve as a transmitter transmitting l...

Tellurite glasses with compositions of 55TeO2 - (41- x) ZnO-2Bi2O3-2Na2O-xPbO where x = 1.0, 1.5, 2.0, and 2.5% mole (Pb:TZBN glasses) were prepared by melting the mixture at 900°C and quenched rapidly. IR spectra were recorded in the range 400 cm⁻¹ and 4000 cm⁻¹. Analyses were carried out to study the effect of PbO incorporation into the glasses t...

This paper presents the optical properties of erbium doped tellurite glasses with the composition of 55TeO2-2Bi2O3-35ZnO-5PbO-(3-x)Na2O-xEr2O3 where x = 0, 0.5, 1.0, 1.5, 2.0, 2.5, and 3.0 mol% . Refractive index of the glasses was measured using Brewster’s angle method and their optical absorption spectra were measured in spectral range 200 – 1100...

This paper presents the refractive index measurement of tellurite glasses using Brewster angle method. We propose a simple experimental method for finding the refractive index of tellurite glasses material using the polarization of light reflected by a dielectric surface near the Brewster angle. The refractive index of tellurite glasses with the co...

span>This paper presents an experimental result on developing an optical fiber sensor for measuring refractive index of sugar solution. Sensor was developed using polymer optical fiber with diameter of 3 mm. This sensor is working based on intensity modulation due to reflection. Light coming out from the transmitter optical fiber is reflected by a...

span>A simple method to measure a solution refractive index using fixed mirror refractive optical fiber sensor has been investigated. The solution used are sugar and salt solution, with concen tration varies from 1M to 5M. The diameter of polymer optical fiber used is 0.5 mm and light source used is LED (λ=676 nm). The sensor work based on light in...

A series of quaternary tellurite glasses of the form of 55TeO2 –2Bi2O3 –[43-x]ZnO–xPbO (TZBP) were prepared by conventional melt quenching method. The amorphous nature of the glasses has been confirmed using XRD, and their tendency against crystallization has been concluded using DSC. Optical properties of the glasses aimed to gain information on t...

Physical and optical properties of lead telluride (Pb:TZBN) glasses with composition 55TeO2-(41-x)ZnO-2Bi2O3-2Na2O-xPbO where x = 1.0, 1.5, 2.0, 2.5% mol are presented. UV-VIS-NIR spectra of the glasses in the range of 300 - 800 nm along with their densities and refractive indices at 746 nm were recorded at room temperature. The optical bandgap ene...

A reflective optical fiber sensor designed for measuring refractive index and sugar concentration of aqueous solutions is described. Two strains of parallel polymer optical fibers (POF) were wrapped in a bundle such that one of their fiber's end cross-sections had the same distance to the mirror surface. The light coming out from one strain of the...

This paper reports the optical properties of the optical planar waveguides in a soda lime glass fabricated by ion exchange. Planar waveguide fabrication was carried out by immersing the soda lime glass in molten 100 % AgNO3 bath for different duration (ranging from 15 minutes to 735 minutes) and at temperature of 280°C. The results show that the su...

This paper presents the design of a simple and cheap landslide early warning system which mainly consists of a displacement fibre sensor, mechanical displacement converter, and Short Messaging Service (SMS) gateway equipped with a siren. Displacement fibre optic sensors were made by wrapping a polymer optical fibre (POF) around a holey elastic cyli...

Peneltian ini bertujuan menganalisis spektrum Fourier Transform Infra Red (FTIR) dan menentukan minimum loss dari kaca Tellurite-Bismuth-Zinc-Plumbum (TBZP) yang dipengaruhi oleh variasi (PbO). Kaca TBZP difabrikasi dengan teknik melt quenching dengan komposisi 55TeO2–2Bi2O3–[43-x]ZnO–xPbO (%mol) dengan x=2, 3, 4, 5. Hasil uji spektrum Fourier Tran...

This paper presents the use of variable fiber optic attenuator incorporated in intensity modulated fiber sensor configuration in which light is split into two arms: modulated and reference fiber arm. In order that the initial ratio of light intensity passing through these two arms can be kept to a particular value, light intensity in either the mod...

Penelitian ini mengkaji indeks bias kaca berbasis tellurite TBZP yang dipengaruhi oleh variasi PbO. Kaca TBZP difabrikasi dengan teknik melt quenching dengan komposisi 55TeO 2-2Bi 2 O 3-[43-x]ZnO-xPbO (%mol) dengan x= 1, 2, 3, 4, 5. Reflektansi dan indeks bias kaca diukur dengan metode sudut brewster pada mode tranverse electric (TE) dan mode tranv...

This paper reports the isothermal differential scanning calorimeter (DSC) method used to study the crystallization kinetics of aluminum fluoride glass. The effective activation energy of crystallization (DeltaEa/n) was evaluated from the DSC curves using the Johnson-Mehl-Avrami equation. The value of the effective activation energy (Ea/n = 113.3 kJ...

Aluminium fluoride glasses doped with different concentrations of Pb2+ have been analyzed for their devitrification characteristics. The kinetics of devitrification, using isothermal and non-isothermal calorimetric techniques, were studied for PbF2-containing glass compositions: 99-x99(39AlF3–6MgF2–22CaF2–6SrF2–6BaF2–10LiF–8NaF–2NaPO3)–xPbF2–1NdF3,...