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All Journal TELKOMNIKA (Telecommunication Computing Electronics and Control) Journal of Engineering and Technological Sciences JURNAL Al-AZHAR INDONESIA SERI SAINS DAN TEKNOLOGI Prosiding Seminar Nasional Pemberdayaan Masyarakat (SENDAMAS) Journal of Engineering and Technological Sciences
Ahmad Husin Lubis
Universitas Al Azhar Indonesia
Aerospace Engineering Humanities Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Education Electrical & Electronics Engineering Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Public Health

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Cladding effects on silica directional couplers Ary Syahriar; Ahmad Husin Lubis; Jusman Syafii Jamal; Anwar Mujadin; Ahmad Juang Pratama
TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 17, No 3: June 2019
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/telkomnika.v17i3.8705

Abstract

Directional couplers are widely used as passive and active optical devices in fibre and integrated optics, and form the basis of components such as switches, modulators and wavelength filters. They consist of two closely-spaced parallel waveguides, whose separation is sufficiently small that power may be transferred between the modes propagating in the two guides through an interaction involving their evanescent fields. In this paper results are presented for a range of near infrared single mode silica directional couplers fabricated by electron beam irradiation. The effects of over cladding layers will be highlighted. Changes on coupling coefficient due to different cladding refractive indexes will also be examined. The coupled mode theory will be employed to fit the experimental results with prediction by theory. It is found that over cladding layer alters the transmission characteristics of silica directional couplers.
Comparison of semiconductor lasers at wavelength 980 nm & 1480 nm using InGaAs for EDFA pumping scheme Satyo Pradana; Ary Syahriar; Sasono Rahardjo; Ahmad H. Lubis
TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 17, No 5: October 2019
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/telkomnika.v17i5.11745

Abstract

Long distance Optical Communications are affected by many problems; loss of signal is one of them. Erbium Doped Fiber Amplifier (EDFA) is the key to solve it. By using Semiconductor Laser as pumping source for EDFA, the signal can brought back the performed of EDFA into normal condition. EDFA has a good wavelength operation at 980nm & 1480nm, in that case Semiconductor Laser using InGaAs at 980nm & 1480nm is suitable for them. By using selected wavelength and materials, the Semiconductor Laser can be produced properly. Also, determining the parameter is the important things to construct the Laser. By using Rate Equation, the performed of Semiconductor Laser can obtained several result. Those are injection current as a function of voltage, carrier density, photon density and output power as a function of injection current.
The Method of Lines Analysis of TE Mode Propagation in Silica based Optical Directional Couplers Ary - Syahriar; Putri Wulandari; Ahmad Husin Lubis; Retno Wigajatri; Danny M. Gandana; Anwar Mujadin
Journal of Engineering and Technological Sciences Vol. 53 No. 3 (2021)
Publisher : Institute for Research and Community Services, Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/j.eng.technol.sci.2021.53.3.2

Abstract

Optical directional couplers fabricated using planar light wave circuit (PLC) technology are versatile tools in integrated photonics devices. They have the advantages of small size, high consistency, ability for high volume production, and excellent possibility to be integrated with electronics circuits. Optical waveguide couplers are mainly utilized as power dividers, optical switches, and wavelength division multiplexers/de-multiplexers (WDM). A number of methods have been used to analyze directional couplers, such as coupled mode theory (CMT), the beam propagation method (BPM), the method of lines (MoL), finite-difference methods (FDM), and finite element methods (FEM). Among these numerical approaches, MoL is the simplest method to analyze mode propagation inside directional couplers because it has the advantages of very fast convergence and accurate solutions for one-dimensional structures. The objective of this study was to analyze the propagation of TE modes in optical directional couplers by using MoL. The parameters used, i.e. waveguide width, refractive index, and wavelength, were taken from the characteristics of silica-on-silicon directional couplers that were used in fabrication. MoL is considered a special finite-difference method, which discretizes a one- or two-dimensional wave equation in the transverse direction and uses an analytical solution for the propagation directions. Basically, MoL is a semi analytical numerical method with the advantages of numerical stability, computational efficiency, and calculation time reduction. Further, we explored the possibility of using directional couplers as optical switching devices.
Optimization of Hydraulic Servo Parameter for Semi-Solid Machine using Aerotech A3200 Fiqri Ibrahim Amien; Danny M Gandana; Nasril Nasril; Dwi Astharini; Ahmad Husin Lubis
JURNAL Al-AZHAR INDONESIA SERI SAINS DAN TEKNOLOGI Vol 4, No 2 (2017)
Publisher : Universitas Al Azhar Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36722/sst.v4i2.258

Abstract

Abstract – Hydraulics machines are important parts in semi solid metal forging machine, to form the workpiece by pressing. Semi-solid machine positioning movements are required to have a high accuration, to get the high accuracy of the movement system a servo hydraulic control is added ,which consist of servo valve and digital controller (Aerotech A3200). The digital control parameters (kpos, kp, ki) are used to enhanced the hydraulic movement. To get the effect of the control parameters of the plant (hydraulic servo), a mathematical approach is used for simulation in matlab. In this research, study was done by optimize kp and ki parameters of the control system. Prior to the optimization, simulation was conducted using matlab. Where the simulated testing is using the input unit (step) and frequency (bode) to predict the circumstances that occurred to the plan which is then compared with experimental results. a step response was simulated in matlab to analyze the error of the hydraulic system. Having obtained the minimum error from adjusting kp and ki in matlab, a trend graphic error was used as a guideline to adjust parameter in actual system. The last step is to implement and adjust kp/ki in actual system and measure the real position error.Based on this research, it concluded that the error before adjustment are 0.6118-1.2642 mm for autotune  parameter kp 3500000, ki 50000. The result of average error in this experiments after adjustment are 0.017-0.166 mm for parameter kp 250000, ki 10000. Keywords - Hydraulic Servo, Aerotech A3200, Step response, Bode plot, Semi-Solid Machine.
Implementasi Hand Sanitizer Otomatis Bercatu Daya Panel Surya Untuk Pencegahan Penyebaran COVID19 pada Kelompok Karang Taruna di Tangerang Selatan Samijayani, Octarina Nur; Mujadin, Anwar; Lubis, Ahmad Husin; Syahriar, Ary
Prosiding Seminar Nasional Pemberdayaan Masyarakat (SENDAMAS) Vol 1, No 1 (2022): Maret 2022
Publisher : UniversitasAl Azhar Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36722/psn.v1i1.3191

Abstract

Di masa pandemi ini, sangat diperlukan fasilitas kebersihan untuk menunjang penerapan protokol kesehatan. Di beberapa fasilitas umum, tempat dimana orang berkumpul, seperti masjid, ruang pertemuan warga, ruang olahraga dll, masih dirasa kurang adanya fasilitas kebersihan yang memadai untuk menjaga protokol kesehatan. Untuk itu, program ini bertujuan untuk meningkatkan sosialisasi 3M (memakai masker, mencuci tangan pakai, dan menjaga jarak), serta menyediakan “TOSAN” yaitu “touchless hand sanitizer” yang dapat mengeluarkan cairan pembersih secara otomatis untuk kelompok karang taruna wilayah Kebon Bawang Jakarta Utara serta Ciputat dan Rempoa, Tangerang Selatan. Untuk keberlanjutan penggunaan alat ini, alat dilengkapi catu daya mandiri menggunakan sel surya. Selain pemberian alat, juga dilakukan edukasi teknologi mengenai cara kerja alat sehingga menambah wawasan dan menumbuhkan kreasi anak-anak muda di daerah ini. Hasil evaluasi kegiatan, dengan adanya alat TOSAN, warga lebih memperhatikan protokol kesehatan, dan tertarik terhadap produk teknologi. Program ini memberikan kontribusi dalam menambah ketersediaan handsanitizer di tempat umum sehingga warga lebih mudah dan tertarik untuk menjaga kesehatan tangan, yakni masyarakat merasa perlu menjaga kebersihan tangan (74%), berkeinginan untuk mencuci tangan dan handsanitizer (69%), mendorong perilaku mencuci tangan dan handsanitizer (86%). Selain itu, Dengan adanya Solar Cell, battere pada alat tidak perlu sering diganti, sehingga memudahkan pemeliharaan oleh warga. Warga pemuda tertarik dan antusias mengikuti workshop pembuatan alat, dan diharapkan dapat meningkatkan pengetahuan dan kreatifitas dalam bidang teknologi.Kata kunci: Hand sanitizer otomatis, Sensor ultrasonic, Solar Cell.
Penerapan Teknologi Peningkatan Penggunaan Panel Surya untuk Energi Mandiri di Rumah Gemilang Indonesia Depok Astharini, Dwi; Auni, Khairul; Subakti, Subakti; Putra, Geordiano D.K.; Pranata, A.J.; Alamsyah, Rahmadina; Rahmatia, Suci; Lubis, Ahmad Husin
Prosiding Seminar Nasional Pemberdayaan Masyarakat (SENDAMAS) Vol 3, No 1 (2023): Desember 2023
Publisher : UniversitasAl Azhar Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36722/psn.v3i1.2548

Abstract

Rumah Gemilang Indonesia (RGI) adalah unit program pemberdayaan dan pusat pelatihan dalam binaan Lembaga Amil Zakat Nasional (LAZ) Al Azhar dengan format pesantren singkat. Pada kampus Depok yang merupakan kampus utama RGI, telah  dilakukan pemasangan solar panel pada 2022 untuk menghasilkan energi mandiri, namun masih terdapat permasalahan terkait perangkat penyimpanan energi dan pengaturan aliran energi ke beban dan ke penyimpanan. Pada kegiatan ini dilakukan penerapan teknologi yaitu peningkatan penggunaan solar panel di RGI Depok. Solusi yang ditawarkan adalah menyelesaikan permasalahan sistem penyimpanan daya oleh tim abdimas dengan melibatkan pihak RGI secara teknis. Langkah kegiatan meliputi pengambilan data teknis awal, penyiapan perangkat, instalasi, pemantauan, dan evaluasi. Keseluruhan pelaksanaan melibatkan mitra yaitu tutor, peserta, dan pengelola RGI. Kegiatan tahun 2023 telah meningkatkan pasokan panel surya harian dari 5.24 Kwh menjadi 16.25 Kwh, serta menambah fitur pemantauan system berbasis IoT yang meningkatkan keterlibatan mitra khususnya tim computer dan jaringan RGI.Kata kunci: Panel Surya, Energi Mandiri, Rumah Gemilang Indonesia, IoT
One-dimensional Photonic Crystal with Defects to Detect Gelatine Containing Water Ary Syahriar; Nafis Riffat Syahriar; Muhamad Giri Suada; Kun Mardiwati Rahayu; Octarina Nur samijayani; Ahmad Husin Lubis
Journal of Engineering and Technological Sciences Vol. 58 No. 5 (2026): Vol. 58 No. 5(2026): October
Publisher : Directorate for Research and Innovation, Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/j.eng.technol.sci.2026.58.5.4

Abstract

Gelatine is commonly found in food, pharmaceutical, health, and cosmetic products. However, its use has generated significant debate due to concerns about the numerous sources, particularly for religious reasons. For Muslims and Jews, gelatine derived from porcine sources must be avoided, as it is strictly prohibited by religious laws. The detection in these products is important, and this led to the design of an optical biosensor based on a one-dimensional (1D) photonic crystal (PhC) with a defect layer. The aim was to detect the distinctive characteristics of gelatine with high sensitivity. Additionally, the defect layer was placed in the center of the structure, where the gelatine solution was introduced. The designed PhC structure consisted of N layers of (ZnO/SiO₂)ᴺ/defect/(ZnO/SiO₂)ᴺ. The reflectance and transmittance characteristics of the PhC were calculated by using the transfer matrix method (TMM), performed with the MATLAB software. For simplicity, the normal incidence of light on the PhC was assumed to avoid the complexities of oblique angles. Sensor performance was evaluated by calculating sensitivity (S), quality factor (Q), figure of merit (FOM), resolution (RS), and detection limit (LOD). The biosensor achieved an average S, Q, FOM, RS, and LOD of 225.7694 nm/RIU, 2249.413, 806.3185, 0.1332, and 4.13 × 10⁻⁵, respectively. These metrics showed the simple PhC design was a highly sensitive, non-invasive detection platform for monitoring and identifying gelatine-based products that did not meet Halal and Kosher requirements. The novelty of the study centered on the application of a simple 1D PhC with a defect cavity to detect gelatine concentrations in both aqueous and oily solutions, a problem that had not been addressed in detail.
Co-Authors Ahmad Juang Pratama Alamsyah, Rahmadina Ary Syahriar Auni, Khairul Danny M Gandana Danny M. Gandana Dwi Astharini Fiqri Ibrahim Amien Jusman Syafii Jamal Kun Mardiwati Rahayu Muhamad Giri Suada Mujadin, Anwar Nafis Riffat Syahriar Nasril Nasril Pranata, A.J. Putra, Geordiano D.K. Putri Wulandari Rahmatia, Suci Retno Wigajatri Samijayani, Octarina Nur Sasono Rahardjo Satyo Pradana Subakti, Subakti