Browsing by Author "Azad, Mir Mohammad"

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Design and Analysis of Heptagonal Cladding with Rotated-hexa Elliptical Core Based PCF for the Applications of Communication Sectors in the THZ Region
(Optical and Quantum Electronics, Springer, 2021-11-02) Hossain, Md. Selim; Barid, Mimun; Sen, Shuvo; Azad, Mir Mohammad; Haque, Md. Dulal
Photonic crystal fiber-based heptagonal cladding with the elliptical rotated-Hexa core is reported in the terahertz waveguide for the applications of communication area in this paper. By utilizing the photonic crystal fiber concept, all numerical results have been obtained by the finite element method with perfectly matched layers based on the COMSOL Multiphysics computer software tool. This H-PCF fiber shows a low effective material loss of 0.0076 cm−1, with a larger effective area of 5.95 × 10–8 m2, power flows within the core area of 90%, confinement loss of 3.35 × 10–16 cm−1, and scattering loss of 1.24 × 10–10 cm−1 at 1 THz. Besides, other optical properties like confinement loss, scattering loss, power fraction, V-parameter, and effective area have also been considered briefly. So, it is expected that the mentioned H-PCF structure-based waveguide will significantly improve many kinds of communication fields of the THz technology.
Design and Analysis of the Effect of Zeonex Based Octagonal Photonic Crystal Fiber for Different Types of Communication Applications
(Optical and Quantum Electronics, Springer, 2021) Hossain, Md. Selim; Sen, Shuvo; Kamruzzaman, M. M.; Azad, Mir Mohammad
In this present work, a novel structure of octagonal cladding with two elliptical air holes based on photonic crystal fiber (O-PCF) has been presented for the application of different types of communication areas within the terahertz (THz) wave propagation. There are five layers of octagonal design shape of circular air holes (CAH) in cladding region with elliptical design shape of two air holes in core area has been reported in this research work. This O-PCF fiber has been investigated by the perfectly matched layers (PML) with the finite element method (FEM). After the simulation process, our proposed O-PCF fiber shows a low effective material loss (EML) of 0.0162 cm −1 , the larger effective area of 5.88×10-8 m2, the core power fraction (PF) of 80%, the scattering loss of 1.22×10 -10 dB/km, and the confinement loss of 3.33×10 -14 dB/m at the controlling region of 1 terahertz (THz). Due to its excellent characteristics, this proposed O-PCF fiber gives proficient transmission of broadband terahertz waves of signals. Moreover, for different kinds of optical communication applications and biomedical signals, our suggested O-PCF fiber will be highly perfect in the terahertz (THz) regions.
Design and Numerical Analysis of Zeonex-based Photonic Crystal Fiber for Application in Different Types of Communication Networks
(Journal of Computational Electronics, Springer, 2021-05-07) Hossain, Md. Selim; Sikder, Abu Sayed; Sen, Shuvo; Azad, Mir Mohammad
A photonic crystal fiber (O-PCF) with a novel structure consisting of five octagonal-shaped layers of circular air holes in the cladding region and two elliptical air holes in the core region is presented for application in different communication fields for terahertz (THz) wave propagation. The O-PCF fiber is investigated using perfectly matched layers by applying the finite element method. Based on the results of the simulations, the proposed O-PCF fiber shows a low effective material loss of 0.0162 cm−1, a higher effective area of 5.88 × 10–8 m2, a core power fraction of 80%, a scattering loss of 1.22 × 10–10 dB/km, and a confinement loss of 3.33 × 10–14 dB/m in the target region of 1 terahertz (THz). Due to its excellent characteristics, the proposed O-PCF fiber offers excellent transmission characteristic across a broad band of the terahertz region. Moreover, the suggested O-PCF fiber will be ideal for use in the terahertz (THz) region for different kinds of optical communication and biomedical applications.
Design of Quasi-Shaped Spectroscopy Based Optical Sensor for the Detection of Alcohol
(Elsevier, 2023-08-29) Hossain, Md. Selim; Hossen, Rakib; Walid, Md. Abul Ala; Alvi, Syada Tasmia; Al-Amin, Md.; Sen, Shuvo; Azad, Mir Mohammad
In this research, an entirely novel optical sensor for alcohol detection based on quasi-shaped spectroscopy is offered. A quasi shape with a tightly bonded structure in the cladding region and a hexahedron core region makes up the recommended design, which has a remarkable sensitivity of about 91.35%, 92.55%, and 90.40%and low confinement losses (CLs) of 5.44 × 10−08 dB/m, 6.75 × 10−08 dB/m, and 5.85 × 10−08 dB/m for detecting alcohol like ethanol (n = 1.354), butanol (n = 1.3993), and propanol(n = 1.384), at 1 THz. The numerical aperture, the effective area, and the V-parameter have all been identified and assessed. The 0.8THz to 3 THz operational wavelength range is stated. In the COMSOL Multiphysics (Version 5.6) environment, the properties of these suggested alcohol sensors are numerically examined utilizing the FEM (finite element method) with full vectors. In contrast to other efforts, the proposed sensor, which consists of a quasi-lattice PCF with a perfectly matched layer (PML) of a circular air hole shape and TOPAS as the background material, aims to improve sensitivity response. The proposed sensor might be crucial in the alcohol detection process due to its superior sensitivity response, a single mode of operation across the entire operational terahertz range, and shallow confinement loss. So, this PCF can proficiently be pragmatic in many biological sensing and other THz technology domains.
Efficient Way for Chemicals Identification Using Hexagonal Fiber With the Terahertz (THz) Band
(Daffodil International University, 2022-04-11) Hossain, Md. Selim; Kamruzzaman, M. M.; Rahman, Md. Mizanur; Sen, Shuvo; Azad, Mir Mohammad
To detect chemicals, we proposed a photonic crystal fiber (PCF) with hexagonal cladding and a hexahedron core (THz). Circular air holes (CAHs) in the vestibule provide the basis of the suggested sensor. To develop and evaluate our suggested hexahedron PCF sensor, we employed the finite element (FEM) technique and perfectly matched layers (PML), which utilized the optical parameters numerically. Here, 92.65%, 95.25%, and 90.70% are relatively sensitive, and confining losses are low. The value 5.40 × 10− 08, 6.70 × 10− 08 dB/m, and 5.75 × 10− 08 dB/m for three chemicals such as Ethanol (n = 1.354), Benzene (n = 1.366) and Water (n = 1.330) and effective material loss (EML) of 0.00694 cm− 1. The suggested Hx-PCF sensor has been successfully tested at 1 THz. We are certain that the suggested sensor’s optimal geometric structure can be manufactured and that it can contribute to realworld applications in biomedicine and industry. In terahertz areas, our suggested PCF fiber is also suited for a wide range of medical signals and applications (THz).
Hexahedron Core with Sensor Based Photonic Crystal Fiber
(Elsevier, 2021-06) Hossain, Md. Selim; Kamruzzaman, M.M.; Sen, Shuvo; Azad, Mir Mohammad; Mollah, Mohammad Sarwar Hossain
A new structure of hexahedron core with the heptagonal shape of cladding regions based on photonic crystal fiber (Hx-PCF) is presented of this research work. The finite element method (FEM) and perfectly matched layers (PML) based COMSOL Multiphysics has been used to design this photonic crystal fiber (Hx-PCF) with appropriate design parameters. The fiber discloses the high relative sensitivity (RS) which stand 86.32%, 88.36%, and 84.25%, and low confinement losses along with the value of 5.60 × 10–08, 6.60 × 10–08 dB/m, and 5.55 × 10–08 dB/m for three chemicals such as Ethanol (n = 1.354), Benzene (n = 1.366) and Water (n = 1.330), respectively at operating region of 1 THz (THz). Furthermore, some other optical characteristics such as an effective mode index (EMI), effective area (EA), total power fraction (TPF), effective material loss (EML), V-Parameter are also analyzed along through essential graphic outputs. So, the results show the strong potential of this suggested Hx-PCF fiber for bio-medical areas to detect biochemicals and also industrial areas for identifying many types of chemicals by sensing procedure in the terahertz (THz) waveguide system.
Large Effective Area with High Power Fraction in the Core Region and Extremely Low Effective Material Loss-based Photonic Crystal Fiber ((PCF) in the Terahertz (THz) Wave Pulse for Different Types of Communication Sectors
(Journal of Optics, Springer, 2021-07-04) Hasan, Md. Mahamudul; Barid, Mimun; Hossain, Md. Selim; Sen, Shuvo; Azad, Mir Mohammad
In this work, an excellent design of photonic crystal fiber (PCF) with five layers of a hexagonal lattice of air holes (AHs) of cladding region as well as two elliptical air holes in the core area (CA) has been presented for terahertz (THz) wave pulse propagation. The finite element method with perfectly matched layers has been used to design our proposed fiber L-PCF to achieve the low effective material loss (L-EML) in the terahertz regime for communication applications. After the simulation procedure, our proposed low-loss PCF (L-PCF) fiber shows a low effective material loss of 0.007 cm−1, with power fraction (PF) in the core area of 80% and a large effective area of 3.46 × 10–8 m2 at 1 terahertz (THz). Moreover, other optical properties such as V-parameter, scattering loss, and confinement loss are also reported here. For different types of optical and telecommunication applications, our suggested L-PCF fiber will be highly suitable at the terahertz (THz) wave guiding.
Performance Analysis of Alcohols Sensing with Optical Sensor Procedure Using Circular Photonic Crystal Fiber (C-Pcf) in the Terahertz Regime
(Daffodil International University, 2021-12-17) Hossain, Md. Selim; Hussain, Nazmul; Hossain, Zakir; Zaman, Md. Sakib; Rangon, Md. Navid Hasan; Abdullah-Al-Shafi, Md.; Sen, Shuvo; Azad, Mir Mohammad
In this study, a TOPAS-based optical sensor for detecting alcohols in drinks and liquids, made of circular air holes (CAH) in the cladding and a hexahedron core is suggested here. In addition, COMSOL Multiphysics program for development and analysis of the sensing qualities of a PCF-based sensor using finite element technical as a solution. In the THz frequency band, the described C-PCF structure has an exceptionally high relative sensitivity of 86.60%, 88.70%, and 84.71%, and low confinement losses (CLs) are 5.75 × 10−08, 6.11 × 10−08 dB/m and 5.70 × 10−08 dB/m for three alcohols such as Ethanol (n = 1.354), Butanol (n = 1.399), and Propanol (n = 1.387), respectively at monitoring region of 1 THz. Alcohol is widely used in both the food and beverage sectors and chemical operations. The detection methods of alcohol thus must be accurate, accurate, and reliable. This content modeling and analysis in the terahertz frequency range is a novel TOPAS-based photonic crystal fiber (C-PCF). Moreover, the total power fraction and effective area are also determined in the terahertz frequency range. Due to its excellent waveguiding characteristics, this suggested sensor has the potential to be employed in alcohols detection as well as polarization preserving terahertz wave applications.
Sensitivity Analysis for Detecting Chemicals by the Optical Chemical Sensor Based Photonic Crystal Fiber (PCF) in the Terahertz (THz) Regime
(Physica Scripta, 2021-12-23) Hossain, Md Selim; Faruq, Md Omar; Rana, Md Masud; Sen, Shuvo; Haque, Md Dulal; Azad, Mir Mohammad
This research article demonstrates a good simulation result for identifying and detecting various industrial chemicals in a Terahertz (THz) waveguide with a new heptagonal, five layers of heptagonal photonic fiber elliptic form, heptagonal cladding shape (H-PCF). COMSOL 4.2 software based on finite element (FEM) methods and perfectly matched layers check our composition (PML). The different chemicals are also differentiated and identified by each other in different parameters H-PCF fibers show a high relative sensitivity of ethanol of approximately 86.50 percent after numerical analysis, Benzene around 89.35%, and water around 85.15% at a frequency of around 0.7 THz. In our experiment, we obtained very low confinement losses at 1 terahertz (THz) such as 5.95 × 10−08 dB/m for Ethanol 6.67 × 10−08 dB/m for Benzene, and 5.80 × 10−08 dB/m for water. Regarding these results, we can strongly recommend that our proposed heptagonal photonic crystal fiber (H-PCF) will be more congenial in biomedical, bio-medicine, and industrial areas for the identification and detection of various types of chemicals with the help of a THz waveguide.
Simulation and Analysis of Ultra-Low Material Loss of Single-Mode Photonic Crystal Fiber in Terahertz (THz) Spectrum for Communication Applications
(Scopus, 2021) Hossain, Md. Selim; Hasan, Md. Mahedi; Sen, Shuvo; Mollah, Md. Sarwar Hossain; Azad, Mir Mohammad
This analysis represents a circular shape based cladding with two elliptical shape cores in photonic crystal fiber (PCF) for the terahertz (THz) range. Here, we present a single-mode photonic crystal fiber (SM-PCF) with five layers of circular shape of air holes (CAH) structure along with two layers of elliptical shape of air holes (EAH) core configuration in the center to decrease the different types of losses. For broad-band communications, our proposed SM-PCF is highly useful due to the obtaining of ultra-low effective material loss (UML) in the terahertz regime. Perfectly matched layers (PMLs) and finite element method (FEM) established on COMSOL Multiphysics software has been used to design this PCF fiber. Simulated outcomes show a particularly an UML deficit of 0.014 cm −1 , power fraction in the core area (CA) and large effective area (EA) of 72%, and 5.90 × 10 −8 m 2 respectively at 1 terahertz (THz) frequency. Also, other aspects of optical fiber for THz signal banquet with confinement loss (CL), scattering loss (SL) and V-parameter have been calculated here. Moreover, our proposed SM-PCF shows single-mode propagation by V-parameter pointer over 0.80-3 THz frequency. So, we can say that our designed PCF fiber will be suitable for various effective communication areas at the terahertz (THz) spectrum.
Simulation and Analysis of Ultra-Low Material Loss of Single-Mode Photonic Crystal Fiber in Terahertz (THz) Spectrum for Communication Applications
(Walter de Gruyter GmbH, 2021-02-17) Hossain, Md. Selim; Hasan, Md. Mahedi; Sen, Shuvo; Mollah, Md. Sarwar Hossain; Azad, Mir Mohammad
This analysis represents a circular shape based cladding with two elliptical shape cores in photonic crystal fiber (PCF) for the terahertz (THz) range. Here, we present a single-mode photonic crystal fiber (SM-PCF) with five layers of circular shape of air holes (CAH) structure along with two layers of elliptical shape of air holes (EAH) core configuration in the center to decrease the different types of losses. For broad-band communications, our proposed SM-PCF is highly useful due to the obtaining of ultra-low effective material loss (UML) in the terahertz regime. Perfectly matched layers (PMLs) and finite element method (FEM) established on COMSOL Multiphysics software has been used to design this PCF fiber. Simulated outcomes show a particularly an UML deficit of 0.014 cm −1 , power fraction in the core area (CA) and large effective area (EA) of 72%, and 5.90 × 10 −8 m 2 respectively at 1 terahertz (THz) frequency. Also, other aspects of optical fiber for THz signal banquet with confinement loss (CL), scattering loss (SL) and V-parameter have been calculated here. Moreover, our proposed SM-PCF shows single-mode propagation by V-parameter pointer over 0.80-3 THz frequency. So, we can say that our designed PCF fiber will be suitable for various effective communication areas at the terahertz (THz) spectrum.
Transparent Blockchain-Based Electronic Voting System
(Daffodil International University, 2022-02-24) Islam, Md. Tarequl; Hasan, Md. Sabbir; Sikder, Abu Sayed; Hossain, Md. Selim; Azad, Mir Mohammad
The research work scrutinizes an e-voting concept that is on the platform ethereum blockchain. Ethereum is a distributed computing platform that is free, open source with the functionality of smart contracts. By utilizing this depiction, it is feasible to originate engrossing scientific prominence which enables the thoughtful in sober fact collaboration occurring in the blockchain. E-voting is the most accepted worldwide because it is a tool that every moment signifies the democracy of the election. Consequently, most of the countries persevere to experiment and development of the e-voting process. Blockchain technology is responsible for a decentralized design that designates advanced data simultaneously among the P2P network barring a central database. At last, the experiment addressed the debilitation of the existent e-voting method and successfully fruitful blockchain technology to unravel that feebleness.