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Item Design and analysis of slotted core photonic crystal fiber for gas sensing application(Elsevier B.V., 2018-09-12) Paul, Bikash Kumar; Rajesh, E.; Asaduzzaman, Sayed; Islam, Md. Shadidul; Ahmed, Kawsar; Amiri, I.S.; Zakaria, R.In this paper, a slotted core photonic crystal fiber (PCF) has been designed. A rigorous numerical investigation has been done over the wider range of the wavelength from 1.30 µm to 2.0 µm near inferred region (IR). By employing full Victoria finite element method (FV-FEM) having completely circular anisotropic perfectly matched layer (C-PML) different optical parameter such as nonlinearity, confinement loss, sensitivity, beat length, V-parameter and splice loss of the modeled PCF have been uncovered. The investigated upshot testifies that the birefringence gained at the order of 10−2. Nevertheless, the proposed fiber experienced with the lower order (1.26 × 10−5 dB/m) of confinement loss with a higher order of nonlinearity 54.33 W−1 km−1 at simultaneously at the operating optical wavelength λ = 1.33 µm. Moreover, the impacts of the geometric parameters have been turned on birefringence, nonlinearity and confinement losses which are also analyzed in detail. The proposed PCF model with investigated results provides stronger evidence that, the structure will play a substantial role in the area of optical waveguides as well as optical devices or instrumentations.Item Improved Quality of Service in ZigBee network with statistical modeling(IEEE Xplore, 2016-07-11) Islam, Nazrul; Biddut, Md. Jaminul Haque; Swapna, Asma Islam; Asaduzzaman, SayedWireless Sensor Network (WSN) comprises the less power consuming, light weight and effective Sensor Nodes (SNs) for higher network performance. ZigBee is the real time application for the WSN used for low-cost data and energy consumption characteristics. ZigBee is a robust network certain application of which has come out with a critically low designation for less data rate, long delivery delay and packet loss as well in order to lower the cost. However, ZigBee devices have many potential features to make a splendid wireless network. Hence, putting an improvement analogy inside the performance parameter is a way to overcome the limitations of ZigBee usage in certain scales. ZigBee follows a model for its node distribution, traffic routing and Quality of Service (QoS). The QoS indicates the efficiency and performance of any network. The increase in efficiency of QoS on the ZigBee network lies in the realization of maximizing throughput of the network. This paper is destined to represent the improved QoS in the ZigBee network applying Stochastic and Widest Path models. Riverbed Simulator v17.5 is used to investigate foremost QoS parameters in the ZigBee network. The optimized result of this study will be handy in the application field of the ZigBee network. And it also best fits for the deployment of the large-scale device to device communication. Full Text Link: http://doi.org/10.1109/ICAEE.2015.7506824Item Porous core Photonic Crystal Fiber based chemical sensor(IEEE Xplore, 2017-02-16) Paul, Bikash Kumar; Islam, Md. Shadidul; Chowdhury, Sawrab; Asaduzzaman, Sayed; Ahmed, KawsarIn this paper, a porous core photonic crystal fiber based chemical sensor has been proposed. The cladding of the proposed PCF is hybrid where inner three layers are hexagonal and the outer two layers are circular. The proposed PCF shows higher relative sensitivity and low confinement loss simultaneously. For the investigation of the proposed photonic crystal fiber a full vectorial finite element method (FEM) was used. Geometric parameters like diameters of the holes and pitch are varied to optimize the Proposed PCF. The proposed PCF can be used for detecting the lower index chemical like ethanol which is industrially valuable. Moreover, the proposed PCF can sense the chemicals in a wide range of wavelength from 0.8 μm to 1.9 μm. Full Text Link: http://doi.org/10.1109/ICECE.2016.7853903Item Spiral photonic crystal fiber for gas sensing application(IEEE Xplore, 2017-02-16) Islam, Md. Ibadul; Khatun, Maksuda; Sen, Shuvo; Ahmed, Kawsar; Asaduzzaman, SayedThis paper proposes, the design and characterization of a spiral shape photonic crystal fiber for gas sensing application. The core region of the proposed PCF is oriented with elliptical air holes in a hexagonal shape and the cladding is oriented in a spiral manner. The proposed PCF not only shows high sensitivity but also shows high birefringence as well. The geometrical parameters were altered to fix the optimized structure. By utilizing finite element method (FEM) the numerical analysis of the proposed PCF is performed. Our proposed PCF shows the high sensitivity of 42.27% and high birefringence of 1.94×10 -2 at λ=1.33μm which is the absorption line of toxic gasses like (methane and hydrogen fluoride). Full Text Link: http://doi.org/10.1109/ICECE.2016.7853900Item Enhancement of sensitivity and birefringence of a gas sensor on micro-core based photonic crystal fiber(IEEE Xplore, 2017-03-09) Asaduzzaman, Sayed; Paul, Bikash Kumar; Ahmed, KawsarThis paper proposed a microstructure cored photonic crystal fiber for gas sensing applications. The key research vision is to identify hazardous and colorless gases over a larger range of wavelength band covering 1 μm to 2.2 μm. Numerical simulation on the proposed PCF is carried out by full vectorial finite element method (FEM) with perfectly matched layer. The proposed PCF core contains vertically arranged elliptical holes which enhances both relative sensitivity and birefringence. The analysis depicts that the proposed PCF shows high sensitivity of 43.7%, high birefringence of 8.62×10 -3 and low confinement loss of 1.89×10 -6 dB/m at the wavelength of 1.33 μm. The structural geometric parameters have tuned to optimize the parameters of proposed PCF. Full Text Link: http://doi.org/10.1109/CEEICT.2016.7873090Item Simulation based analysis of formalin detection through photonic crystal fiber(IEEE Xplore, 2016-12-01) Arif, Md. Faizul Huq; Biddut, Md. Jaminul Haque; Ahmed, Kawsar; Asaduzzaman, SayedFormalin is a dangerous organic chemical substance in today's life. It is the solution of two substances; Formaldehyde and Water. Formalin is used forlong time preservation for various types of foods and other things from rotting. It affects human life to environmental ecology. Formalin detection is a challenging task. Without chemical experts, it is hard to detect and it is also a time consuming task. In this regard, a smart, reliable but simple detection technique is on demand. To detect it efficiently, the optical characteristic of Formalin such as refractive index is chosen for analysing. This paper presents a Photonic Crystal Fiber (PCF) based Formalin sensing technique. A simple PCF structure has been proposed to sense Formalin. The structure follows all the optical properties for the propagation of light energy. An intensive simulation has been done. The simulation results show that the proposed simple PCF structure is handy to detect Formalin with a remarkable sensitivity. Full Text Link: http://doi.org/10.1109/ICIEV.2016.7760106Item High sensitive PCF based chemical sensor for ethanol detection(IEEE Xplore, 2016-12-01) Arif, Md. Faizul Huq; Asaduzzaman, Sayed; Ahmed, Kawsar; Morshed, MonirIn this paper, a high sensitive photonic crystal fiber structure has been presented for ethanol sensing. Optical properties of the guided mode have been analyzed using full vectorial finite element method. We have investigated the sensing properties varying different geometrical properties of the proposed structure. We have optimized the design parameters of the proposed PCF which are responsible for high sensitivity. The simulation results show that the sensitivity and the confinement loss of the proposed photonic crystal fiber are 34% and 1.2×10 -4 dB/m respectively at the wavelength of 1.33μm. Full Text Link: http://doi.org/10.1109/ICIEV.2016.7760031Item A comparative analysis of two different PCF structures for gas sensing application(IEEE Xplore, 2016-07-11) Arif, Md. Faizul Huq; Ahmed, Kawsar; Asaduzzaman, SayedToxic or Flammable gases and leakage of the gas lines can be detected by photonic crystal fibers for avoiding pollution, explosion or fire. Two different structures of hollow core based Photonic crystal fiber (HC-PCF) has been presented in this paper. The sensitivity of the proposed structures was numerically investigated by finite element method (FEM) varying the optical and geometrical properties. The numerical results show that the proposed PCF with six air holes shows 2.22 times higher sensitivity than the PCF with eight air holes in the first layer. Both of the PCFs exhibit reduced confinement loss also. The proposed PCFs can sense the lower refractive index based gases (toxic/ flammable) at a wide range of wavelength 0.8 μm to 2μm. Full Text Link: http://doi.org/10.1109/ICAEE.2015.7506842Item Numerical analysis of O-PCF structure for sensing applications with high relative sensitivity(IEEE Xplore, 2016-01-28) Ahmed, Kawsar; Asaduzzaman, Sayed; Arif, Md. Faizul HuqIn this study, micro structured core and cladding based O-PCF has been analyzed by its propagation characteristics. The effects of pitch variation, total power consumption and effective refractive index are investigated on O-PCF. The analyzing process takes place by the full vectorial finite element method (FEM). The analysis O-PCF contains five layers of the air holes in octagonal shape which increases relative sensitivity significantly and decreases confinement loss than the prior structures. Beyond that, the analysis O-PCF can sense the three chemicals water, Ethanol and Benzene at a wide range of wavelength. Full Text Link: http://doi.org/10.1109/EICT.2015.7391956Item Highly Sensitive Simple Structure Circular Photonic Crystal Fiber Based Chemical Sensor(Researchgate, 2015-12) Asaduzzaman, Sayed; Arif, Md. Faizul Huq; Ahmed, Kawsar; Dhar, PriyankaA circular photonic cryst structure is presented in this paper as a chem both core and cladding are micro structure method (FEM) has been applied to investiga characteristics of proposed C-PCF structure. and Confinement loss are numerically exami by varying the different parameters of the p Finally, it is found that the simple 3 rings C-PC higher sensitivity as well as lower confine wavelength 1.33μm Full Text Link: http://doi.org/10.1109/WIECON-ECE.2015.74438