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1464 articles for “loss”
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Investigations with WDM Network using Optical Cross Connects
Abstract: AbstractOptical cross-connects are key part of the wavelength division multiplexed based optical communication networks. Accordingly, this paper is focused on the performance evaluation for the optical cross-connects. Here, WDM system for the non-return to zero with 100 GHz channel to channel spaced network has been designed. The optical link’s performance has been numerically simulated and successfully explored for the numerous key design parameters at 20 Gbps data rate. Investigations inferred …
Published in Trends in Opto-electro & Optical Communication · Vol. 7, Issue 3, 2017 · pp. 1–6 Read article
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Feasibility Analysis of Advanced Modulation Techniques for FSO in Different Weather Conditions
Abstract: AbstractIn recent times, the ever increasing demand of higher bandwidth and more data rate had led researchers to explore new dimensions in wireless technology. One of the most promising fields is that of free-space optics (FSO). Light is used to carry information through space with the physical medium being the air. This paper investigates the effect on Q-factor and power loss for various advanced modulation schemes under different weather conditions. …
Published in Trends in Opto-electro & Optical Communication · Vol. 6, Issue 2, 2016 · pp. 1–7 Read article
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An Analysis of Optical Transmission System using Fiber Bragg Grating (FBG) with Power Optimization and Dispersion Compensation
Abstract: AbstractThe Fiber Bragg Grating (FBG) is a low cost filter for wavelength selection and also has low insertion loss. We know that Dispersion Compensation (DC) and Power Optimization (PO) are one of the most important parameters of the optical communication system. In this proposed communication model, dispersion compensation has been achieved and also we optimized almost same power at the receiver end, also we have calculated output power for different …
Published in Trends in Opto-electro & Optical Communication · Vol. 5, Issue 2, 2015 · pp. 1–5 Read article
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Effects of Cavity Length on the Performance Characteristics of InGaN based 420 nm MQW Blue Violet Laser
Abstract: AbstractThis research work has been carried out to improve the performance of a MQW blue violet laser to get an efficient and high power output. For this purpose the structure is designed using In0.156Ga0.844N/Al0.07Ga0.93. A high performance of the laser is obtained with the optimized values of injection current and differential gain. A maximum optical output power of 220.3 mW is obtained which enhances the designed laser for the application …
Published in Trends in Opto-electro & Optical Communication · Vol. 4, Issue 2, 2014 · pp. 20–26 Read article
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Efficient and High Power InGaN Based MQW Blue Laser
Abstract: AbstractThis research work deals with the design of a 450 nm MQW blue laser to get the optimized output power and efficiency. The maximum output power is found for an injection current of 120 mA. This laser is designed to improve the performance of a MQW blue laser to get an efficient and high power output. For this purpose the structure is designed using In0.235Ga0.765N/Al0.07Ga0.93. A high performance of the …
Published in Trends in Opto-electro & Optical Communication · Vol. 4, Issue 3, 2014 · pp. 14–22 Read article
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10 Mbs Ethernet via Free Space Optic during Rainy Weather
Abstract: ABSTRACTFree space optics (FSO) is a potential solution for high bandwidth demand in temperate countries, like Malaysia and shows a great choice for last-mile problem where implementation of fiber optic cables is very limited due to deployment time and cost constraint. The control of these phenomena will allow to evaluate the system performance and then to improve their reliability. The aim of this paper is to compare the behavior of …
Published in Trends in Opto-electro & Optical Communication · Vol. 2, Issue 2, 2012 · pp. 1–7 Read article
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Performance Study of Parabolically versus Exponentially Tapered Multimode Interference Coupler
Abstract: ABSTRACT This paper shows mainly the performance study on tapered section of Multimode Interference (MMI) coupler having either parabolic or exponential taper section. The comparative study of the 1 × 2 MMI coupler with proposed structure, such as the normalized width variation, and variation of MMI length are investigated by the 2D finite difference beam propagation method (BPM). We have found that exponential tapered MMI coupler has advantageous compared to …
Published in Trends in Opto-electro & Optical Communication · Vol. 2, Issue 2, 2012 · pp. 8–17 Read article
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BER Analysis in Optical Fiber Communication System using Different Optical Amplifiers
Abstract: AbstractThis paper describes the simulation study of losses that occurs in the optical fiber communication system with and without optical amplifiers. The analysis is done in the OPTISYSTEM 16.0 software on the basis of Q-factor, BER and eye height for different optical amplifiers which are Erbium Doped Fiber Amplifier (EDFA) and Semiconductor Optical Amplifier (SOA)Keywords: BER, eye diagram, Q-factor, eye height, SOA, EDFA, OPTISYSTEM 16.0Cite this ArticleArpitha G.A. BER Analysis …
Published in Trends in Opto-electro & Optical Communication · Vol. 9, Issue 3, 2019 · pp. 33–42 Read article
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Compact Fork-shaped Monopole Antenna for Bluetooth, WLAN and Wi-MAX Applications
Abstract: This paper presents a fork-shaped monopole antenna (FSMA) with compact size. The proposed FSMA consisting a fork-shaped radiator and a partial ground plane with L-shaped and rectangular slits. The size of the proposed FSMA is 34×18×1.6 mm3 which is fed by 50Ω microstrip line. The L-shaped slit is introduced in the ground plane to enhance the bandwidth impedance of the proposed FSMA. The proposed antenna achieved 10dB return loss bandwidth …
Published in Trends in Opto-electro & Optical Communication · Vol. 11, Issue 1, 2021 · pp. 1–6 Read article
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Understanding of optical power in semiconductor based SOI Structure at the signal 1550 nm
Abstract: A silicon-on-insulator (SOI) structure consists of a single crystalline silicon layer separated from the bulk substrate by a thin insulator layer. The insulator in SOI wafers is usually always a thermal silicon oxide (SiO2) layer, with a silicon wafer as the substrate. The silicon sheet can be very thin (50 nm for fully depleted transistors) or tens of micrometres thick, depending on the application. Similarly, the thickness of buried oxide …
Published in Trends in Opto-electro & Optical Communication · Vol. 12, Issue 1, 2022 · pp. 19–23 Read article
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A Case Study on Analysis of Road Safety concerns on a stretch of National Highway 12 in Rajasthan
Abstract: AbstractRoad safety is a growing social concern in the present day world. Rapid expansion in the road network and high motorization growth has led to serious impacts on road safety levels in India. The analysis of road accident data 2015 reveals that about 1,374 accidents and 400 deaths took place every day on Indian roads, which further converted into 57 accidents and loss of 17 lives on an average every …
Published in Trends in Transport Engineering and Applications · Vol. 4, Issue 3, 2017 · pp. 1–7 Read article
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A Review of Traffic Noise Standards and Noise Models
Abstract: Traffic noise is one of the most irritating pollutions which affect human health in various forms, be it permanent hearing loss, shifting of hearing threshold, irritation/psychological problem, blood pressure, sleeping disorder, premature child birth, etc. The noise generated in the base year of any project may not be harmful, but it may be harmful by horizon year. Under this condition, noise mitigation measures need to be inbuilt in the project …
Published in Trends in Transport Engineering and Applications · Vol. 1, Issue 1, 2014 · pp. 10–19 Read article
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Identifying Black Spot Location Using GIS System in Kerbela City
Abstract: From the challenges facing the world in highway area is the life and financial loss due to traffic accidents. This is the case for Iraq because it is from the most dangerous countries in terms of traffic accidents. To reduce traffic accidents, the causes of these accidents such as; driver, vehicle and roadway should be determined. To diagnose the cause of accidents, there is an urgent need to determine the …
Published in Trends in Transport Engineering and Applications · Vol. 3, Issue 2, 2016 · pp. 1–6 Read article
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Enhanced Railway Operations Using Automated Locomotive Simulator
Abstract: : Recent statistics indicates about 85 per cent of overall fatalities is caused by humans due to insufficient resources resulting in overworked and inexperienced workers. The deaths of civilians and machinery due to a lack of automation could have severe consequences for the economy of the country. Certain considerations were intercommunication between trains and introduction of passenger safety reporting in emergencies at grass roots level. We suggest eliminating such challenges …
Published in Trends in Transport Engineering and Applications · Vol. 7, Issue 1, 2020 · pp. 17–23 Read article
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Cost Optimisation-A Case Study of Infrastructure Project
Abstract: The Double Deck component between Automotive Square and Gaddigodam comprised of main spine segment and two wing segments on either sides of spines. Both these spine and wing segment were pre-cast at casting yard and erected at site using double deck launching girder and wing erector system respectively. Further to integrate these components, stitch concrete is provided from bottom of wings using Manlift which required shuttering to be undertaken requiring …
Published in Trends in Transport Engineering and Applications · Vol. 8, Issue 2, 2021 · pp. 47–58 Read article
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Railway Accidents Analysis of Western Zone of Bangladesh
Abstract: Abstract: The railway is one of the fundamental and popular modes of transportation in the entire world. Although the railway is considered to be the safest for transportation, accidents are occurring frequently in Bangladesh. During the period from the year 2016 to 2018, about 136 railway accidents have taken place in western zone of Bangladesh Railway. Apart from this, a recent report identified more than 700 level-crossings, operating without gatemen, …
Published in Trends in Transport Engineering and Applications · Vol. 9, Issue 1, 2022 · pp. 1–10 Read article
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Design of Microstrip Yagi Uda Antenna by Using Triangular Patches
Abstract: AbstractA novel design of microstrip yagi uda antenna by using triangular patches at resonating frequency of 9.4 GHz is proposed in this paper. The microstrip antenna is designed by using triangular patches which improves the gain, directivity and efficiency of the antenna. The microstrip yagi uda antenna was simulated by Computer simulation technique (CST) MW studio software. In this paper, the simulated results such as radiation pattern, input impedance, return …
Published in Current Trends in Information Technology · Vol. 3, Issue 1, 2013 · pp. 21–23 Read article
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Designing an Energy Efficient Induction Motor: Advanced Computational Intelligence Technique
Abstract: Abstract—This paper presents an advanced computational intelligence technique (CIT), modified particle swarm optimization (MPSO) for designing energy efficient three-phase induction motor (DEEIM) including active power loss effect. PSO performs well for small dimensional and less complicated problems but fails to locate global minima for complex multi-minima functions. Even if PSO algorithm is easy to implement and has been shown to perform well on various power system optimization problems, they may …
Published in Current Trends in Information Technology · Vol. 9, Issue 2, 2019 · pp. 5–13 Read article
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Image Denoising and Various Techniques: Survey
Abstract: Whenever an image is formed, various factors like lightning which includes its source, distance, intensity, and the camera characteristics, which included the sensor responses, lenses, and so on, affect the overall appearance of the image. The noise is one of the key components in this. It is important to remove noise in such a way that the overall quality is maintained and there is no loss of image information. There …
Published in Current Trends in Information Technology · Vol. 12, Issue 3, 2022 · pp. 6–11 Read article
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Design and Performance Analysis of an UWB Wearable Patch Antenna for WBAN Applications
Abstract: In this paper we represent an ultra-wide band wearable textile antenna for body area network. The proposed antenna consists of a decagonal radiating patch and a partial ground plane with a square slot. For textile antenna, the textile materials and the planer shapes provide a smooth integration into clothing while preserving the characteristic properties of the textile. The ultra-wide band for these types of antenna is achieved by optimizing the …
Published in Journal of Communication Engineering & Systems · Vol. 7, Issue 3, 2017 · pp. 1–7 Read article