Search results for “Optics”

Published Subscription 1 Oct 2021

By Manish Choudhary, Sagar Patil, Mayank Kothari

Abstract: Light Fidelity is the abbreviation for Light Fidelity. The concept is relatively new, having been introduced by German scientist Harald Haas at the 2011 TED Global Talk on Visible Light Communication (VLC). Li-Fi is a wireless optical networking system that transmits data using light emitting diodes (LEDs). Visible light communication (VLC) technology is referred to as Li-Fi. 802.15.7. IEEE 802.15.7 is a wireless communication technology based standard that is high-speed, …

Published in Journal of Microelectronics and Solid State Devices · Vol. 8, Issue 2, 2021 · pp. 1–6 Read article

Published Subscription 15 Feb 2023

Influence of B2O3 and Li2O on Physical, Thermal and Spectroscopic properties of Bi2O3-B2O3-CdO-Li2O glass system

By R V Neeraja, J. Bhemarajam, Ashok Ande, V. Vamsi Priya, M. Prasad

Abstract: ABSTRACT Bismuth Borate based glasses with compositions BiBCL: 40Bi2O3-(40-X) B2O3-20CdO-XLi2O where x=5,10,15,20,25 mol% were prepared by conventional melt quenching technique. X-ray diffraction (XRD), differential thermal analysis (DTA), UV-VIS absorption spectroscopy, Fourier transform-infrared (FTIR), and Raman spectroscopies were used to analyse the synthesized samples. Through XRD and SEM studies, the synthesized glasses amorphous nature was confirmed. To evaluate the physical and structural characteristics of the glasses, calculations were made for the …

Published in Journal of Polymer & Composites · Vol. 11, Issue 1, 2023 · pp. 51–62 Read article

Published Subscription 8 Jan 2024

Fabrication of MOF5 -GO nanocomposites by tailoring graphene oxide

By Meena Yadav, Isha Saini, Sita Ram, Tanuj Kumar

Abstract: The present paper focusses on the synthesis of graphene oxide and its nanocomposite with metal organic framework (MOF-5). Graphene oxide (GO) was prepared using modified hummer’s method with different concentrations of oxidizing agent to vary the presence of functional group on the surface of GO. The presence of functional group plays a crucial role in determining the interactions between GO and MOFs. To confirm the presence of different functional groups …

Published in Journal of Polymer & Composites · Vol. 12, Issue 1, 2024 · pp. 101–114 Read article

Published Subscription 8 Apr 2019

Emerging Trends in Applications of Semiconductor Alloys in Wireless Communications

By Alla Srivani, Vedam Rama Murthy, G. Veeraraghavaiah

Abstract: AbstractArsenide semiconductor alloys provide a natural means of tuning the magnitude of the forbidden gap and other material parameters so as to optimise and widen the application of semiconductor devices. With the advent of small-structure systems, for instance quantum wells and superlattices, the special effects of alloy composition, size, device geometry, doping and controlled lattice strain can be collective to accomplish maximum tunability. In this article, the concepts and ideas …

Published in Journal of Semiconductor Devices and Circuits · Vol. 3, Issue 1, 2016 · pp. 31–41 Read article

Published Subscription 12 Jun 2018

Synthesis and Characterization of In2S3 Nanoflake Thin Film for Photosensor Applications

By Rajesh A. Joshi

Abstract: Indium sulphide (In2S3) thin films in the form of nanoflakes are synthesized by using chemical vapour deposition method on glass substrate with the intension to test its photosensor applications. These as deposited nanoflake thin films are characterized for physicochemical properties using X-ray diffraction (XRD) pattern, energy dispersive X-ray (EDAX) analysis,scanning electron microscopy (SEM) while optoelectronic properties were studied using optical and electrical characteristics obtained through UV-Vis transmission spectroscopy and I-V …

Published in Journal of Thin Films, Coating Science Technology & Application · Vol. 4, Issue 3, 2017 · pp. 21–26 Read article

Published Subscription 22 Apr 2019

Detailed Study On Physical Properties Of Silicon Nitride Films Deposited By Plasma Enhanced Chemical Vapour Deposition System

By S. R. Yadhuraj, M. N. Talwar, T. K. Subramanyam

Abstract: Amorphous silicon nitride films have been deposited by radio frequency plasma enhanced chemical vapor deposition (RF-PECVD) technique using silane (SiH4) and ammonia (NH3) as source gases. Investigations have been made in detail to understand the influence of process parameters such as RF power, substrate temperature, gas flow ratio, working pressure etc, on the optical, electrical and surface properties in order to obtain dielectric Si3N4 films for semiconductor device applications. Amorphous …

Published in Journal of Thin Films, Coating Science Technology & Application · Vol. 3, Issue 1, 2016 · pp. 1–8 Read article

Published Subscription 22 Apr 2019

Morphological and Dielectric Relaxation Responses of Polymer Stabilized Ferroelectric Liquid Crystal Composite Films

By RISHI KUMAR, Pooja Goyal, Manju Middha, K K Raina

Abstract: Polymer-stabilized ferroelectric liquid crystal (GH-PSFLC) composite films have been prepared by polymerization-induced phase separation (PIPS) process as a function of polymer concentration. Epoxy polymer was homogeneously dispersed into FLC host matrix to create fibril network in the composite films. Twisted fibril-like network was observed through polarizing optical microscope through transmission mode. Dielectric relaxation spectroscopy of these composites shows that real part of permittivity decreases with polymer concentration. Goldstone relaxation mode …

Published in Journal of Thin Films, Coating Science Technology & Application · Vol. 2, Issue 2, 2015 · pp. 8–12 Read article

Published Subscription 31 Aug 2020

Preparation and Characterization of Aluminium Doped ZnO Thin Films by Spin Coating Technique

By S. Naseema Banu, M.S. Mohamed Hussain, S. Mahalakshmi, N. Sekar, Gnanasa ravanan, A. Ayeshamariam

Abstract: In this work, the preparation of Al-doped ZnO (AZO) thin films by the sol-gel spin-coating method is reported. The structural properties and surface morphologies of film prepared at RT were characterized by X-ray diffraction (XRD) and field emission scanning electron microscope (FE-SEM). The XRD and SEM results disclosed that the crystallization quality and grain size of as-prepared films were highly influenced by Al doping. Laser Raman Spectrometer results indicated that …

Published in Journal of Thin Films, Coating Science Technology & Application · Vol. 7, Issue 2, 2020 · pp. 16–22 Read article

Published Subscription 20 Sep 2021

Study of Nano Germanium and Composited Forms

By B. Goswami

Abstract: This article has reviewed refinement synergism to same as earlier bulk semi-conduction. Colloidal 5 nm suspension from photolysis and pyrolysis for aerogel of II-VI quantum dots has subsidized extinction contour of semiconductor nano-crystal. Thereby transitional has accused between 0.6 to 5 eV to access from size-dependent optical and electrical effect instead of precipitation technique. Structure-oriented electronic and optical property has relevance to nano-semiconductor preparation method synergistic to earlier bulk. Nano-crystals …

Published in Journal of Thin Films, Coating Science Technology & Application · Vol. 8, Issue 2, 2021 · pp. 8–15 Read article

Published Subscription 5 Mar 2019

Mean based Load Adaptation Algorithms (MLAA) for Energy Saving in FiWi Access Networks

By Uma Rathore Bhatt, Abhilasha Chaure, Raksha Upadhyay

Abstract: AbstractFiber Wireless (FiWi) network has been evolving as a promising broadband access network. It provides high data rate, flexibility and stability to the users. Exponential growth in broadband access networks has opened many research challenges. Energy conservation is one of them. In FiWi network, among all the components, optical network unit (ONU) consumes most of the power of the network. Hence, to keep ONU in low power state while ensuring …

Published in Trends in Opto-electro & Optical Communication · Vol. 6, Issue 3, 2016 · pp. 23–32 Read article

Published Subscription 30 Mar 2019

BER Performance of Hybrid 2×8 SCM/WDM System Based on Raman Amplifier

By P. Sivakumar

Abstract: AbstractWhen subcarrier multiplexing (SCM) is combined with wavelength division multiplexing (WDM) the resultant hybrid multiplexing strategy can benefit from readily available commercial components. Hybrid SCM/WDM systems are quite useful for LAN and MAN applications. They can provide broadband integrated services to the subscriber. This paper investigates the performance of two module SCM transmitter that consist of eight binary phase shift keying modulated data streams each transmitted at a speed of …

Published in Trends in Opto-electro & Optical Communication · Vol. 6, Issue 1, 2016 · pp. 1–7 Read article

Published Subscription 30 Mar 2019

Feasibility Analysis of Advanced Modulation Techniques for FSO in Different Weather Conditions

By Mohammad Irfan Khan, Ebad Zahir

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

Published Subscription 30 Mar 2019

Real-Life Demonstration on the Surface-Driven Capillary Flow in Microfluidic Devices

By Subhadeep Mukhopadhyay

Abstract: AbstractIn this research paper, glass and PMMA are chosen as materials to fabricate the microfluidic devices due to the optical transparency of these materials. The microfluidic devices are fabricated by the maskless lithography (non-contact lithography), hot embossing lithography (contact lithography), indirect bonding technique, and direct bonding technique. The surface-driven capillary flow is recorded corresponding to each microfluidic device by a CMOS camera. The colour-images are compared with the gray-scale-images for …

Published in Trends in Opto-electro & Optical Communication · Vol. 6, Issue 2, 2016 · pp. 8–17 Read article

Published Subscription 30 Mar 2019

Performance Study in Modified DPSK, MZI Delay Mismatch at 40Gbps Fiber Dispersive Channel

By Devendra Kr. Tripathi

Abstract: AbstractHigher data rate transmission is a desirable feature for the communication system in every era. As they have potentially higher fiber capacity, also have lower cost per bit. This paper presents performance investigation with partial differential phase shift keying and influence of MZI delay mismatch in the high data rate dispersive channels. Ideal fiber braggs grating is considered as fiber dispersive medium with different dispersion. Numerical simulation depicts that in …

Published in Trends in Opto-electro & Optical Communication · Vol. 6, Issue 2, 2016 · pp. 18–23 Read article

Published Subscription 30 Mar 2019

Simulated Design and Characterization of an Efficient Nd:YAG based Solar Pumped Single Mode Laser

By Md. Arif Abdulla Samy, Ebad Zahir

Abstract: AbstractAs the current solar pumped lasers have shown to yield a very low efficiency, this research explores the possibility of a simulated design which can be more efficient in converting solar energy into optical power. This paper presents the software design of a Neodymium Doped Yttrium Aluminum Garnet (Nd3+:Y3 Al5 O12) Laser using LASCAD and also presents the characterization of the design using a theoretical mathematical model. Overall, results of …

Published in Trends in Opto-electro & Optical Communication · Vol. 5, Issue 3, 2015 · pp. 39–49 Read article