Manish Tiwari

Manipal University Jaipur · Electronics & Communication Engineering

This manuscript investigates the mathematical modeling of a silicon nitride-based all-optical BVF reversible gate, and reversible full adder modeled using an optical ring resonator (ORR). The design parameters of the proposed ORR are optimized to implement the desired mathematical model of reversible logic devices for all-optical computing. The tra...

This work presented a Spiral-Shaped SPR-PCF biosensor with a Circular Ring. This work possesses the phase matching condition at 790 nm for the refractive index of analyte ( n a ) is 1.40 having a peak of confinement loss of 2.001553 dB/cm.

A D-shaped PCF-based SPR biosensor design comprising four circular rings of air holes and 90 nm plasmonic gold layer is proposed for precise detection of analyte of specific RI( refractive index) range from 1.33 to 1.48.

This work presents the first instance of a silica few-mode microstructured optical fiber (MOF) being successfully fabricated with a hollow GeO2-doped ring core and by strongly inducing twisting up to 790 revolutions per meter. Some technological issues that occurred during the manufacturing of the GeO2-doped supporting elements for the large hollow...

This work presents first time successfully fabricated silica few-mode microstructured optical fiber (MOF) with hollow GeO2-doped ring core and strongly induced twisting up to 790 revolutions per meter. Some technological issues for manufacturing of GeO2-doped supporting elements for large hollow cores as well as described above complicated spun MOF...

This work presents a fabricated silica few-mode microstructured optical fiber (MOF) with a special six GeO2-doped core geometry, an outer diameter of 125 µm (that corresponds to conventional commercially available telecommunication optical fibers), and improved induced twisting up to 500 revolutions per 1 m (under a rotation speed of 1000 revolutio...

Miniaturized, specific, rapid response and economical biosensors are finding applications in biotechnology, environmental studies, agriculture, food inspection and safety, disease diagnosis and medical utilities. Of the many categories of biosensors, optical biosensors have brought about an extra edge in sensing applications due to their selective,...

This work presents the design and simulation of an all-optical sensor for detection of cancer cells. The proposed device is based on the surface plasmon resonance effect on a spiral shaped photonic crystal fiber structure. The finite element method (FEM) based simulations are carried out for the different cancer cells, such as HELA, Basal, Jurkat,...

This manuscript presents a ring-core Bragg Fiber (RC-BF) for orbital angular momentum (OAM) modes propagation and supercontinuum generation. The proposed RC-BF is composed of alternating layers of soft glasses SF57 and LLF1 to render high nonlinearity to the fiber. Mode analysis using full-vectorial finite element method resulted in obtaining HE/EH...

This paper presents a systematic numerical investigation of a surface plasmon resonance (SPR) sensor based on photonic crystal fiber (PCF). The proposed design is modeled and simulated using the full vectorial finite-element (FV-FEM) technique and sensing characteristics such as confinement loss behaviors, phase matching and sensitivity are investi...

In this work, the design and performance of a circularly polarized (CP) antenna designed using characteristic modal analysis (CMA) for military band application is presented. The substrate used is single-sided glass-reinforced epoxy and the antenna dimensions are 37×37×1.6 mm 3 . The antenna is compact, low-profile, circular polarized having an ARB...

The paper presents the novel all-optical 2x1 and 4x1 reversible multiplexer using the optical microring resonator (OMRR). The numerical modelling of the Silicon Nitride (Si3N4)-based OMRR has been done and employed to design the reversible multiplexers. The proposed reversible multiplexers are validated through MATLAB results. The desired figure of...

Comprises the refereed papers presented during the 2nd Flexible Electronics for Electric Vehicles—FlexEV-2021 Is useful for research scholars, electric vehicles professionals, driving system designers, and postgraduates

In the last few decades, the human body is prone to many different types of infectious diseases. This involves making use of technologies for detecting and monitoring the factors responsible for these diseases, and the devices should be free from any kind of harmful radiations. Photonics is considered to be one of the new advancements in the field...

Recently, millimeter wave radio has drawn in an abundance of revenue from the scholarly community, industry, and ecumenical normalization bodies because of sundry appealing highlights of millimeter wave to give multi-gigabit transmission rate. Apertures for different inventive applications will be made in automotive, medical accommodations, industr...

The Internet of Things (IoT) is a forerunner to the smart world, as it uses ubiquitous computers and networking to simplify and supply other services, such as easy monitoring of many phenomena in our environment. Environmental and everyday goods referred to as things, objects, or machines, are improving with computing and communication technologies...

In the modern wireless communication system high data rates and more bandwidth efficiencies is required. Apertures for different inventive applications will be made in automotive, medical accommodations, industry etc. which is because of the incipient 5G requisites, which recollect 1000× increment for limit and 10× higher data rates, among others....

In this paper, a methodology for designing a metasurface is explained and practically show this by design of unit cell rectangular shape structure. By using multiple unit cell structure can be design metasurface. Metasurface consist of a 40-unit cell structure, each unit cell length and width are 4 × 6 mm and distance from other unit cell in metasu...

Comprises select peer-reviewed proceedings of the international conference OWT 2021 Enriches understanding by including contributions from leading experts across the globe Discusses new theories and applications in the field of optical communication, photonics, wave propagation, etc.

This manuscript reporting a unique Surface Plasmon Resonance (SPR) drew biosensor based on Photonic Crystal Fiber (PCF). The designed sensor can be utilized for the sensing of liquid analyte having a refractive index in range 1.40-1.45.The aforesaid sensor is showing wavelength sensitivity of as high as 37000 nm/RIU. The reported device can be a pr...

Comprises the refereed papers presented on VLSI & Microwave and Wireless Technologies (ICVMWT-2021) Presents extensive reviews highlighting the trends in the emerging fields like wireless communication, etc Brings together an amalgamation of research issues and developments from all corners of the globe

The article analyzes existing materials and structures with quadratic-nonlinear optical properties that can be used to generate a difference frequency in the terahertz and sub-terahertz frequency ranges. The principle of constructing a nonlinear optical-radio converter, based on an optical focon (a focusing cone), is proposed. Based on the assumpti...

This work reports a unique photonic crystal based temperature sensor. The modal analysis of photonic crystal fiber structure for the electric field distribution has been presented for X-polarization and Y-polarization. The coorelation analysis between the effective mode index and temperature has been investigated in the sensor using Comsol Multiphy...

In this paper, we present the results of numerical simulations of Octagonal Photonic Crystal Fiber (O-PCF). The fiber has a ring core made up of Germanium doped silica and cladding is made up of silica glass with aire-holes arranged in octagonal lattice. The O-PCF is capable of propagating 6 OAM modes with highest mode quality-OAM purity equal to 9...

This work presents designed and fabricated silica few-mode optical fiber (FMF) with induced twisting 10 and 66 revolutions per meter, core diameter 11 µm, typical “telecommunication” cladding diameter 125 µm, improved height of quasi-step refractive index profile and numerical aperture 0.22. Proposed FMF supports 4 guided modes over “C”-band. We di...

This work presents results of property researches of fabricated samples of silica few-mode optical fiber (FMF) with induced chirality under twisting 10 and 66 revolutions per meter, core diameter 11 µm, typical “telecommunication” cladding diameter 125 µm and improved height of quasi-step refractive index profile. Proposed FMF supports 4 guided mod...

The article analyzes existing materials and structures with quadratic-nonlinear optical properties that can be used to generate a difference frequency in the terahertz and sub-terahertz frequency ranges. The principle of constructing a nonlinear optical-radio converter, based on an optical focon (a focusing cone), is proposed. Based on the assumpti...

This book comprises select proceedings of the 4th International Conference on Optical and Wireless Technologies (OWT 2020). The contents of this volume focus on research carried out in the areas of Optical Communication, Optoelectronics, Optics, Wireless Communication, Wireless Networks, Sensors, Mobile Communications and Antenna and Wave Propagati...

This work presents a unique snowflake-shaped Photonic Crystal Fiber (PCF) for the propagation of OAM modes. The designed PCF theoretically demonstrated the propagation of 10 OAM modes at the specified wavelength of 1.55µm.

This work proposed a hexagonal spiral PCF based on SPR biosensor. This work report the phase matching resonance condition at 680 nm for the refractive index of 1.39 having confinement loss of 1.92x10 ⁻⁶ dB/cm.

All-optical processors and logic circuits are already doing wonders in the current research technologies. In connection to high-speed processors, this manuscript demonstrates a novel technique to implement an all-optical read-only memory element using an optical microring resonator. In the given article the authors have analysed the numerical model...

This work presents fabricated silica microstructured optical fiber with special equiangular spiral six-ray geometry, an outer diameter of 125 µm (that corresponds to conventional commercially available telecommunication optical fibers of ratified ITU-T recommendations), and induced chirality with twisting of 200 revolutions per minute (or e.g., und...

This work presents results of researhes of fabricated pilot sample of chiral few-mode optical fiber (FMF) with induced twisting of 10 and 66 revolutions per meter, core diameter 11 µm (that almost corresponds to standard singlemode optical fibers), typical “telecommuniction” cladding diameter 125 µm and improved height of step refractive index prof...

Surface Plasmon Resonance (SPR) method is used widely used for sensing due to its high sensitivity. SPR based sensors have many potential applications, such as biological and chemical analyte detection for many diseases, medical diagnostics, and antibody–antigen interaction, etc. Surface Plasmon Resonance (SPR) is an efficient and powerful optical...

Recently, millimeter wave radio has drawn in an abundance of revenue from the scholarly community, industry, and ecumenical normalization bodies because of sundry appealing highlights of millimeter wave to give multi-gigabit transmission rate. Apertures for different inventive applications will be made in automotive, medical accommodations, industr...

In the paper, a spirally filled solid core chalcogenide-based photonic crystal fibre is proposed, which is engineered to obtain a flattened broad anomalous dispersion profile. The spectrum spanning in the wavelength region from 1.5 to 3.6 μm was achieved by pumping hyperbolic secant pulses with a peak power of 350 W and 85 fs pulse duration, at a w...

This volume presents selected papers from the 3rd International Conference on Optical and Wireless Technologies, conducted from 16th to 17th March, 2019. It focuses on extending the limits of currently used systems encompassing optical and wireless domains, and explores the latest developments in applications like photonics, high speed communicatio...

All-optical processor capable of processing optical bits has been a long-standing goal of photonics. In this paper, we report the results obtained by numerical simulations regarding the designing of an all-optical combinational circuit of an adder and subtractor circuits based on Si 3 N 4 microring resonators. The designs of combinational circuit l...

This volume presents selected papers from the 2nd International Conference on Optical and Wireless Technologies, conducted from 10th to 11th February, 2018. It focuses on extending the limits of currently used systems encompassing optical and wireless domains, and explores novel research on wireless and optical techniques and systems, describing pr...

This paper proposes a design and mathematical study of As 2 S 3 chalcogenide photonic crystal fiber (PCF) for broadband supercontinuum generation. The proposed design offers a large nonlinearity coefficient and ultra-flattened dispersion. The proposed design was analyzed using the full-vectorial finite element method. Through this method, it is sho...

In this paper, we have numerically simulated a highly nonlinear multi-material chalcogenide photonic crystal fiber in order to investigate both the linear and the nonlinear parameters for generating a supercontinuum. The photonic crystal fiber is designed with borosilicate and As2S3 glass, where borosilicate is doped in a spiral shape in the claddi...

This book presents selected papers from 1st International Conference on Optical and Wireless Technologies, providing insights into the analytical, experimental, and developmental aspects of systems, techniques, and devices in these spheres. It explores the combined use of various optical and wireless technologies in next-generation networking appli...

In this Letter, we numerically simulate the generation of a 1–15 μm mid-infrared supercontinuum (SC) from a highly nonlinear Ge11.5As24Se64.5-based photonic crystal fiber (PCF). This ultra-broadband SC is achieved in a 100 mm long PCF pumped using 85 fs laser pulses operated at 3.1 μm and a peak pulse power of 3 kW. The proposed design offers a fla...

In this paper, we have numerically investigated a Ge11.5As24Se64.5 based chalcogenide photonic crystal fiber and simulated 1–10 μm mid-infrared supercontinuum generation. This mid-infrared broadband supercontinuum is achieved for 100 mm long photonic crystal fiber pumped with 85 femtosecond laser pulses operated at 3.1 μm and peak power pulse is 3...

We demonstrate numerically a possible generation of a mid-infrared (1–10 µm) supercontinuum, using highly nonlinear Ge11.5As24Se64.5-based photonic crystal fibres. This ultra-broadband supercontinuum is achieved with a 100 mm long photonic crystal fibre pumped using 85 fs laser pulses at 3.1 µm with the peak power 3 kW. A broad and flat dispersion...

In this paper, we have investigated photonic-crystal fibers based on lithium ternary compounds, namely LiGaSe2, LiGaS2, and LiGISe (LiGa0.5In0.5Se2) and characterized them for supercontinuum generation. These highly nonlinear chalcogenide photonic crystal fibers are suitable for supercontinuum generation for pump wavelength at 2.2 µm. We have desig...

We numerically demonstrated that the generation of 1.4–10 µm mid-infrared supercontinuum from highly nonlinear Ge11.5As24Se64.5 based photonic crystal fiber chalcogenide glass. This ultra-broadband supercontinuum achieved for 150 mm long photonic crystal fiber pumped with 85 femto-second laser pulses operated at 3.1 µm and peak power pulse is 5 kW....

We propose a lead silicate all-solid photonic crystal fiber which exhibits enhanced nonlinearity and very flat and near-zero dispersion in anomalous region and is suitable for broadband supercontinuum with 50fs-2kW pulses pumped at 1.55 micrometer.

Simulations are presented of a very broad and flat supercontinuum (SC) in both the normal and anomalous group velocity dispersion regimes of the same equiangular spiral photonic crystal fiber at low pumping powers. For a pump wavelength at 1557 nm and average pump power of 11.2 mW, we obtained a bandwidth >3 μm (970 nm–4100 nm) at 40 dB below the p...

In this paper, we propose a relatively new PCF structure made of silica with a very high nonlinearity i.e. γ~343 W-1 km-1@1060 nm. We have also demonstrated two-octave spanning supercontinuum generation from 500 nm – 1680 nm using 50 fs pulse with peak power of 2 kW.

In this paper, we present the results of a two-octave spanning supercontinuum (1000–3200 nm) generated in a highly nonlinear photonic crystal fiber that can be fabricated using a stack-and-draw process with SF57. The fiber can be pumped at 1.55 μm using a commercially available laser source with an average power of 5 mW. The fiber has two zero disp...

We present results for a broadband supercontinuum spanning almost two octaves (575 nm - 1600 nm) generated in an equiangular spiral photonic crystal fiber proposed earlier. The pump source is taken to be Yb - doped fiber laser at 1.06 mum. The fiber has two zero dispersion wavelength (at 885 nm and 1115 nm) with very high nonlinearity ( >5580 W-1 k...

Supercontinuum is said to have generated when several nonlinear effects like self - phase modulation, cross -phase modulation, four - wave mixing, stimulated Raman scattering etc. lead to extreme spectral broadening of ultrashort optical pulses. In this paper, we have numerically demonstrated the effect of variation in the wavelength of optical pul...