Ajoy Ghatak's Books

Lagrangian Optics

By: V. Lakshminarayanan,Ajoy Ghatak,K. Thyagarajan

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Lagrangian Optics

By: V. Lakshminarayanan,Ajoy Ghatak,K. Thyagarajan

Ingeometrical optics, light propagation is analyzed in terms of light rays which define the path of propagation of light energy in the limitofthe optical wavelength tending to zero. Many features oflight propagation can be analyzed in terms ofrays,ofcourse, subtle effects near foci, caustics or turning points would need an analysis based on the wave natureoflight. Allofgeometric optics can be derived from Fermat's principle which is an extremum principle. The counterpart in classical mechanics is of course Hamilton's principle. There is a very close analogy between mechanics ofparticles and optics oflight rays. Much insight (and useful results) can be obtained by analyzing these analogies. Asnoted by H. Goldstein in his book Classical Mechanics (Addison Wesley, Cambridge, MA, 1956), classical mechanics is only a geometrical optics approximation to a wave theory! In this book we begin with Fermat's principle and obtain the Lagrangian and Hamiltonian pictures of ray propagation through various media. Given the current interest and activity in optical fibers and optical communication, analysis of light propagation in inhomogeneous media is dealt with in great detail. The past decade has witnessed great advances in adaptive optics and compensation for optical aberrations. The formalism described herein can be used to calculate aberrations ofoptical systems. Toward the end of the book, we present application of the formalism to current research problems. Of particular interest is the use of dynamic programming techniques which can be used to handle variational/extremum problems. This method has only recently been applied to opticalproblems.

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Page Count

242

Publisher

Springer Science & Business Media

Published Date

ISBN 10

0792375823

ISBN 13

9780792375821

Fiber Optic Essentials

By: K. S. Thyagarajan,Ajoy Ghatak

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Fiber Optic Essentials

By: K. S. Thyagarajan,Ajoy Ghatak

Fiber Optic Essentials starts with a basic discussion on lightwaves and the phenomenon of refraction and reflection. It then goes on to introduces the reader to the field of fiber optics and covers some of the recent developments, such as fiber amplifiers, dispersion compensation and nonlinear effects. A number of other applications are also presented. Examples and comparison with everyday experience are provided wherever possible to help the reader's comprehension. Diagrams are also included to aid in the visualization of certain concepts.

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Page Count

260

Publisher

John Wiley & Sons

Published Date

ISBN 10

0470152559

ISBN 13

9780470152553

Quantum Mechanics: Theory and Applications

By: Ajoy Ghatak,S. Lokanathan

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Quantum Mechanics: Theory and Applications

By: Ajoy Ghatak,S. Lokanathan

An understanding of quantum mechanics is vital to all students of physics, chemistry and electrical engineering, but requires a lot of mathematical concepts, the details of which are given with great clarity in this book. Various concepts have been derived from first principles, so it can also be used for self-study. The chapters on the JWKB approximation, time-independent perturbation theory and effects of magnetic field stand out for their clarity and easy-to-understand mathematics. Two complete chapters on the linear harmonic oscillator provide a very detailed discussion of one of the most fundamental problems in quantum mechanics. Operator algebra is used to show the ease with which one can calculate the harmonic oscillator wave functions and study the evolution of the coherent state. Similarly, three chapters on angular momentum give a detailed account of this important problem. Perhaps the most attractive feature of the book is the excellent balance between theory and applications and the large number of applications in such diverse areas as astrophysics, nuclear physics, atomic and molecular spectroscopy, solid-state physics, and quantum well structures.

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Page Count

906

Publisher

Springer Science & Business Media

Published Date

ISBN 10

1402021305

ISBN 13

9781402021305

Fundamentals Of Equations Of State

By: Shalom Eliezer,Ajoy Ghatak,Heinrich Hora

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Fundamentals Of Equations Of State

By: Shalom Eliezer,Ajoy Ghatak,Heinrich Hora

The equation of state was originally developed for ideal gases, and proved central to the development of early molecular and atomic physics. Increasingly sophisticated equations of state have been developed to take into account molecular interactions, quantization, relativistic effects, etc.Extreme conditions of matter are encountered both in nature and in the laboratory, for example in the centres of stars, in relativistic collisions of heavy nuclei, in inertial confinement fusion (where a temperature of 109 K and a pressure exceeding a billion atmospheres can be achieved). A sound knowledge of the equation of state is a prerequisite for understanding processes at very high temperatures and pressures, as noted in some recent developments.This book presents a detailed pedagogical account of the equation of state and its applications in several important and fast-growing topics in theoretical physics, chemistry and engineering.

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Page Count

386

Publisher

World Scientific

Published Date

ISBN 10

9814489530

ISBN 13

9789814489539

An Introduction to Fiber Optics

By: Ajoy K. Ghatak,K. Thyagarajan

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An Introduction to Fiber Optics

By: Ajoy K. Ghatak,K. Thyagarajan

Textbook on the physical principles of optical fibers - for advanced undergraduates and graduates in physics or electrical engineering.

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Page Count

588

Publisher

Cambridge University Press

Published Date

ISBN 10

0521577853

ISBN 13

9780521577854

Sustainable Entrepreneurship

Innovation and Transformation

By: Ajoy Kumar Dey

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Sustainable Entrepreneurship

Innovation and Transformation

By: Ajoy Kumar Dey

The cases contribute to the understanding of a systemic change from a linear economy to a circular economy and how businesses and organisations can transform their businesses and practices towards a sustainable future through innovations and creating sustainable business opportunities. Sustainable and social aspects of the cases within the organisation and with the stakeholders draw a clear picture of staying competitive, profitable and show the ability to create sustainable value. The cases provide insight into different cultural and societal aspects in the ever-changing business environment by creating an understanding of the circular economy, social entrepreneurship, and competitive leadership, and effective performance.

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Page Count

353

Publisher

Bloomsbury Publishing

Published Date

ISBN 10

9354350550

ISBN 13

9789354350559

An Introduction to Fiber Optics

By: Ajoy K. Ghatak,K. Thyagarajan

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An Introduction to Fiber Optics

By: Ajoy K. Ghatak,K. Thyagarajan

Textbook on the physical principles of optical fibers - for advanced undergraduates and graduates in physics or electrical engineering.

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588

Publisher

Cambridge University Press

Published Date

ISBN 10

0521577853

ISBN 13

9780521577854

Lasers

Fundamentals and Applications

By: K. Thyagarajan,Ajoy Ghatak

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Lasers

Fundamentals and Applications

By: K. Thyagarajan,Ajoy Ghatak

Ever since their invention in 1960, lasers have assumed tremendous importance in the fields of science, engineering and technology because of their use both in basic research and in various technological applications. Lasers: Theory and Applications 2nd Edition will provide a coherent presentation of the basic physics behind the working of the laser along with some of their most important applications. Numerical examples are scattered throughout the book for helping the student gain a better appreciation of the concepts and problems at the end of each chapter and provides the student a better understanding of the basics and help in applying the concepts to practical situations. This book serves as a text in a course on lasers and their applications for students majoring in various disciplines such as Physics, Chemistry and Electrical Engineering.

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Page Count

648

Publisher

Springer Science & Business Media

Published Date

ISBN 10

1441964428

ISBN 13

9781441964427

Fiber Optic Essentials

By: K. S. Thyagarajan,Ajoy Ghatak

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Fiber Optic Essentials

By: K. S. Thyagarajan,Ajoy Ghatak

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Page Count

260

Publisher

John Wiley & Sons

Published Date

ISBN 10

0470152559

ISBN 13

9780470152553

Fiber Optics And Lasers : The Two Revolutions

By: Ajoy Ghatak,K Thyagarajan

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Fiber Optics And Lasers : The Two Revolutions

By: Ajoy Ghatak,K Thyagarajan

The invention of the laser in 1960 provided mankind with a unique source of light, which is highly directional, spectrally pure and extremely bright. The development of such a unique source of light ushered in a large number of applications in many diverse areas such as communications, medicine, defence, etc. Besides, lasers have found numerous commercial uses and the number of such applications is still rising. Today, light wave communication using hair-thin optical fibers of glass has truly revolutionised communication and has been primarily responsible for the Internet explosion. Salient Features " An introductory, easy-to-understand and purely non-mathematical text "Covers state-of-the-art developments in the field of fiber optics - fiber amplifiers, dispersion compensation and non-linear effects "Discusses basics of lasers with emphasis on special properties and applications "Adopts an application-oriented approach applications explained with interesting illustrations "Provides examples and comparisons from day-to-day experience, wherever feasible, to make readers understand by correlation of known facts The book is designed to serve as a popular reference on fiber optics and lasers. It will not only interest general readers and students, but will also serve as a useful reference to working professionals in the field of lasers and fiber-optic communication system.

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Page Count

248

Publisher

Macmillan

Published Date

ISBN 10

1403930112

ISBN 13

9781403930118

Lagrangian Optics

By: V. Lakshminarayanan,Ajoy Ghatak,K. Thyagarajan

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Lagrangian Optics

By: V. Lakshminarayanan,Ajoy Ghatak,K. Thyagarajan

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Page Count

227

Publisher

Springer

Published Date

ISBN 10

1461517125

ISBN 13

9781461517122

Optical Electronics

By: Ajoy Kumar Ghatak,K. Thyagarajan

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Optical Electronics

By: Ajoy Kumar Ghatak,K. Thyagarajan

Intended for senior undergraduate students, a comprehensive account of optical electronics includes the basic principles concerning electromagnetic waves, laser theory, optical wave guides, fiber and integrated optics.

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Page Count

644

Publisher

Cambridge University Press

Published Date

ISBN 10

0521314089

ISBN 13

9780521314084

Quantum Mechanics:Theory and Applications

By: Ajoy K. Ghatak,S. Lokanathan

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Quantum Mechanics:Theory and Applications

By: Ajoy K. Ghatak,S. Lokanathan

This is the new edition of the best selling textbook on Quantum Mechanics. It presents the basic concepts in quantum mechanics with emphasis on applications in areas like nuclear physics, astrophysics, solid-state physics, quantum optics, and so on. Each

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Page Count

800

Publisher

Macmillan

Published Date

ISBN 10

1403923418

ISBN 13

9781403923417

Inhomogeneous Optical Waveguides

By: Ajoy Ghatak

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Inhomogeneous Optical Waveguides

By: Ajoy Ghatak

The propagation of electromagnetic waves in "square-law" media, i.e., media characterized by a quadratic spatial variation of the dielectric constant, has been a favorite subject of investigation in electromagnetic theory. However, with the recent fabrication of glass fibers with a quadratic radial variation of the dielectric constant and the application of such fibers to optical imaging and communications, this subject has also assumed practical importance. Comparison of experimental results on propagation, resolu tion, and pulse distortion in such inhomogeneous waveguides with theory has put the field on a sound base and spurred further work. The present book aims at presenting a unified view of important aspects of our knowledge of inhomogeneous optical waveguides. A brief discussion of homogeneous dielectric waveguides is unavoidable, since itforms a basis for the appreciation of inhomogeneous waveguides. A short course based on some chapters of this book was offered to graduate students at IIT Delhi and was well received. We consider that despite the unavoidable mathemati cal nature of the present book, the comparison of experimental results with theory throughout and the description of fabrication technology (Appen dixes A and B) should make its appeal universal. The authors are grateful to Dr. K. Thyagarajan for writing most of Chapter 9 and to their colleagues Dr. I. C. Goyal, Dr. B. P. Pal, and Dr. A.

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Page Count

269

Publisher

Springer

Published Date

ISBN 10

1461587638

ISBN 13

9781461587637

Contemporary Optics

By: Ajoy Ghatak

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Contemporary Optics

By: Ajoy Ghatak

With the advent of lasers, numerous applications of it such as optical information processing, holography, and optical communication have evolved. These applications have made the study of optics essential for scientists and engineers. The present volume, intended for senior under graduate and first-year graduate students, introduces basic concepts neces sary for an understanding of many of these applications. The book has grown out of lectures given at the Master's level to students of applied optics at the Indian Institute of Technology, New Delhi. Chapters 1-3 deal with geometrical optics, where we develop the theory behind the tracing of rays and calculation of aberrations. The formulas for aberrations are derived from first principles. We use the method in volving Luneburg's treatment starting from Hamilton's equations since we believe that this method is easy to understand. Chapters 4--8 discuss the more important aspects of contemporary physical optics, namely, diffraction, coherence, Fourier optics, and holog raphy. The basis for discussion is the scalar wave equation. A number of applications of spatial frequency filtering and holography are also discussed. With the availability of high-power laser beams, a large number of nonlinear optical phenomena have been studied. Of the various nonlinear phenomena, the self-focusing (or defocusing) of light beams due to the nonlinear dependence of the dielectric constant on intensity has received considerable attention. In Chapter 9 we discuss in detail the steady-state self-focusing of light beams.

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Page Count

370

Publisher

Springer

Published Date

ISBN 10

1468423592

ISBN 13

9781468423594

Albert Einstein

A Glimpse of His Life, Philosophy and Science

By: Ajoy K. Ghatak

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Albert Einstein

A Glimpse of His Life, Philosophy and Science

By: Ajoy K. Ghatak

Albert Einstein, 1879-1955, German theoretical physicist and Nobel Prize laureate.

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Page Count

209

Published Date

ISBN 10

8130917467

ISBN 13

9788130917467

Book's by Ajoy Ghatak

Lagrangian Optics

Lagrangian Optics

Fiber Optic Essentials

Fiber Optic Essentials

Quantum Mechanics: Theory and Applications

Quantum Mechanics: Theory and Applications

Fundamentals Of Equations Of State

Fundamentals Of Equations Of State

An Introduction to Fiber Optics

An Introduction to Fiber Optics

Sustainable Entrepreneurship

Sustainable Entrepreneurship

An Introduction to Fiber Optics

An Introduction to Fiber Optics

Lasers

Lasers

Fiber Optic Essentials

Fiber Optic Essentials

Fiber Optics And Lasers : The Two Revolutions

Fiber Optics And Lasers : The Two Revolutions

Lagrangian Optics

Lagrangian Optics

Optical Electronics

Optical Electronics

Quantum Mechanics:Theory and Applications

Quantum Mechanics:Theory and Applications

Inhomogeneous Optical Waveguides

Inhomogeneous Optical Waveguides

Contemporary Optics

Contemporary Optics

Albert Einstein

Albert Einstein

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