Kovalev Alexey's Books

Vortex Laser Beams

By: Victor V. Kotlyar,Alexey A. Kovalev,Alexey P. Porfirev

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Vortex Laser Beams

By: Victor V. Kotlyar,Alexey A. Kovalev,Alexey P. Porfirev

This book deals with theoretical bases of the modern optics division concerned with coherent light fields with singularities characterized by phase uncertainty. Singular light fields include laser vortex beams or beams that carry orbital angular momentum. Laser vortex beams that have been introduced in optics in recent years are discussed in detail. Among them, of special notice are families of asymmetric laser vortex beams that, while being devoid of radial symmetry, remain unchanged upon propagation. What makes the laser vortex beams especially interesting is the ability to preserve their structure while propagating in a scattering medium or through a turbulent atmosphere. The orbital angular momentum is an extra degree of freedom of laser vortices because beams with different topological charge can be utilized as independent channels for data transmission in wireless communications. Laser vortex beams are generated from conventional Gaussian beams using liquid crystal light modulators, which are now readily available at any optical laboratory. Provide a framework for the comparative analysis of the efficiency of different vortex beams for micromanipulation. Includes detailed illustrations, enabling the vortex structure to be easily understood even by non-experts. Presents detailed descriptions of more than a dozen most popular types of vortex laser beams. Explores how optical vortices have been used in many practical applications including conventional and quantum wireless communications, micromanipulation, optical measurements with super-resolution, spiral interferometry, microscopy, and atom cooling. Presents in a systematic and detailed form many analytical and numerical results for the propagation vortex optical beams (chiefly in the linear propagation regime).

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Page Count

343

Publisher

CRC Press

Published Date

ISBN 10

1351009583

ISBN 13

9781351009584

Topological Charge of Optical Vortices

By: Victor V. Kotlyar,Alexey A. Kovalev,Anton G. Nalimov

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Topological Charge of Optical Vortices

By: Victor V. Kotlyar,Alexey A. Kovalev,Anton G. Nalimov

This book is devoted to the consideration of unusual laser beams – vortex or singular beams. It contains many numerical examples, which clearly show how the phase of optical vortices changes during propagation in free space, and that the topological charge is preserved. Topological Charge of Optical Vortices shows that the topological charge of an optical vortex is equal to the number of screw dislocations or the number of phase singularities in the beam cross-section. A single approach is used for the entire book: based on M. Berry’s formula. It is shown that phase singularities during beam propagation can be displaced to infinity at a speed greater than the speed of light. The uniqueness of the book is that the calculation of the topological charge for scalar light fields is extended to vector fields and is used to calculate the Poincare–Hopf singularity index for vector fields with inhomogeneous linear polarization with V-points and for the singularity index of vector fields with inhomogeneous elliptical polarization with C-points and C- lines. The book is written for opticians, and graduate students interested in an interesting section of optics – singular optics. It will also be of interest to scientists and researchers who are interested in modern optics. In order to understand the content of the book, it is enough to know paraxial optics (Fourier optics) and be able to calculate integrals.

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Page Count

321

Publisher

CRC Press

Published Date

ISBN 10

1000788393

ISBN 13

9781000788396

Vortex Laser Beams

By: Victor V. Kotlyar,Alexey A. Kovalev,Alexey P. Porfirev

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Vortex Laser Beams

By: Victor V. Kotlyar,Alexey A. Kovalev,Alexey P. Porfirev

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Page Count

404

Publisher

CRC Press

Published Date

ISBN 10

1351009591

ISBN 13

9781351009591

Topological Charge of Optical Vortices

By: Victor V. Kotlyar,Alexey A. Kovalev,Anton G. Nalimov

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Topological Charge of Optical Vortices

By: Victor V. Kotlyar,Alexey A. Kovalev,Anton G. Nalimov

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321

Publisher

CRC Press

Published Date

ISBN 10

1000788393

ISBN 13

9781000788396

Home Within a Landscape

By: Alexey L. Kovalev

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Home Within a Landscape

By: Alexey L. Kovalev

With all disagreements and calamities pushing us apart from each other, it seems unachievable to turn things around. If only we could glimpse at what this momentous turn might look like. Maybe it will encourage us enough to pull all our strength and just do it. We might realize that some of our immediate neighbors, unapproachable tycoons and celebrities, most influential politicians, our devoted teachers, war veterans, even foreign monarchs, and the Pope are also striving for this turn. And all it takes is one decisive move. So, let us see how it could unfold and what treasures we will begin uncovering along the way. The United States takes it upon itself to untangle the country from a deadly grip of unresolvable world affairs. It starts practical healing by building a reasonable future and placing its bet on reasonable people in all ways of life. Watch private prison guard teaching an intellectual gay woman from Boston target shooting at local range; meet a gifted biology student from North Korea giving unorthodox analysis of Hamlet; or read personal rendering of the Exodus and American history of slavery in the diary of a suicidal IT specialist. You will see how much more rich in thoughts our souls are, far richer than we expect them to be. After all, if St. Francis could have established peace between villagers and a wolf, nothing is out of our reach in our Home within a Landscape.

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Page Count

332

Publisher

Atmosphere Press

Published Date

ISBN 10

1639881948

ISBN 13

9781639881949

Book's by Kovalev Alexey

Vortex Laser Beams

Vortex Laser Beams

Topological Charge of Optical Vortices

Topological Charge of Optical Vortices

Vortex Laser Beams

Vortex Laser Beams

Topological Charge of Optical Vortices

Topological Charge of Optical Vortices

Home Within a Landscape

Home Within a Landscape

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