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Design and Modeling of Optical Fibers for Spatial Division Multiplexing Using the Orbital Angular Momentum of Light

Design and Modeling of Optical Fibers for Spatial Division Multiplexing Using the Orbital Angular Momentum of Light
Author: Charles Brunet
Publisher:
Total Pages: 155
Release: 2016
Genre:
ISBN:
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The always increasing need for digital data bandwidth pushes the development of emerging technologies to increase network capacity, especially for optical fiber infrastructures. Among those technologies, spatial multiplexing is a promising way to multiply the capacity of current optical links. In this thesis, we are particularly interested in current spatial multiplexing using the orbital angular momentum of light as an orthogonal basis to distinguish between a few optical channels. We first introduce notions from electromagnetism and physic needed for the understanding of the later developments. We derive Maxwell's equations describing scalar and vector modes of optical fiber. We also present other modal properties like mode cutoff, group index, and dispersion. Orbital angular momentum is briefly explained, with emphasis on its applications to optical communications. In the second part, we propose the modal map as a tool that can help in the design of few mode fibers. We develop the vectorial solution of the ring-core fiber cutoff equation, then we extend those equations to all varieties of three-layer fiber profiles. Finally, we give some examples of the use of the modal map. In the third part of this thesis, we propose few fiber designs for the transmission of modes with an orbital angular momentum. The tools that were developed in the second part of this thesis are now used in the design process of those fibers. A first fiber design, characterized by a hollow center, is studied and demonstrated. Then a second design, a family of ring-core fibers, is studied. Effective indexes and group indexes are measured on the fabricated fibers, and compared to numerical simulations. The tools and the fibers developed in this thesis allowed a deeper comprehension of the transmission of orbital angular momentum modes in fiber. We hope that those achievements will help in the development of next generation optical communication systems using spatial multiplexing.

Optical Fiber Multiplexing and Emerging Techniques

Optical Fiber Multiplexing and Emerging Techniques
Author: Syed H Murshid
Publisher: Morgan & Claypool Publishers
Total Pages: 134
Release: 2018-10-01
Genre: Science
ISBN: 1681745690
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This book begins with the history and fundamentals of optical fiber communications. Then, briefly introduces existing optical multiplexing techniques and finally focuses on spatial domain multiplexing (SDM), aka space division multiplexing, and orbital angular momentum of photon based multiplexing. These are two emerging multiplexing techniques that have added two new degrees of photon freedom to optical fibers.

Optical Network Design and Modeling

Optical Network Design and Modeling
Author: Anna Tzanakaki
Publisher: Springer Nature
Total Pages: 661
Release: 2020-02-15
Genre: Computers
ISBN: 3030380858
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This book constitutes the refereed proceedings of the 23rd International IFIP conference on Optical Network Design and Modeling, ONDM 2019, held in Athens, Greece, in May 2019. The 39 revised full papers were carefully reviewed and selected from 87 submissions. The papers focus on cutting-edge research in established areas of optical networking as well as their adoption in support of a wide variety of new services and applications. This involves the most recent trends in networking including 5G and beyond, big data and network data analytics, cloud/edge computing, autonomic networking, artificial intelligence assisted networks, secure and resilient networks, that drive the need for increased capacity, efficiency, exibility and adaptability in the functions that the network can perform. In this context new disaggregated optical network architectures were discussed, exploiting and integrating novel multidimensional photonic technology solutions as well as adopting open hardware and software platforms relying on software defined networking (SDN), and network function virtualization (NFV) to allow support of new business models and opportunities.

Optical Fiber Telecommunications VIA

Optical Fiber Telecommunications VIA
Author: David W. Peckham
Publisher: Elsevier Inc. Chapters
Total Pages: 62
Release: 2013-05-03
Genre: Technology & Engineering
ISBN: 012806062X
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This chapter gives an overview of design and optimization of few-mode optical fibers (FMF) for space-division multiplexed transmission. The design criteria are outlined, along with performance limitations of the traditional step-profile and graded-index profiles. The trade-offs between number of usable optical modes (related to total channel capacity), differential group delay, differential mode attenuation, mode coupling, and the impact on MIMO (multiple-input and multiple-output) receiver complexity are outlined. Improved fiber designs are analyzed which maximize channel capacity with foreseeable next-generation receiver technology. FMF measurement technology is overviewed.

Springer Handbook of Optical Networks

Springer Handbook of Optical Networks
Author: Biswanath Mukherjee
Publisher: Springer Nature
Total Pages: 1169
Release: 2020-10-15
Genre: Technology & Engineering
ISBN: 3030162508
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This handbook is an authoritative, comprehensive reference on optical networks, the backbone of today’s communication and information society. The book reviews the many underlying technologies that enable the global optical communications infrastructure, but also explains current research trends targeted towards continued capacity scaling and enhanced networking flexibility in support of an unabated traffic growth fueled by ever-emerging new applications. The book is divided into four parts: Optical Subsystems for Transmission and Switching, Core Networks, Datacenter and Super-Computer Networking, and Optical Access and Wireless Networks. Each chapter is written by world-renown experts that represent academia, industry, and international government and regulatory agencies. Every chapter provides a complete picture of its field, from entry-level information to a snapshot of the respective state-of-the-art technologies to emerging research trends, providing something useful for the novice who wants to get familiar with the field to the expert who wants to get a concise view of future trends.

Twisted Photons

Twisted Photons
Author: Juan P. Torres
Publisher: John Wiley & Sons
Total Pages: 393
Release: 2011-03-31
Genre: Science
ISBN: 3527635378
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This book deals with applications in several areas of science and technology that make use of light which carries orbital angular momentum. In most practical scenarios, the angular momentum can be decomposed into two independent contributions: the spin angular momentum and the orbital angular momentum. The orbital contribution affords a fundamentally new degree of freedom, with fascinating and wide-spread applications. Unlike spin angular momentum, which is associated with the polarization of light, the orbital angular momentum arises as a consequence of the spatial distribution of the intensity and phase of an optical field, even down to the single photon limit. Researchers have begun to appreciate its implications for our understanding of the ways in which light and matter can interact, and its practical potential in different areas of science and technology.

Metasurface Holography

Metasurface Holography
Author: Zi-Lan Deng
Publisher: Springer Nature
Total Pages: 68
Release: 2022-05-31
Genre: Science
ISBN: 3031023862
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The merging of metasurface and holography brings about unprecedented opportunities for versatile manipulation of light in terms of both far-field wavefront and near-field profile. In this book, a brief evolving history from surface plasmon polariton holography to metamaterial holography and finally to metasurface holography is introduced at first. Basic physical mechanisms that govern the phase modulation rules behind metasurface holography design are discussed later. Next, extended functionalities such as arbitrary polarization holography, vectorial holography, full-color holography, and hybrid holography achieved in the metasurface platform are presented. Surface wave and metagrating holography that bridges the on-chip surface wave and free-space wave is also introduced. In the end, we envisage practical applications of high-fidelity 3D holographic display, high-secure encryption, and high capacity digital encoding and also indicate remaining challenges based on metasurface holography.

Specialty Optical Fibers

Specialty Optical Fibers
Author: Mário Fernando Santos Ferreira
Publisher: Elsevier
Total Pages: 541
Release: 2024-02-17
Genre: Technology & Engineering
ISBN: 0443184941
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Specialty Optical Fibers reviews theoretical and experimental photonic research relevant to the synthesis, processing, characterization, modeling, physical features, and applications of Specialty Optical Fibers (SOFs) with significant technological impact potential. All fiber-based advanced photonics device components rely on specialty optical fibers, which have either a unique waveguide structure or a novel material composition. High power optical amplifiers, high power fiber, and novel fabrication techniques for optical fiber design have enabled significant technological advances. The book provides discussion on these applications including current research directions, future opportunities and remaining challenges.Specialty Optical Fibers is suitable for researchers in academia and practitioners in R&D working in the subject areas of materials science, electrical engineering, and fiber optics. Includes an overview of specialty optical fiber materials design and fabrication technologies Reviews fundamentals of the most relevant optical fiber materials, including their physics, chemistry, and optoelectronics principles Explores current research directions and future opportunities and challenges of utilization of optical fibers for a wide range of diverse applications

Light Waves and Data Streams: A Comprehensive Guide to Fiber Optic Communication

Light Waves and Data Streams: A Comprehensive Guide to Fiber Optic Communication
Author: Ayman Elmassarawy
Publisher: Ayman Elmassarawy
Total Pages: 421
Release: 2024-03-13
Genre: Technology & Engineering
ISBN:
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This book delves into the fascinating world of fiber optic cables, the unsung heroes of today's information age. It takes you on a comprehensive journey, exploring the intricate characteristics of these cables and their transformative role in communication networks, particularly within data centers and mobile technologies. The book provides a comprehensive exploration of fiber optic cables, with a focus on their design, operation, and impact on communication networks. It delves into the fundamental principles of light propagation in optical fibers and covers a range of topics, from the physics of light to the advantages of optical fibers in communication networks. It also addresses the challenges and opportunities presented by different types of optical fibers and their applications in modern technologies. Chapter 1 delves into the comprehensive exploration of optical fiber technology. It covers the foundational principles of optical fiber structures and light guiding principles, the evolution of the technology, the superiority of fiber optic communication systems over traditional copper-based systems, specialty optical fibers, and their unique applications, and the transformative impact of optical fiber technologies on communication networks. Chapter 2 delves into the physics of light propagation in optical fibers. It explores the concept of light from both wave and ray perspectives, gaining a deeper understanding of its behavior. The chapter also covers the crucial role of the refractive index and reflection coefficient in guiding light through the fiber core, as well as the intricacies of light propagation as it interacts with varying refractive indices within the fiber. Chapter 3 focuses on the challenges encountered during light propagation in optical fibers. It includes a comprehensive examination of the fiber optic cable structure, exploring its various components. The chapter also explores the intricacies of a fiber optic communication system, with a particular focus on the crucial role of Total Internal Reflection in guiding light along the desired path, and the concept of attenuation, a primary challenge in fiber optic communication, and how it affects signal strength. Chapter 4 takes a closer look at the design, protection, and environment-specific solutions employed in fiber optic cables. It offers a scientific exploration of fiber optic cable design, analyzing the different components and their contributions to overall functionality. The chapter also provides a detailed focus on outdoor cables, fiber optic connectors, the intricate details of fiber optic connectors, highlighting the importance of precision engineering, durable materials, tools, and splicing equipment for fiber optic network installation and maintenance. Chapter 5 introduces the essential elements of a fiber optic communication system – the light sources and detectors. The chapter provides a foundational overview of different fiber optic cable categories and dives into the concept of refractive index profiles and its crucial role in determining light propagation characteristics. It also explores the underlying principles of light emission, the role of energy bands, and the fundamental differences between LEDs and lasers, as well as an in-depth analysis of edge-emitting, including their quantum efficiency and light generation mechanisms and scientific breakdown of Laser Diodes and Avalanche Photodiodes. Chapter 6 delves into the realm of Dense Wave Division Multiplexing (DWDM), a revolutionary technology that has significantly increased the capacity of fiber optic communication networks. The chapter offers a clear introduction to the concept of WDM and its relationship with the structure of optical fibers. It also explores various passive and active optical components, the science behind active optical components, fiber optic transmission systems, and microwave over fiber optics links, and the key technologies driving DWDM advancements.