Top Research Papers on Optical Fiber Communication

Optical splicing is regarded as the optical “welding” to combine two or more optical fiber to perform specific functions in modern optical telecommunication systems. In this paper, two crucial parameters in evaluating optical splicing; arc power and arc duration, are optimized for optical fiber splicing. Arc power of 32757 and arc duration of 12000 ms both yielded 0.01 dB splice loss while splicing 9/125 um FC optical fibers. Higher arc power and longer arc duration are found to yield lower splice loss. This paper has laid out optical fiber splicing optimizations and splicing strategies to be ...

An optical fiber communication device comprises: a modulator, a coupler, and an electronic-to-optical converter. The modulator can modulate N different digital streaming signals respectively onto N radio frequency carrier waves of different frequencies to generate N (N2) modulation signals of different frequencies. The coupler is coupled with the modulator to receive the modulation signals and combine the modulation signals into a combined signal with N components of different frequencies. The electronic-to-optical converter is coupled with the coupler to receive the combined signal and conver...

This paper introduces some optimization methods that had been done in the teaching process of optical fiber communications course and shows that the experiments show that the teaching goal is reached more quickly.

Some experience of fiber-optical communication teachers was summarized as followed: exciting interesting and cultivating a taste of profession, encouraging students' thinking and establishing a good relationship between teachers and students, optimizing learning mode and improving the method of examination and evaluation.

The results showed that when using the modernized fiber optic link, the sensitivity of the receiving path does not increase, and the dependence of the tangential sensitivity on the frequency of the received microwave signal was investigated.

The present invention discloses an optical fiber comprising a core and a cladding surrounding the core portion. Scattering at the wavelength of 1550nm is equal to the absolute value or more at 4ps / nm / km and less than or equal to 10ps / nm / km; dispersion slope at a wavelength of 1550 nm less than or equal to the absolute value of 0.04ps / nm 2 / km; an effective area at a wavelength of 1550 nanometers is equal to or more than 40μm 2 , and the transmission loss at a wavelength of 1550 nm is equal to or less than 0.205dB / km .

This text provides an introduction to analog modulation, digital fibre optic system design, baseband coding for fibre optics, digital video transmission in optical fibre networks, optical receivers and more.

New ideas for interactions and particles: This paper examines the possibility to origin the Spontaneously Broken Symmetries from the Planck Distribution Law. This way we get a Unification of the Strong, Electromagnetic, and Weak Interactions from the interference occurrences of oscillators. Understanding that the relativistic mass change is the result of the magnetic induction we arrive to the conclusion that the Gravitational Force is also based on the electromagnetic forces, getting a Unified Relativistic Quantum Theory of all 4 Interactions.

This study is used in which each information carrier has a bandwidth capable of carrying large volume of communication traffic. The invention of LASER in 1960 resulted in acceleration of optical communication; optical wave provides such a large hand width that it becomes almost impossible to use it fully. Biopic has become steadily used for high data rate and long distance communication backbone in the 21st century. Optical fibers consist of thin able-like structure protected from environmental chemical damages. Fibers makes use of the principle in physics known as Total Income of the optical ...

Fiber Optic Communications Systems, Modulation, Multiplexing and Network Architecture, and other Lightwave Communications Applications.

An overview of fiber optic communication systems including their key technologies, and also discusses their technological trend towards the next generation are given.

Preface. 1. Fiber Optic Communications Systems. 2. Optics Review. 3. Lightwave Fundamentals. 4. Integrated Optic Waveguides. 5. Optic Fiber Waveguides. 6. Optical Sources and Amplifiers. 7. Light Detectors. 8. Couplers and Connectors. 9. Distribution Networks and Fiber Components. 10. Modulation. 11. Noise and Detection. 12. System Design. Bibliography. Answers. Index.

Optical fibers are used extensively for data transmission systems because of their dielectric nature and their large information-carrying capacity. Network architectures using multiple wavelength channels per optical fiber are utilized in local, metropolitan, or wide-area applications to connect thousands of users having a wide range of transmission capacities and speeds. A powerful aspect of an optical communication link is that many different wavelengths can be sent along a fiber simultaneously in the 1300-to-1600- nm spectrum. The technology of combining a number of wavelengths onto the sam...

SystemsOPTICAL COMMUNICATION AND NETWORKSOptical Fiber Communication SIEOptical CommunicationsPractical Fiber mathematical analysis of optical fiber operation, optical sources and optical detectors. The book also lucidly explains the basic principles of optical communication system and gives a clear insight into transmitters and receivers, design of optical communication system, opto-digital transmission system, voice transmission through fiber optic communication, video transmission over fiber optic links and optical network. The main objective is to provide a thorough understanding of the pr...

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As new processes become available and record lows in fiber loss are being reached, propagation theory is finding new challenges as well and multimode fibers seem desirable with respect to transmitter compatibility, splicing, and fabrication tolerances.

Provided is an optical fiber which has exceptional heat resistance and is highly safe. This optical fiber has a core, and a sheath of a least one layer around the outside circumference of the core, the sheath including a polymer that contains a repeating unit (A) derived from a fluoroalkyl (meth)acrylate having a specific structure.

Introduction An optital detector is a device that converts light signals into electrical signals, which can then be amplified and processed. Such detectors are one of the most important components of an optical fiber communcation system and dictate the performance of a fiber optic communication link. There are many different types of photodetectors such as photomultiplier tubes, vacuum photodiodes, pyroelectric detectors, and semiconductor photodiodes. Semiconductor photodiodes are the most commonly used detectors in optical fiber systems since they provide good performance, are compatible wit...

This note presents an introduction to the principles of fiber optics. Its purpose is to review some basic concepts from physics that relate to fiber optics and the application of semiconductor devices to the generation and detection of light transmitted by optical fibers. The discussion begins with a description of a fiber optic link and the inherent advantages offiber optics over wired systems.

Introduction The most important and widely exploited application of optical fiber is its use as the transmission medium in an optical communication link. The basic optical fiber communication system consists of a transmitter, an optical fiber, and a receiver. The transmitter has a light source, such as a laser diode, which is modulated by a suitable drive circuit in accordance with the signal to be transmitted. Similarly, the receiver consists of a photodetector, which generates electrical signals in accordance with the incident optical energy. The photodetector is followed by an electronic am...

The utility model relates to an optical isolator for fiber-optic communication, which is characterized in that a positive polarization state control component, an insulator component and a negative polarization state control component are parallelly arranged along a light transmission direction in turn.The positive polarization state control component is comprised of a first linear polarizer and a first quarter wave plate, which are parallelly arranged along the light transmission direction in turn.The isolator component is comprised of a first high-reflectivity reflector, a Faraday rotator, a...

A light signal propagating in an optical fiber is subject to a variety of ways in which it can get distorted. Many of these are based on different propagation velocities for different parts of the signal, resulting in dispersion. After such distortion, there is a risk that the signal arrives at the receiver in such a mangled form that it may be impossible to correctly decipher it. In this paper a novel approach for optimized dispersion using different refractive index profiles have been clearly described.

an indication of how often data has to be retransmitted because of an error. The different modulation techniques scheme is suggested for improvement of BER in fiber optic communications. The developed scheme has been tested on optical fiber systems operating with a non-return-to-zero (NRZ) format at transmission rates of up to 10Gbps. Performance of improved detected signals has been evaluated by the analysis of quality factor and computed BER. Numerical simulations have shown a noticeable improvement of the system BER after implementation of the suggested processing operation on the detected ...

On the basis of experience of experimental teaching and present experimental instrument for optical fiber communication,we discussed the teaching method,experiment content,and exam from many aspects,such as finishing fundamental experiment,insisting systemic experiment,increasing innovation experiment and simulation.The experiment teaching provides a useful reference for the reform.

Performance of improved detected signals has been evaluated by the analysis of quality factor and computed BER and noticeable improvement can be seen in the Numerical simulations of the system BER after implementation of the suggested processing operation on the detected electrical signals.

The task of optimization fibre optic systems of connection (FOSC) can be considered as the task of a choice unique (sole) by best in any sense of alternative from an admissible set. If quality or usefulness are measured with the help of known scalar function, methodological problems then ranking is produced, i.e. the separation is especially important, important and such, which role is possible to neglect. Certainly, choice of weight of this or that criterion of optimization is a problem, which can not be posed and solved with a full determinancy.

A new method of optimal coding optimizing communication process is presented, using optimized coding mechanism of constructing multiple virtual private network,virtual private network replacing hardware equipment, to realize long distance transmission of the data in the optical access network.

It is shown, theoretically and experimentally, that the mismatch of the output-fiber mode profile and the switched optical beam shape depends significantly on the monochromaticity of the light beam and is determined by the frequency dispersion of the laser beam diffracted on a Bragg AO cell.

The optical fiber structure and the operation mechanism for multimode and single modes are analyzed and the design parameters such as core radius, numerical aperture, attenuation, dispersion and information capacity for step index and graded index fibers are studied, calculated and compared for different light sources.

This book describes the development of Fiber-Optic Communication Standards Index, a system for cataloging and rating the properties of fibers and their properties as well as some of the techniques used to fabricate these standards.

The Review begins with brief highlights of the history of fiber optics, followed by a discussion of the attributes of shortwave and longwave transmission. This leads to an investigation of various fiber types, short-haul considerations, and then single-mode aspects. Specialty fiber is briefly covered, followed by a survey of several research trends today that will lead to new systems capabilities in the future. No references are given, since hundreds would be necessary to make the list even partially complete.

Abstract: This study shows an easy and effective design of an optical fiber communication system, which demonstrates EDFA's ideal position in the whole system. In recent years, erbium-doped fiber amplifiers (EDFAs) have been more attentive with the development of high-speed and long-distance data transmission systems. In our research, EDFA's forward pump capacity is maintained at 100mW, and our three configurations modify and analyze the location of EDFA. First configuration is meant to place EDFA before optical fiber in the entire system. The second arrangement has been intended such that EDF...

Various existing and future technologies that enable optical networking and make them promising candidates for the backbone of the Internet are discussed.

This review paper describes the status of optical fiber technology in Canada and describes the work on optimized, compatible components and initial system studies that have led to several experimental trial systems.

On the basis of review of recent status of polymethyl methacrylate (PMMA) and perfluorinated (PF) polymer core plastic optical fiber (POF),the transmission systems of POF as well as related components and applications are evaluated in this paper.

Glass optical waveguides with attenuations below 20 dB/km have made possible a new approach to optical communications. These glass fibers satisfy requirements for transmission over kilometer lengths with experimental systems utilizing existing devices for sources and detectors. The realization of material and fabrication advances necessary for this accomplishment are the topic of this paper. Basic theoretical principles are introduced in a review fashion. The application of these principles in choice of materials and fabrication is described. Results in fiber performance following this framewo...

Fiber optics is a new, emerging technology which offers relief from many of the problems which limited past communications links. Its inherent noise immunity and high bandwidth open the door for new designs with greater capabilities. Being a new technology, certain problems can be encountered in specifying and installing a fiber optic link. A general fiber optic system is discussed with emphasis on the advantages and disadvantages. It is not intended to be technical in nature, but a general discussion. Finally, a general purpose prototype Sandia communications link is presented.

The very high detection sensitivities and selectivities associated with coherent lightwave techniques furnish a basis for the exploitation of the great potential bandwidth of single-mode fibers in point-to-point and point-to-multipoint transmission. Attention is presently given to the theoretical advantages and limitations of the modulation and detection formats envisioned. An evaluation is made of the development status of prospective implementations of these techniques.

The telecommunications cable of the invention comprises a series of optical fibers (1) preferably coated with a colored identification layer (2); it is divided into modules, each enveloped by a retaining sheath (3) of small thickness, easily tearable, and preferably of different colors into contact with the optical fibers, and comprises a protective casing (4) in contact with the sheaths maintenance.

Preface. 1 Introduction. 1.1 Historical Perspective. 1.2 Basic Concepts. 1.3 Optical Communication Systems. 1.4 Lightwave System Components. Problems. References. 2 Optical Fibers. 2.1 Geometrical-Optics Description. 2.2 Wave Propagation. 2.3 Dispersion in Single-Mode Fibers. 2.4 Dispersion-Induced Limitations. 2.5 Fiber Losses. 2.6 Nonlinear Optical Effects. 2.7 Fiber Design and Fabrication. Problems. References. 3 Optical Transmitters. 3.1 Semiconductor Laser Physics. 3.2 Single-Mode Semiconductor Lasers. 3.3 Laser Characteristics. 3.4 Optical Signal Generation. 3.5 Light-Emitting Diodes. 3....

Given the increasing importance of a globally interconnected world, driven by modern digital services and the need for fast and reliable access to digital resources, communications networks are one of the key infrastructures in today’s society.

What Are Telecommunications? The Basic Principles - The Global Village Elements of Telecommunications Measurement of Information Signals Bandwidth Analogue and Digital Systems The Transmitter: Putting Signals on to Carriers Limits to Bandwidth: Signal Attenuation and Distortion The Receiver Why Do We Need Optics? - The Quest for Bandwidth Electromagnetic Waves Transmission with Electromagnetic Waves What Are Optical Fibers?: Guided Light - What is an Optical Fiber? Interaction of Light with Itself-Wave Interference Interaction of Light with Glass-Loss and Dispersion System Implications Fiber M...

The invention relates to a cable (2) Telecommunication flat optical fiber (4) comprising a plurality of micromodules (6) arranged in a web, each micromodule (6) comprising a plurality of optical fibers (4) and a fatty component applied between the fibers (4) and a sheath (8) extruded tape to the micromodules (6), the envelope of each micromodule (6) being coupled to the sheath (8) .L'invention further extends to the method fiber extraction (4) of such a cable (2). Such a cable may advantageously be installed vertically in a building.

With the incessant research and consummation in optical fiber communication, the technique will be applied more widely and bring maximal potential and predominance into play by all means.

The optic fiber communication,widely applied in practical engineering,has become the main technology in wire transmission network.Based on the practice and experiences of the teaching reform of this specialtyOptic Fiber Communication,the paper discusses its curricula design and adjustment,and presents some suggestions for the training of applicable graduates in this field.

Abstract : This report is the final report on a one-year technology development program for fiber optic coupler components. The devices investigated and developed were three port couplers, directionals and 'T' couplers, and reflective and transmissive star couplers with 7, 19 and 32 ports or port pairs respectively. These coupler components were fabricated by direct fusion of plastic clad silica (PCS) fiber cores. Power division or distribution in these couplers is proportional to the ratio of the area of any port to that of the total coupler cross-sectional area, termed area ratio splitting.

Glass fiber optics have been used for many years for flexible light distribution bundles, faceplates for cathode-ray tubes, medical endoscopes, and similar purposes. Only recently (1) has serious research been directed toward the use of glass fiber as a long distance communication medium (2, 3). Such a communication system requires three main components: a transmitter, a receiver, and a transmission medium. The transmitter will most likely consist of a GaAIAs laser or light emitting diode (LED) driven with a digital signal. Such transmitters can operate at a wavelength of 800-900 nm at data ra...

Optical fiber and photonics technology have dramatically impacted the way in which the world handles information. The ability to effectively manage and transport ever-increasing amounts of information, over broadband networks, will directly affect the economic vitality of nations and corporations. This paper profiles the development of commercially viable optical fiber and discusses some of the aspects of becoming a world-class competitor in optical telecommunications.

The requirements for the design of optical fiber communication networks used in telecommunication, data center communication, and analog applications are examined, including modal and chromatic dispersion, mode partition noise, relative intensity noise, and other link design parameters.

This paper provides an overview of recent developments affecting in-vehicle optical networks. Visible light sources are now being used in this field, bringing advantages in both visibility and workability. In particular, current trends and subjects affecting the key devices used in these networks, such as visible light sources, optical fibers, optical circuits and transceiver modules, are explained. We consider that the use of a wavelength division multiplexing (WDM) technology is promising for realizing further advances in high-speed communications. We will briefly introduce the optical devic...