Download or read book High Power Fiber Lasers for Directed Energy Applications written by and published by . This book was released on 2008 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: High-power fiber lasers can be incoherently combined to form the basis of a high-energy laser system for directed-energy applications. These applications include tactical directed energy and power beaming. Incoherent combining of fiber lasers has a number of advantages over other laser beam combining methods. The incoherently combined laser system is relatively simple, highly efficient, compact, robust, low-maintenance, and reliable. In this article, we characterize the atmospheric propagation of incoherently combined, high optical quality laser beams and compare them with other types of laser beams and combining methods. For tactical directed-energy applications, we find that the propagation efficiency of incoherently combined high optical quality beams is near the theoretical upper limit for any laser system with the same beam director and total power. We present results of the first atmospheric propagation experiments using incoherently combined, kilowatt-class, single-mode fiber lasers. These NRL field experiments combined four fiber lasers using a beam director consisting of individually controlled steering mirrors. The transmitted continuous-wave power was 3 kW at a range of 1.2 km with a demonstrated propagation efficiency of tilde 90% in moderate atmospheric turbulence. The experimental results are found to be in good agreement with simulations and theory.
Download or read book Incoherent Combining of High Power Fiber Lasers for Directed Energy Applications written by and published by . This book was released on 2008 with total page 25 pages. Available in PDF, EPUB and Kindle. Book excerpt: High-power fiber lasers can be incoherently combined to form the basis of a directed high-energy laser system. This approach has a number of advantages over other beam combining methods and can result in compact, robust, low maintenance and long-lifetime high-energy laser systems. The first field demonstration of incoherent beam combining using kilowatt-class, single-mode fiber lasers over a kilometer propagation range is discussed. The experiment employed four fiber lasers and a beam director consisting of individually controlled steering mirrors. Propagation efficiencies greater than 90% at power levels of 3 kilowatts were demonstrated at a range greater than 1 kilometer.
Download or read book Introduction to High Power Fiber Lasers written by R. Andrew Motes and published by . This book was released on 2013 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fiber Lasers written by Liang Dong and published by CRC Press. This book was released on 2016-09-19 with total page 313 pages. Available in PDF, EPUB and Kindle. Book excerpt: The fiber laser, with its humble beginning in the late 1980s, has undergone tremendous development in the past decade or so, transforming itself from a research curiosity to a major force in modern manufacturing. Today, it is revolutionizing our economy by fundamentally changing the way we mark, machine, and process materials on an industrial scale. The recent development of high-power fiber lasers is also fundamentally shaping a wide range of other areas from physical sciences and medicine to geology and space exploration. In the past few years, the tactical deployment of direct energy weapons based on fiber lasers has become a reality. The development of fiber lasers is rooted in a number of technical areas including optical materials, optical waveguide design, nonlinear optics, optical fiber fabrication, and optical characterization, in addition to optical fiber components, and fiber laser design and architecture. No comprehensive in-depth coverage of such diverse topical areas has appeared in a single book. Many important developments have taken place in the past decade in both academia and industry. This book comprehensively covers the basics, technology and applications of fiber lasers including up-to-date developments in both academia and industry and is aimed to serve as both an introduction and research aid for graduate students, engineers, and scientists who are new to this field and also for veterans in the field
Download or read book Incoherent Combining of High Power Fibers Lasers for Long Range Directed Energy Applications written by and published by . This book was released on 2006 with total page 23 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present a configuration for incoherently combining fiber lasers, which can be used for long-range directed energy applications. Unlike coherent beam combining approaches, incoherent combining does not require phase loclcing, the polarization of the lasers can be random, and the linewidths can be large. These relazed requirements allow for the use of recently developed high-power (>2 kW/fiber), single mode, high quality (M2 1.2) fiber lasers having relatively large linewidths (1%). These high-power lasers cannot be used for coherent beam combining. The proposed incoherent combining configuration consists ofafiberlaser array in which the beams dilfractto aspot size of-4cm onto individual collimating lenses. The collimated beams can be directed to a target many kilometers away by individual steering mirrors, which form the beam director. We present parameters for an incoherently combined laser system that can deliver 100 kW of CW power on a target area of 100 cm2 at a range of 5 km. The system has 49 fiber lasers and a beam director with transverse dimension 60 cm x 60 cm. This configuration is readily scalable to higher powers.
Download or read book High Power Ytterbium and Thulium Fiber Lasers written by Justin S. Cook and published by . This book was released on 2021 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt: High power fiber lasers have revolutionized many areas of both basic research and industry with their high power, high brightness output and capability for a compact, monolithic design. These systems are often run in multimode operation with few constraints on output. However, for many directed energy applications, such as spectral beam combining, the necessary laser parameters are far more stringent, requiring systems with state-of-the-art characteristics, such as single transverse mode operation, narrow linewidth and multi-kW output powers. Currently, further growth in output power of fiber laser systems at 1 and 2 [micrometer] is hindered by various nonlinear and thermal limitations within the fiber gain medium. Specifically, 1 [micrometer] systems are primarily hindered by transverse mode instability, while 2 [micrometer] lasers at high average powers often encounter an effect known as modulation instability. This dissertation explores the power scaling potential of both Yb-doped and Tm-doped fiber lasers along with related applications. Power scaling of two different Yb:fiber amplifiers is examined, where first, a novel confined-doping fiber geometry is used to generate 450 W single mode output, and second, through a demonstration of a Yb:fiber amplifier with > 2200 W output power and quasi-single mode beam quality. At 2 [micrometer], a new pumping architecture known as in-band pumping is utilized in an effort to take Tm-doped fiber amplifiers first to the multi-100 W level and then into the multi-kW regime. An in-band pumped laser is developed and characterized with over 75 W output power and > 80% slope efficiency. The last laser system constructed is a tunable, narrow linewidth Tm-doped fiber laser used to systematically induce and study the effects of thermal blooming. Results obtained from scanning the wavelength across individual atmospheric absorption resonances are presented, along with time-resolved data obtained at a fixed wavelength. Finally, two candidate fiber designs are presented for power scaling of in-band pumping at 2 [micrometer] to the multi-kW power level. Numerical studies detail the performance of these two fiber designs at high average powers and their ability to suppress the onset of modulation instability. Taken together, the results discussed in this dissertation further the science of fiber lasers for directed energy applications.
Download or read book Advances in High Power Fiber and Diode Laser Engineering written by Ivan Divliansky and published by Institution of Engineering and Technology. This book was released on 2019-12-30 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advances in High-Power Fiber and Diode Laser Engineering provides an overview of recent research trends in fiber and diode lasers and laser systems engineering. In recent years, many new fiber designs and fiber laser system strategies have emerged, targeting the mitigation of different problems which occur when standard optical fibers are used for making high-power lasers. Simultaneously, a lot of attention has been put to increasing the brightness and the output power of laser diodes. Both of these major laser development directions continue to advance at a rapid pace with the sole purpose of achieving higher power while having excellent beam quality. The book begins by introducing the principles of diode lasers and methods for improving their brightness. Later chapters cover quantum cascade lasers, diode pumped high power lasers, high average power LMA fiber amplifiers, high-power fiber lasers, beam combinable kilowatt all-fiber amplifiers, and applications of 2 μm thulium fiber lasers and high-power GHz linewidth diode lasers. Written by a team of authors with experience in academia and industrial research and development, and brought together by an expert editor, this book will be of use to anyone interested in laser systems development at the laboratory or commercial scale.
Download or read book Introduction to High power Fiber Lasers written by R. Andrew Motes and published by . This book was released on 2009 with total page 361 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fundamentals of Fiber Lasers and Fiber Amplifiers written by Vartan V. Ter-Mikirtychev and published by Springer Nature. This book was released on 2019-12-30 with total page 345 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book covers the fundamental aspects of fiber lasers and fiber amplifiers, and includes a wide range of material from laser physics fundamentals to state-of-the-art topics in this rapidly growing field of quantum electronics. This expanded and updated new edition includes substantial new material on nonlinear frequency conversion and Raman fiber lasers and amplifiers, as well as an expanded list of references inclusive of the recent literature in the field. Emphasis is placed on the nonlinear processes taking place in fiber lasers and amplifiers, their similarities, differences to, and their advantages over other solid-state lasers. The reader will learn the basic principles of solid-state physics and optical spectroscopy of laser active centers in fibers, the main operational laser regimes, and will receive practical recommendations and suggestions on fiber laser research, laser applications, and laser product development. The book will be useful for students, researchers, and professional physicists and engineers who work with lasers in the optical and telecommunications field, as well as those in the chemical and biological industries.
Download or read book Single Frequency Fiber Lasers written by Zhongmin Yang and published by Springer. This book was released on 2019-02-19 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book gives a contemporary overview of the technologies of single-frequency fiber lasers. The development of single-frequency fiber lasers is one of the most significant achievements in the field of laser photonics over the past two decades. Owing to the crucial demands of a laser sources with highly stable single-frequency operation, narrow linewidth, low noise, scalable to high output power, compact and robustness structure, fiber lasers have been intensively studied since its introduction to the single-frequency laser community and they still continuously proceed to trigger the emergence of new technologies and applications. This book systematically demonstrates the single-frequency fiber laser technologies from fundamental principles to state-of-the-art progress. Details of selected typical applications of single-frequency fiber lasers are also given and discussed. The reader will acquire a good knowledge of the current situation within this important field.
Download or read book Proceedings of the National Workshop on High Power Lasers and Directed Energy Applications written by and published by . This book was released on 2002 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book High Power Fiber Lasers for Industrial Applications written by Andrea Braglia and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Advances in high power lasers for interdisciplinary applications written by Shuo Liu and published by Frontiers Media SA. This book was released on 2023-12-22 with total page 181 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book High Power Laser Systems written by Masoud Harooni and published by BoD – Books on Demand. This book was released on 2018-10-03 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt: Laser is one of the most applicable sources of energy and it can be used in a large variety of applications such as defense, industries and medicine. The special characteristics of this source of energy make it very interesting for different applications. This book includes an interesting and recent collection of relevant research on the development of high-powered laser systems. It includes topics such as using a variety of methods to generate laser pulses in the femtosecond and attosecond range with different wavelengths. This book includes 10 chapters. This book is a very relevant source for researchers as well as engineers working with high-powered laser systems around the world.
Download or read book Tunable High power Fiber Laser and Its Application to Produce Brillouin Fiber Lasers written by Jonas Kestutis Valiunas and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fiber Lasers Basics Technology and Applications written by Russell Duffy and published by Createspace Independent Publishing Platform. This book was released on 2017-11-08 with total page 318 pages. Available in PDF, EPUB and Kindle. Book excerpt: The fiber laser, with its humble beginning in the late 1980s, has undergone tremendous development in the past decade or so, transforming itself from a research curiosity to a major force in modern manufacturing. Today, it is revolutionizing our economy by fundamentally changing the way we mark, machine, and process materials on an industrial scale. The recent development of high-power fiber lasers is also fundamentally shaping a wide range of other areas from physical sciences and medicine to geology and space exploration. In the past few years, the tactical deployment of direct energy weapons based on fiber lasers has become a reality.
Download or read book Rare Earth Doped High Power Fiber Lasers and Amplifiers written by Kunzhong Lu and published by . This book was released on 2001 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt:
