Download or read book Power Scaling of Laser Oscillators and Amplifiers Based on Nd YVO4 written by Michael James Yarrow and published by . This book was released on 2006 with total page 221 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Laser Precision Microfabrication written by Koji Sugioka and published by Springer. This book was released on 2010-08-13 with total page 353 pages. Available in PDF, EPUB and Kindle. Book excerpt: Miniaturization and high precision are rapidly becoming a requirement for many industrial processes and products. As a result, there is greater interest in the use of laser microfabrication technology to achieve these goals. This book composed of 16 chapters covers all the topics of laser precision processing from fundamental aspects to industrial applications to both inorganic and biological materials. It reviews the sate of the art of research and technological development in the area of laser processing.

Download or read book Study of the physics of the power scaling of end pumped solid state laser sources based on Nd YVO4 written by Ian Oliver Musgrave and published by . This book was released on 2003 with total page 209 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book 888 nm pumping of Nd YVO4 for high power TEM00 lasers written by Louis McDonagh and published by Cuvillier Verlag. This book was released on 2011-02-28 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt: For the last decade, neodymium-doped orthovanadate has established itself as the active material of choice for commercial solid-state lasers emitting in the 1 µm range, with output powers from several hundred milliwatts to a few tens of watts, in continuous-wave, short nanosecond Q-switched, or picosecond modelocked pulsed regimes. Its main advantages over other Nd-doped hosts such as YAG are a large stimulated-emission cross section leading to a high gain, a strong pump absorption allowing the efficient mode-matching of tightly-focused pump light, and a natural birefringence resulting in a continuously polarized output. The main drawbacks, however, are rather poor mechanical characteristics and strong thermal lensing, effectively limiting the maximum applicable pump power before excessively strong and aberrated thermal lensing prevents an efficient operation in a diffraction-limited beam, and ultimately the crystal’s fracture. Put aside the power limitation, the association of vanadate with diode end pumping allows for the realization of highly efficient and reliable laser sources based on well-known technologies, which provides an advantage in terms of manufacturability and cost-effectiveness over other high-potential technologies such as disks and fibers. This thesis introduces a novel pumping technique for Nd:YVO4 that allows for the realization of significantly higher-power laser sources with a high optical-to-optical efficiency and diffraction-limited beam quality, while keeping the benefits of a well-established technology. It consists in pumping at a wavelength of 888 nm instead of the classic 808 nm, providing a low and isotropic absorption, which results in a smooth distribution of the absorbed pump light in long crystals, effectively limiting the deleterious effects of high inversion density such as crystal end-facet bulging, high crystal temperature, aberrated thermal lensing, and upconversion. After presenting vanadate’s spectroscopic and physical characteristics, a complete analysis of the heatgenerating effects is performed, allowing for side-by-side simulations of the thermal effects in practical 808 nm and 888 nm pumped systems, and for an evaluation of their respective thermal lensing behaviors. Continuous-wave operation was thoroughly investigated, first in a multi-transversal mode oscillator to assess the maximum optical efficiency with optimum pump-mode matching and the thermal lensing characteristics. A TEM00 resonator was then developed with a single crystal and one pump diode, providing 60 W of output power with an optical efficiency of 55% and a beam quality of M2 = 1.05. This resonator was symmetrically replicated to form a periodic resonator, providing 120 W of output with the same optical efficiency and beam quality. This two-crystal configuration was then modified to an oscillator-amplifier configuration, providing a single-pass extraction efficiency of 53% and a total oscillator-amplifier output of 117 W without any beam-quality degradation. Intracavity doubling of the one and two-crystal configurations was achieved by inserting a non-critically phase-matched LiB5O3 (LBO) non-linear crystal in the resonator, providing up to 62 W of diffraction-limited green light at 532 nm with low-noise characteristics thanks to a large number of oscillating modes, thus limiting the effects of the “green problem”. A strong industrial interest resides in Q-switched lasers emitting nanosecond pulses, particularly with a high average power, high pulse repetition rate, and pulse durations of a few to several tens of nanoseconds. Achieving high-frequency and short-pulse operation both require a high gain, which explains the domination of Nd:YVO4 over lower-gain materials such as Nd:YAG or Yb:YAG. Thus, an acousto-optically Q-switched oscillator was demonstrated with 50 W output power and 28 ns pulse duration at 50 kHz. Pulse duration, however, is inversely proportional to the pulse energy, so that an increase in repetition rate inevitably results in an almost linear increase in pulse width. A cavity-dumped Q-switched oscillator was built to circumvent this limitation, the pulse length being defined by the cavity roundtrip time and the electro-optic cell switching time. It provided a constant pulse duration of 6 ns up to a repetition rate of 100 kHz and a maximum output power of 47 W. Such short pulse durations are normally available with output powers of a few watts from Q-switched lasers, and conversely Q-switched lasers of similarly high output power deliver pulses of several tens to over 100 ns in duration. There exists another strong interest in high average power quasi-cw picosecond sources, which allow for the efficient generation of green and UV radiation, or even red-green-blue for laser video projection. Passive mode locking with a semiconductor saturable absorber mirror (SESAM) is the preferred technique employed for the stable and self-starting generation of picosecond pulse trains, yet a high gain is necessary for achieving high repetition rates while avoiding the Q-switched mode-locking regime. Thus SESAM mode locking was applied to an 888 nm pumped oscillator, achieving 57 W of output power at a repetition-rate of 110 MHz and a pulse duration of 33 ps. Its output was efficiently amplified in a single pass up to 111 W without any beam quality, temporal, or spectral degradation. The high peak power of 30 kW allowed for the generation of 87 W of second harmonic at 532 nm with an efficiency of 80%, and 35 W of 355 nm third harmonic with a conversion efficiency of 33% in LBO crystals. The wide range of high-power systems demonstrated in this work illustrate the benefits of the optimized pumping of Nd:YVO4 at 888 nm, maintaining its highly-desirable characteristics such as a high gain and a polarized output while extending its power capabilities far beyond regular 808 nm pumped systems. This improvement should allow Nd:YVO4 systems to compete with high-power technologies such as disks and fibers, which often struggle in the generation of short pulses because of their low gain and strong non-linear effects, respectively.

Download or read book Femtosecond Technology for Technical and Medical Applications written by Friedrich Dausinger and published by Springer Science & Business Media. This book was released on 2004-10-14 with total page 350 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive overview of the principles and applications of femtosecond lasers, especially applied to medicine and to production technology. The advantages and problems of ultrashort laser pulses are discussed in more detail in the context of applications in the micro-machining of technical materials such as drilling, surface structuring and cutting, in medical use like dental, ophthalmologic, neurological and otolaryngological applications, in metrology, and in the generation of x-rays. Safety aspects are also considered.

Download or read book Handbook of Solid State Lasers written by B Denker and published by Elsevier. This book was released on 2013-02-20 with total page 688 pages. Available in PDF, EPUB and Kindle. Book excerpt: Solid-state lasers which offer multiple desirable qualities, including enhanced reliability, robustness, efficiency and wavelength diversity, are absolutely indispensable for many applications. The Handbook of solid-state lasers reviews the key materials, processes and applications of solid-state lasers across a wide range of fields.Part one begins by reviewing solid-state laser materials. Fluoride laser crystals, oxide laser ceramics, crystals and fluoride laser ceramics doped by rare earth and transition metal ions are discussed alongside neodymium, erbium and ytterbium laser glasses, and nonlinear crystals for solid-state lasers. Part two then goes on to explore solid-state laser systems and their applications, beginning with a discussion of the principles, powering and operation regimes for solid-state lasers. The use of neodymium-doped materials is considered, followed by system sizing issues with diode-pumped quasi-three level materials, erbium glass lasers, and microchip, fiber, Raman and cryogenic lasers. Laser mid-infrared systems, laser induced breakdown spectroscope and the clinical applications of surgical solid-state lasers are also explored. The use of solid-state lasers in defense programs is then reviewed, before the book concludes by presenting some environmental applications of solid-state lasers.With its distinguished editors and international team of expert contributors, the Handbook of solid-state lasers is an authoritative guide for all those involved in the design and application of this technology, including laser and materials scientists and engineers, medical and military professionals, environmental researchers, and academics working in this field. - Reviews the materials used in solid-state lasers - Explores the principles of solid-state laser systems and their applications - Considers defence and environmental applications

Download or read book Ultrafast Laser Processing written by Koji Sugioka and published by CRC Press. This book was released on 2013-06-24 with total page 606 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over the past few decades, the rapid development of ultrafast lasers, such as femtosecond lasers and picosecond lasers, has opened up new avenues for material processing due to their unique features such as ultrashort pulse width and extremely high peak intensity. These techniques have become a common tool for micro- and nanoprocessing of a variety

Download or read book Advances in Solid State Lasers written by Mikhail Grishin and published by BoD – Books on Demand. This book was released on 2010-02-01 with total page 642 pages. Available in PDF, EPUB and Kindle. Book excerpt: Invention of the solid-state laser has initiated the beginning of the laser era. Performance of solid-state lasers improved amazingly during five decades. Nowadays, solid-state lasers remain one of the most rapidly developing branches of laser science and become an increasingly important tool for modern technology. This book represents a selection of chapters exhibiting various investigation directions in the field of solid-state lasers and the cutting edge of related applications. The materials are contributed by leading researchers and each chapter represents a comprehensive study reflecting advances in modern laser physics. Considered topics are intended to meet the needs of both specialists in laser system design and those who use laser techniques in fundamental science and applied research. This book is the result of efforts of experts from different countries. I would like to acknowledge the authors for their contribution to the book. I also wish to acknowledge Vedran Kordic for indispensable technical assistance in the book preparation and publishing.

Download or read book High Average Power Diode Pumped Solid State Lasers Power Scaling With High Spectral and Spatial Coherence written by and published by . This book was released on 2009 with total page 97 pages. Available in PDF, EPUB and Kindle. Book excerpt: The main program objective was the development of a kilowatt class, cw Nd:YAG diode-laser-pumped solid-state laser (DPSSL) with quantum noise limited amplitude and phase, 24by7 operation capability and the ability to be repaired while in operation. The approach was a master-oscillator power-amplifier (MOPA) laser utilizing a series of zig-zag slab power amplifiers stages. We developed fiber amplifiers at the 200W level to generate power with high optical efficiency that can effectively extract energy from the power amplifier slabs. We also worked on the generation of high average power visible light by developing nonlinear optical materials with large apertures, low photo-refraction and minimal visible induced infrared absorption. The second objective was to develop a 1 joule, pulse-modulated, diffraction limited MOPA laser with less than 1 MHz line-width. A follow-on objective was frequency conversion to 1.5 or 2.0 microns for remote sensing applications. We demonstrated Yb:YAG slab lasers pumped with high brightness laser diodes. Supporting this project was the development of laser diodes operating in the 1.5 micron region for pumping of erbium doped laser hosts, and the synthesis of new low-loss polycrystalline laser host materials for in-band pumping into the upper laser level to improve the laser efficiency at eye-safe wavelengths. We developed orientation patterned Ga-As to frequency convert high peak power 1-micron radiation to eye-safe wavelengths in the mid-infrared for defense applications. The third objective, power scaling and determining the potential for phase-locking of ultra-fast laser systems for a wide range of sensing and machining applications, was demonstrated as well.

Download or read book Encyclopedia of Optical and Photonic Engineering Print Five Volume Set written by Craig Hoffman and published by CRC Press. This book was released on 2015-09-22 with total page 3726 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first edition of the Encyclopedia of Optical and Photonic Engineering provided a valuable reference concerning devices or systems that generate, transmit, measure, or detect light, and to a lesser degree, the basic interaction of light and matter. This Second Edition not only reflects the changes in optical and photonic engineering that have occurred since the first edition was published, but also: Boasts a wealth of new material, expanding the encyclopedia’s length by 25 percent Contains extensive updates, with significant revisions made throughout the text Features contributions from engineers and scientists leading the fields of optics and photonics today With the addition of a second editor, the Encyclopedia of Optical and Photonic Engineering, Second Edition offers a balanced and up-to-date look at the fundamentals of a diverse portfolio of technologies and discoveries in areas ranging from x-ray optics to photon entanglement and beyond. This edition’s release corresponds nicely with the United Nations General Assembly’s declaration of 2015 as the International Year of Light, working in tandem to raise awareness about light’s important role in the modern world. Also Available Online This Taylor & Francis encyclopedia is also available through online subscription, offering a variety of extra benefits for researchers, students, and librarians, including: Citation tracking and alerts Active reference linking Saved searches and marked lists HTML and PDF format options Contact Taylor and Francis for more information or to inquire about subscription options and print/online combination packages. US: (Tel) 1.888.318.2367; (E-mail) [email protected] International: (Tel) +44 (0) 20 7017 6062; (E-mail) [email protected]

Download or read book Advanced Solid State Photonics written by and published by . This book was released on 2004 with total page 538 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Towards a Compact Thin Disk Based Femtosecond XUV Source written by Oleg Pronin and published by Springer Science & Business Media. This book was released on 2013-09-03 with total page 139 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis provides unique information on the Kerr-lens mode-locking (KLM) technique applied to a thin-disk laser. It describes in detail cavity geometry, the qualitative approach to KLM, and self-starting behavior in the regime of both negative and positive dispersion. Comprehensive comparative analysis of KLM and semiconductor saturable absorber techniques is also carried out. Recent successful experiments on carrier-envelope phase stabilization, spectral broadening and compression of output of this oscillator underline the importance of this new, emerging technology.

Download or read book Advances in Optoelectronic Technology and Industry Development written by Gin Jose and published by CRC Press. This book was released on 2019-09-25 with total page 315 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents recent and important developments in the field of Photonics and Optoelectronics, with a particular focus on Laser Technology, Optical Communications, Optoelectronic Devices and Image Processing. At present, Photonics and Optoelectronics Technologies are pivotal to the future of laser, displays, sensors and communication technologies, and currently being developed at an extraordinary rate. This book details the theories underlying the mechanisms involved in the relevant Photonics and Optoelectronics. Devices such as laser diodes, photodetectors, and integrated optoelectronic circuits are investigated. The reviews by leading experts are of interest to researchers and engineers as well as advanced students.

Download or read book Power Scaling of Fiber based Amplifiers Seeded with Microchip Lasers written by and published by . This book was released on 2008 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Index to IEEE Publications written by Institute of Electrical and Electronics Engineers and published by . This book was released on 1998 with total page 1234 pages. Available in PDF, EPUB and Kindle. Book excerpt: Issues for 1973- cover the entire IEEE technical literature.

Download or read book Chemically Driven Visible Laser Amplifiers and Oscillators Based on Fast Electronic Energy Transfer written by J. L. Gole and published by . This book was released on 1993 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Power Scaling Concepts in Fiber Lasers and Amplifiers written by Jaclyn Su Phin Chan and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: