Author: Kevin Thomas Werner
Publisher:
ISBN:
Category : Femtosecond lasers
Languages : en
Pages : 200

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Book Description

Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :

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Book Description
Mid-infrared gas laser technology promises to become a unique tool for research in strong-field relativistic physics. The degree to which physics is relativistic is determined by a ponderomotive potential. At a given intensity, a 10[micro]m wavelength CO[sub 2] laser reaches a 100 times higher ponderomotive potential than the 1[micro]m wavelength solid state lasers. Thus, we can expect a proportional increase in the throughput of such processes as laser acceleration, x-ray production, etc. These arguments have been confirmed in proof-of-principle Thomson scattering and laser acceleration experiments conducted at BNL and UCLA where the first terawatt-class CO[sub 2] lasers are in operation. Further more, proposals for the 100 TW, 100 fs CO[sub 2] lasers based on frequency-chirped pulse amplification have been conceived. Such lasers can produce physical effects equivalent to a hypothetical multi-petawatt solid state laser. Ultra-fast mid-infrared lasers will open new routes to the next generation electron and ion accelerators, ultra-bright monochromatic femtosecond x-ray and gamma sources, allow to attempt the study of Hawking-Unruh radiation, and explore relativistic aspects of laser-matter interactions. We review the present status and experiments with terawatt-class CO[sub 2] lasers, sub-petawatt projects, and prospective applications in strong-field science.

Author: Rotem Kupfer
Publisher:
ISBN:
Category :
Languages : en
Pages : 348

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Book Description
Mid-infrared lasers have attracted significant attention over recent years because of the favorable scaling of many physical processes with increasing wavelength. We will present the development of mid-IR oscillators and the fabrication of gain media at UT Austin. We will then focus on two experiments using a mid-IR high average power, nanosecond laser: 1) A study of harmonic generation in polycrystalline semiconductors where we observed unusual scaling of the harmonics with the pump pulse energy. We developed a numerical model of the cascade random-quasi-phase-matched three-wave-mixing processes to explain the experimental observations. 2) A study of the plasma characteristics in laser induced breakdown spectroscopy with a nanosecond mid-IR excitation source. Using spectral measurements and a framing camera we observed a spatial separation of the plasma plume, increased emission signal with low white light generation, and a drop in the apparent plasma density with increasing pump energy. Our results can be explained by continuous heating of the plasma by the pump pulse due to the more efficient inverse bremsstrahlung absorption at longer wavelengths

Author: Irina T. Sorokina
Publisher: Springer Science & Business Media
ISBN: 3540006214
Category : Science
Languages : en
Pages : 600

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Book Description
The book describes the most advanced techniques for generating coherent light in the mid-infrared region of the spectrum. These techniques represent diverse areas of photonics and include heterojunction semiconductor lasers, quantum cascade lasers, tunable crystalline lasers, fiber lasers, Raman lasers, and optical parametric laser sources. Offering authoritative reviews by internationally recognized experts, the book provides a wealth of information on the essential principles and methods of the generation of coherent mid-infrared light and on some of its applications. The instructive nature of the book makes it an excellent text for physicists and practicing engineers who want to use mid-infrared laser sources in spectroscopy, medicine, remote sensing and other fields, and for researchers in various disciplines requiring a broad introduction to the subject.

Author: Michael Vincent Tripepi
Publisher:
ISBN:
Category : Gallium nitride
Languages : en
Pages : 0

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Book Description
As in all physical models, the response of a system to external perturbations is only approximately linear and with greater driving force, becomes nonlinear. The study of light interactions in solids is no different and with the development of laser technology, this can be explored with great detail. The use of femtosecond, and even few-cycle pulse lasers, allows for the study of very intense, localized interactions, which can range from frequency generation and spectral broadening of the incident pulse to photoionization of electrons and optical damage of the material itself. This work presents a trio of experiments that investigate the interaction of strong laser pulses with crystalline solids using femtosecond pulses. The first experiment characterizes the supercontinuum generation (SCG) in undoped, single-crystal yttrium aluminum garnet (YAG) optical fibers. Pump wavelengths near the zero-dispersion wavelength of YAG (1600 nm) are used to study SCG in both the normal and anomalous group-velocity dispersion (GVD) regimes. The output spectra of the fiber over many input pulse energies are collected for each pump wavelength and presented in 2D “energy scans.” Three different criteria are developed to help characterize the SCG in each energy scan. The second experiment looks at laser damage of gallium nitride (GaN) and gallium oxide (Ga2O3) using few-cycle pulses (FCPs) with a central wavelength near 760 nm. These experiments report on the damage thresholds as well as examine the crater morphology of single and multi-shot damage. Simulations using the Keldysh photoionization model and finite-difference time-domain method coupled to ionization and plasma effects are also employed to understand the carrier dynamics for single-shot exposure and possible mechanisms that differentiate FCP from longer femtosecond mechanisms. The final experiment returns to YAG in order to study damage under FCPs using a pump-probe technique known as time-resolved surface microscopy. The dynamics of the damage process are imaged from

Author: Kaoru Yamanouchi
Publisher: Springer Science & Business Media
ISBN: 3642350526
Category : Science
Languages : en
Pages : 235

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Book Description
The PUILS series delivers up-to-date reviews of progress in Ultrafast Intense Laser Science, a newly emerging interdisciplinary research field spanning atomic and molecular physics, molecular science, and optical science, which has been stimulated by the recent developments in ultrafast laser technologies. Each volume compiles peer-reviewed articles authored by researchers at the forefront of each their own subfields of UILS. Every chapter opens with an overview of the topics to be discussed, so that researchers unfamiliar to the subfield, as well as graduate students, can grasp the importance and attractions of the research topic at hand; these are followed by reports of cutting-edge discoveries. This ninth volume covers a broad range of topics from this interdisciplinary research field, focusing on ultrafast molecular responses to an intense laser field, advanced techniques for attosecond pulse generation, atomic and molecular responses to attosecond pulses, photoelectron spectroscopy of atoms and molecules interacting with intense light fields, and attosecond pulse interaction with solid materials.

Author: Audrius Dubietis
Publisher: Springer
ISBN: 3030149951
Category : Science
Languages : en
Pages : 125

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Book Description
This book presents the underlying physical picture and an overview of the state of the art of femtosecond supercontinuum generation in various transparent solid-state media, ranging from wide-bandgap dielectrics to semiconductor materials, and across various parts of the optical spectrum, from the ultraviolet to the mid-infrared. A particular emphasis is placed on the most recent experimental developments: multioctave supercontinuum generation with pumping in the mid-infrared spectral range, spectral control, power and energy scaling of broadband radiation and the development of simple, flexible and robust pulse compression techniques, which deliver few optical cycle pulses and which could be readily implemented in a variety of modern ultrafast laser systems. The expected audience includes graduate students, professionals and scientists working in the field of laser-matter interactions and ultrafast nonlinear optics.

Author: Wolfgang Kaiser
Publisher: Springer Science & Business Media
ISBN: 3540473033
Category : Science
Languages : en
Pages : 500

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Book Description
This second edition in paperback provides an up-to-date review of the state of the art in different generation processes for ultrashort laser pulses. Inaddition, extensive applications in a wide range of fields - in physics,engineering, chemistry, and biology - are discussed: Eight chapters dealwith the following topics: -the generation of picosecond and femtosecond laser pulses -nonlinear wave interactions - new investigations in solid-state physics - recent progress in optoelectronics - advances in coherent material excitations - ultrafast vibrational lifetimes and energy redistribution in liquids - new observations of chemical reactions in the liquid state - the primary processes of important biological systems The book is essential reading for scientists and engineers who want to know what is going on in this rapidly advancing field. It should also interest graduate students and others who seek an introduction to laserpulses.

Author: Kaoru Yamanouchi
Publisher: Springer Science & Business Media
ISBN: 3540959440
Category : Science
Languages : en
Pages : 322

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Book Description
This book features tutorial-like chapters on ultrafast intense laser science by world-leading scientists who are active in the rapidly developing interdisciplinary research field. It is written to give a comprehensive survey of all the essential aspects of ultrafast intense laser science. The volume covers theories of atoms and molecules in intense laser fields, high intensity physics scaled to long wavelength, pulse shaping techniques, non-linear optics in the XUV region, ultrafast X-ray spectroscopy, quantum emission and applications, filamentation, and ultraintense-laser matter interaction.

Author: National Academies of Sciences, Engineering, and Medicine
Publisher: National Academies Press
ISBN: 0309467721
Category : Science
Languages : en
Pages : 347

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Book Description
The laser has revolutionized many areas of science and society, providing bright and versatile light sources that transform the ways we investigate science and enables trillions of dollars of commerce. Now a second laser revolution is underway with pulsed petawatt-class lasers (1 petawatt: 1 million billion watts) that deliver nearly 100 times the total world's power concentrated into a pulse that lasts less than one-trillionth of a second. Such light sources create unique, extreme laboratory conditions that can accelerate and collide intense beams of elementary particles, drive nuclear reactions, heat matter to conditions found in stars, or even create matter out of the empty vacuum. These powerful lasers came largely from U.S. engineering, and the science and technology opportunities they enable were discussed in several previous National Academies' reports. Based on these advances, the principal research funding agencies in Europe and Asia began in the last decade to invest heavily in new facilities that will employ these high-intensity lasers for fundamental and applied science. No similar programs exist in the United States. Opportunities in Intense Ultrafast Lasers assesses the opportunities and recommends a path forward for possible U.S. investments in this area of science.