Numerous studies have investigated the role of photoionization in ultrafast laserinduced damage of bulk dielectrics. Fundamentals and prospects topics in applied physics series by robert w. Osa engineering equations for characterizing nonlinear. Past and present early research on selffocusing and filament formation of nanosecond and picosecond light pulses in nonlinear media is. Ebook readable online or download on pdf djvu txt doc mp3 cfm. It connects the extensive early literature on self focusing, filamentation, self trapping, and collapse with more recent studies aimed at issues such as self focusing of femtosecond pulses, white light generation, and the generation. Radial standing and selfsimilar waves for the hyperbolic. Chiao r y, gustafson t k, kelley p l 2009 self focusing.
Finally, the balance between the self focusing and plasma defocusing will set a. But it can be harnessed for the design of useful devices such as optical power limiters and switches. We observed single filament formation for ppcrit 15, whe. Selffocusing of cw laser beam with variable radius in. Conti c, di trapani p and trillo s 2009 xwaves in self focusing of ultrashort pulses self focusing. Frequency dependence in the initiation of ultrafast laser. Principles and experiments ebook written by claude rulliere. Helmut seidl, reinhard wilhelmdate released publisher. Scheulin, technical digest, iqec 2005 symposium self focusing. This paper provides a validated set of engineering equations for characterizing the self focusing distance from a laser beam propagating.
Supercontinuum emission from focused femtosecond laser pulses. Self focusing has been an area of active scientific investigation for nearly 50 years. Wise school of applied and engineering physics, cornell university, ithaca, new york 14853 and. Stronger self focusing of chirped pulse laser with exponential plasma density ramp profile in cold quantum magnetoplasma has been presented. Whitelight generation control with crossing beams of femtosecond laser pulses a. Marburger is associated with the mathematical characterization of this phenomenon. Their combined citations are counted only for the first. Sapphire laser in air under self focusing and filamentation are presented.
Download for offline reading, highlight, bookmark or take notes while you read laser physics. Selffocusing and filamentation of femtosecond pulses in air. Sep 18, 20 we report the demonstration, characterization, and modeling of meterscale underwater optical filaments using a nanosecond pulsed laser. Engineering equation for filamentation self focusing collapse. By taking the relativistic nonlinearity into account, an equation for envelope is set up and solved using wentzelkramersbrillouin and the paraxial ray. Past and present fundamentals and prospects topics in applied physics vol 114 berlin. Low value of the beam width parameter in the focal region due to nonlinear dielectric role of relativistic plasma with exponential density transition is observed. One coedited springer book, four book chapters, four papers were reprinted in book spie milestone series on selected reprints, one us patent and three soviet inventions patents, more than 180 publications, in total, including 41 papers in refereed journals, 47 papers in refereed conference. Fundamentals and prospects topics in applied physics download online ebook techniques virales avancees collection iris download online encyclopedia of agrophysics ebook download pdf. Stationary beams and femtosecond pulses selffocusing of optical beams multifocus structure.
Self focusing and solitons in photorefractive media self focusing, past and present. Previously, only the abstract had been published in j. Enhancing precision in fslaser material processing by. Publications selected publications and presentations publications and presentations summary. Atmospheric turbulence and loss will induce decreases in the filamentation self focusing collapse distance as the refractive index structure parameter and volume extinction coefficient, respectively, increase. Coherent property of light is taken into consideration by utilizing wigner transform method in solving self focusing threshold of partially coherent light in lma silica fibers. The self focusing of laser pulses is analyzed on the basis of the method of diffractionbeam tubes. In the present research work, the authors have investigated the selffocusing and defocusing of hermitecoshgaussian laser hchg beam in an inhomogeneous rippled density plasmas. Apr 07, 2010 laser physics ebook written by peter w. It connects the extensive early literature on selffocusing, filamentation, selftrapping, and collapse with more recent studies aimed at issues such as selffocusing of femtosecond pulses, white light generation, and the generation. Past and present is of interest to scientists and engineers working with lasers and their applications, as well as students, researchers, and laser and eye surgeons. Past and present 1115 july 2005, tokyo, japan, paper qfl24. Selffocusing and filamentation of femtosecond pulses in air and condensed matter. Past and present fundamentals and prospects springer.
It connects the extensive early literature on selffocusing, filamentation, selftrapping, and collapse with more recent studies aimed at issues such as selffocusing of femtosecond. This paper provides a validated analytical method for. Hopes and prospects repost free ebooks download ebookee. Propagation characteristics of hermitecoshgaussian laser. Selffocusing often leads to damage in optical materials and is a limiting factor in the design of highpower laser systems. Fundamentals and prospects topics in applied physics by robert w.
From selffocusing light beams to femtosecond laser pulse. The propagation of high peakpower laser beams in real atmospheres will be affected at long range by both linear and nonlinear effects contained therein. Self focusing and filamentation of femtosecond pulses in air and condensed matter. Pdf the nonlinear index of refraction is responsible for selfaction effects in optical. Splitting an ultrashort pulse into its constituent colors prior to focusing can result in more precise and betterconfined materials processing. This study examines the role of spectral width and instantaneous laser frequency in laserinduced damage using a frequency dependent multiphoton ionization model and numerical simulation of an 800 nm laser pulse propagating through fused silica.
Whitelight generation control with crossing beams of. Pdf selffocusing and solitons in photorefractive media. The threshold is a product of singlefrequency laser self focusing threshold and a correction factor including the partially coherent effect. Ultrahigh power exceeding the self focusing threshold by more than three orders of magnitude light beams from groundbased laser systems may find applications in spacedebris cleaning. Past and present presents a comprehensive treatment of. Selected publications and presentations university of rochester. Fundamentals and prospects topics in applied physics ebook by robert w. Shen springerverlag, new york, 2009 isbn 9780387321479. Selffocusing of a cw laser beam in rubidium atomic vapor was studied. Modulation of the optical beam with orbital angular momentum. Relativistic gaussian laser beam selffocusing in collisional.
The primary consequence of plasma generation is that its defocusing effect. Osa engineering equations for the filamentation collapse. Selffocusing threshold of partially coherent light in large. Relativistic gaussian laser beam self focusing in collisional quantum plasmas volume 33 issue 3 s. The analysis established that specific light structures were formed in a laser beam during self focusing. Past and present is of interest to scientists and engineers working with lasers and their applications, as well as students, researchers, and laser and eye surgeons topics. Aug 27, 2019 results of the theoretical study of the propagation of femtosecond pulses of a ti. Fundamentals and prospects 2009 edited by lukishova jointly with boyd and shen is one of the top 25% most downloaded ebooks in the springer ebook collection in 2012 and 2015 63. Stronger selffocusing of a chirped pulse laser with. Jan 17, 2020 the difference in the spatial structure of the strong control beam with orbital angular momentum oam and the gaussian mode will have different effects on self focusing and defocusing, which has the potential for realizing the modulation of the self focusing and the defocusing process of the probe light with oam.
Selffocusing and filamentation of femtosecond pulses. Simulation of selffocusing of femtosecond laser pulses in. The propagation of high peakpower laser beams in real atmospheres has been an active research area for a couple of decades. Selffocusing has been an area of active scientific investigation for nearly 50 years.