2-Hz 109-nm mirrorless laser

Sher, M. H.; Benerofe, S. J.; Young, Jeff F.; Harris, S. E.

doi:10.1364/josab.8.000114

Cited by 25 publications

(10 citation statements)

References 3 publications

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“…185 Output energies of several J in this transition were subsequently obtained at a 2 Hz repetition rate by Sher et al utilizing traveling wave excitation. 186 Amplification in the equivalent transition in Kr at 90.7 nm was also observed. 187 However, no demonstration of a photoionization laser at x-ray wavelengths has yet been realized.…”

Section: Photoionization and Resonant Photopumpingmentioning

confidence: 87%

Table-top Soft X-Ray Lasers

Rocca

2016

Conference on Lasers and Electro-Optics

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This article reviews the progress in the development of practical table-top sources of soft x-ray laser radiation. The field is rapidly approaching the stage at which soft x-ray lasers sufficiently compact to fit onto a normal optical table will be routinely utilized in science and technology. This is the result of recent advances in the amplification of soft x-ray radiation in both compact laser-pumped and discharge-pumped devices. The use of excitation mechanisms that take full advantage of new ultrafast high power optical laser drivers and multiple pulse excitation schemes has resulted in the demonstration of saturated soft x-ray amplification at wavelengths as short as 14 nm using several Joule of laser-pump energy. Moreover, several schemes have demonstrated significant gain with only a fraction of a Joule of laser-pump energy. In addition, the demonstration of saturated table-top soft x-ray lasers pumped by very compact capillary discharges has shattered the notion that discharge-created plasmas are insufficiently uniform to allow for soft x-ray amplification, opening a route for the development of efficient, high average power soft x-ray lasers. Recently, a table-top capillary discharge laser operating at 46.9 nm has produced millijoule-level laser pulses at a repetition rate of several Hz, with a corresponding spatially coherent average power per unit bandwidth comparable to that of a beam line at a third generation synchrotron facility. This review summarizes fundamental and technical aspects of table-top soft x-ray lasers based on the generation of population inversions in plasmas, and discusses the present status of development of specific laser systems.

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Section: Photoionization and Resonant Photopumpingmentioning

confidence: 87%

Table-top Soft X-Ray Lasers

Rocca

2016

Conference on Lasers and Electro-Optics

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“…He products of CsF photoionization, however, have no was used as a buffer gas to maintain the heat-pipe measurable absorption at 185 nm, so the loss can be effectively eliminated with sufficient pumping flux. Detailed kinetic studies 9 excitation, which is important for short-lifetime -5 r (nm) upper levels. Our experimental setup is shown in Fig.…”

Section: Publications and Presentations Of Supported Workmentioning

confidence: 99%

“…Gains of about exp (7) were first observed in the Xe+ 2 Auger system using a 55 J 1064 nm pump laser [5]. Subsequent optimization of operating parameters [7], and the development of new pumping geometries [8] resulted in an equivalent small signal gain of exp(33), and a saturated ouput energy of one microjoule using a 0.5 J pump laser [9]. Our present system achieves gains of about exp ( 2 5) and output energies of 1 J using a 250 mJ, -100 psec pump pulse, the lowest pump energy reported for saturated output to date.…”

Section: G-044mentioning

confidence: 99%

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Development and Application of XUV Lasers

Young¹

1993

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SForm Approved AD-A277 173 CUMENTATION PAGEoB No. 07o0o41o8 nal&on~i .&etimated to a~e'age I hour per respo0"e. including the timne for revinnewing infltntJctionsr. tearcninng e..sting date sources. )molettng and revoewing the colilecton of informatiOn. Send comments reardinq this b.urden estimate orny other a•,ea of this reduciong this ourden. to Whaington Headquarter% Services. Directorate for int rmatnOn Operations anotegOrl$. 12IS jeflerson 02. and to the Othce of Management and Sudget. Paperwork teduction ABSTRACT (Maximum 200 words)The focus of this program is the development of extreme ultraviolet (XUV) lasers and their application to scientific problems. Laser development concentrates on the laboratory-scale lasers near 100 nm. The current application area is the development of very high resolution, microscopic imaging techniques. Such techniques should have a number of applications and be particularly useful in the life sciences. This report presents recent progress on XUV laser development. DTIC IntroductionThis program supported two related types of activities because there was a change of Principal Investigator (PI) during the period. The work of the original PI, Dr. P. J. K. Wisoff, concentrated on the development of short-pulse, blue-green dye laser systems, and their amplification to terawatt levels in a XeF(C --. A) electron-beam pumped, excimer amplifier system. This research, initiated under an earlier AFOSR grant, was very successful and of significant interest to the scientific community, as indicated by the list of publications and presentations in Section XX. Early in the first year of the grant period, Dr. Wisoff left Rice University to join the NASA Astronaut program. Dr. J. F. Young joined the Rice faculty at that time and took over direction of the program. In collaboration with Dr. Wisoff, he continued the existing projects to natural and productive conclusions, while initiating a new, but related, program focused on the development of extreme ultraviolet (XUV) lasers and their application to scientific problems. Laser development concentrated on the laboratory-scale Xe and H 2 lasers near 100 nm. The current application area is the development of very high resolution, microscopic imaging techniques. Such techniques should have a number of applications, and be particularly useful in the life sciences. This report reviews both areas of activities. Named an IBM Graduate Fellow, 1992-1993 Picked for Director Fellowship, Los Alamos National Laboratory, 1993. Program Highlights"* The dispersion of optical fibers around 500 nm was measured, and the data used to construct a fiber-prism pulse compressor. This was the first use of this technique in the blue-green spectral region."• A two-stage dye amplifier for blue-green, subpicosecond pulses was designed to supply injection pulses to the XeF(C --+ A) excimer amplifier."* The gain, energy output, saturation, and beam profile of the e-beam excited XeF(C --A) excimer amplifier was measured for various injection pulse lengths. "* Self-focusin...

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“…Ce type d'excitation a permis d'obtenir la saturation de la transition laser pour de relativement faibles puissances de pompage dans les cas du laser Auger Xelll à 109 nm et du laser H 2 à 116 nm (bande de Werner) 77 . On peut citer également l'effet très favorable d'une excitation initiale de faible énergie sur l'excitation du laser Auger Xelll par faisceau d'X mous 80 .…”

Section: Autres Sources Vuv Primairesunclassified

Nouvelles sources photoniques VUV à pompage collisionnel

Fontaine

Sentís

1992

Ann. Phys. Fr.

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Recent progress achieved in the international community on pulsed collisionally excited coherent and incoherent primary sources emitting at very short wavelength are reviewed. Enphasis is made on Rg 2 rare gas excimers, rare gas-alkali and alkali-halogen ionic excimers, UV-VUV emissions from surface discharge, and long pulse high efficiency KrCI excimer laser (x = 222 nm). These systems are discussed as well as their perspectives and potential applications. 1.-IntroductionDepuis une quinzaine d'années la communauté scientifique des physiciens s'intéresse activement aux processus physiques pouvant mener à des émissions cohérentes et incohérentes intenses dans le domaine spectral de l'ultraviolet lointain et si possibles accordables en longueur d'onde. Ces recherches sont fortement motivées par d'importantes applications potentielles de ces sources dansées domaines aussi variés que le traitement des matériaux, la photochimie, la biologie, etc 1 " 5 .L'objet du présent article est de présenter les progrès récents obtenus, au plan international, sur de nouvelles sources photoniques prometteuses émettant dans le domaine spectral de l'ultraviolet lointain (X-50-200 nm) à la suite de processus collisionnels induits dans des milieux gazeux à haute pression par une excitation au moyen de systèmes électriques ou optiques impulsionnels (faisceau d'électrons relativistes k décharge, faiscea^i de/ayons X). Le cas des lasers à exciplexes ou assimilés UV-VUV XeF ^XeCI , KrF , ArF , F2 étant traité dans un autre article du même numéro du J. de Physique", n'est pas abordé ici. Un effort particulier est fart sur la description des systèmes photoniques VUV suivants: (a) excimères de gaz rare Rg 2 , (b) exciplexes ioniques gaz rare-alcalin Rg + A, (c) exciplexes ioniques alcalin-halogène A + X, (d) sources photoniques issues d'une décharge sur une ferrite préalablement formée, (e) laser à exciplexes KrCI (X = 222 nm ) à rendement élevé en régime d'impulsions longues, (f) quelques autres sources VUV primaires. Excimères de gaz raresAprès avoir donné de grands espoirs en tant que source cohérente accordable de grande puissance et rendement élevé dans le VUV au moment de leur découverte en 1973 (excitation par un faisceau d'électrons relativistes puisé intense' 7,8 , les lasers à excimères de gaz rares ont montré rapidement leur limitations, celles-ci sont dues principalement à une photo ionisation à la longueur d'onde laser du niveau supérieur de la transition et à une destruction des miroirs par le flux VUV intense, ce qui réduit fortement l'énergie qu'il est possible d'extraire sous la forme d'un faisceau cohérent. Aussi, bien que. plusieurs émissions laser interjses aient été mises en évidence dans les années 1970 ( Ar 2 à 120 nm, Kr 2 à 132 nm, Xe 2 à 172 nm) , il s'en est suivi un fort ralentissement des recherches sur ces systèmes dans les années 1980. Récemment un net regain d'intérêt est apparu pour ces systèmes comme lasers et, surtout, comme sources incohérentes à haut rendement.Une étude des lasers Xe 2 * et Kr 2...

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2-Hz 109-nm mirrorless laser

Cited by 25 publications

References 3 publications

Table-top Soft X-Ray Lasers

Table-top Soft X-Ray Lasers

Development and Application of XUV Lasers

Nouvelles sources photoniques VUV à pompage collisionnel

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