Generation of coherent radiation at 570 Å by frequency tripling

Hutchinson, M. H. R.; Ling, C. C.; Bradley, D.J.

doi:10.1016/0030-4018(76)90422-3

Cited by 39 publications

(6 citation statements)

References 2 publications

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“…2 made in Ref. 4. Indeed, the results obtained there bear only a faint resemblance to ours or to the experimental data.)…”

supporting

confidence: 75%

“…1 " 3 Such processes have been used to produce coherent radiation at wavelengths as short as 57.0 nm. 4 The generation of coherent light in the extreme ultraviolet region by third-order processes becomes increasingly difficult because of the scarcity of intense coherent sources at the required pumping wavelengths. The development of frequency conversion techniques utilizing higher-order nonlinearities offers an attractive alternative to this approach, since it would allow larger steps along the frequency scale to be made in a single conversion process.…”

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confidence: 99%

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Generation of Coherent Radiation at 53.2 nm by Fifth-Harmonic Conversion

et al. 1976

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PHYSICAL REVIEW LETTERS 6 DECEMBER 1976 sponding nd amplitudes and coherent addition of the pure Coulomb amplitude. 11 This amounts to neglecting the Coulomb modifications of the strong nd amplitudes which, in the present formalism, means neglect of all shorter-range Coulomb effects in V ,(M) and G 0 (/J) . However, we are now in the position to check the reliability of such a procedure. For this purpose we have included in Fig. 2 the cross sections obtained in such a way. It appears that at low energies this approximate treatment is rather unsatisfactory, whereas it may become more reliable at higher energies.In conclusion we emphasize once more that our approach to the Coulomb corrections in pd scattering is not only mathematically correct but also well suited for practical applications with no need for drastic approximations. (This is in contrast to the use of the formalism of Ref. 2 made in Ref. 4. Indeed, the results obtained there bear only a faint resemblance to ours or to the experimental data.) Apart from employing separable nuclear potentials, only one approximation has been made in the present calculations. Namely, the effective potentials and Green's functions which determine, via Eq. (7), the Coulomb-modified strong amplitude Tsc (ll) 9 are evaluated to lowest order in e 2 only. However, the neglect of higher-order terms can and will be checked. Furthermore, the difficult question which is bound to plague most other approaches of how many partial waves in the pp subsystem should be taken into account never does arise in our method where, characteristically, Frequency upconversion using third-harmonic generation and four-wave mixing has received attention in recent years for the generation of coherent radiation in the vacuum ultraviolet (VUV) region of the spectrum. 1 " 3 Such processes have been used to produce coherent radiation at wavelengths as short as 57.0 nm. 4 The generation of coherent light in the extreme ultraviolet region by third-order processes becomes increasingly difficult because of the scarcity of intense coherent sources at the required pumping wavelengths. the full three-dimensional Coulomb potential is built in.The development of frequency conversion techniques utilizing higher-order nonlinearities offers an attractive alternative to this approach, since it would allow larger steps along the frequency scale to be made in a single conversion process.Several of these processes have been suggested in the literature. 5 * 6 Although reasonable conversion efficiencies have been predicted for some of these interactions, the only published experimental evidence of such processes has been the fifth-The generation of coherent radiation of 53.2 nm by fifth-harmonic conversion of laser pulses at 266.1 nm in both Ne and He is reported.1540

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“…2 made in Ref. 4. Indeed, the results obtained there bear only a faint resemblance to ours or to the experimental data.)…”

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confidence: 75%

mentioning

confidence: 99%

Generation of Coherent Radiation at 53.2 nm by Fifth-Harmonic Conversion

et al. 1976

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“…This configuration is similar to that used in previous studies. 5 ' 6 The optimum xenon pressure was found to be -10 Torr, independent of input wavelength or intensity.…”

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confidence: 95%

“…The excimer-laser systems provide highly attractive fundamental sources for frequency conversion to the XUV because of their demonstrated ability to deliver tunable, very-high-spectral-brightness radiation in the ultraviolet region. This ability was clearly demonstrated by the early work of Hutchinson et at., 5 who produced tunable, coherent radiation at -57 nm by frequency tripling a xenon excifer laser.…”

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confidence: 99%

Generation of high-spectral-brightness tunable XUV radiation at 83 nm

et al. 1980

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High-spectral-brightness coherent XUV radiation has been produced by third-harmonic generation of a transformlimited- bandwidth KrF* laser in gaseous xenon. The observed XUV output, which was continuously tunable from 82.8 to 83.3 nm, had a peak power of 40 mW, a bandwidth <0.01 cm(-1), and absolute frequency control to within 0.04 cm(-1). The utility of this XUV source for high-resolution spectroscopic applications is demonstrated by absorption studies in molecular hydrogen.

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“…Laser techniques for generating extreme-ultraviolet (XUV) radiation' have made intense sources of coherent and incoherent radiation available below 1000 A. For example, nonlinear processes have been used to generate high-order harmonics of Nd:YAG lasers 2 (from 887 to 380 A), excimer lasers 3 (from 1027 to 570 A), and tunable dye lasers 4 (near 930 A). One difficulty in using such radiation is that the residual high-powered laser radiation at the fundamental wavelength is usually collinear with and typically 6 orders of magnitude more intense than the generated harmonic in the XUV.…”

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confidence: 99%

Dichroic beam splitter for extreme-ultraviolet and visible radiation

Falcone

Bokor²

1983

Opt. Lett.

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A simple dichroic beam splitter capable of separating extreme-ultraviolet (XUV) radiation from high-powered visible and UV laser beams is demonstrated. The device has high XUV reflection efficiency (R approximately 44%) and high damage resistance to intense laser radiation and is therefore applicable to laser-generated XUV radiation sources, including harmonic generation, sum-frequency mixing, and anti-Stokes Raman scattering.

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Generation of coherent radiation at 570 Å by frequency tripling

Cited by 39 publications

References 2 publications

Generation of Coherent Radiation at 53.2 nm by Fifth-Harmonic Conversion

Generation of Coherent Radiation at 53.2 nm by Fifth-Harmonic Conversion

Generation of high-spectral-brightness tunable XUV radiation at 83 nm

Dichroic beam splitter for extreme-ultraviolet and visible radiation

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