Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Optics Letters

Generation of coherent tunable VUV radiation near the Ly-β transition of atomic hydrogen

John F. Reintjes

Published Aug 1, 1980• 22 citations
Publisher

Abstract

Third-harmonic conversion of light from a frequency-tuned XeCl laser is used to generate coherent vacuum-ultraviolet radiation that is tunable from 102.55 to 102.83 nm, a range that includes the Ly-β transition of atomic hydrogen at 102.57 nm. The use of this radiation for the detection of neutral hydrogen atoms by resonance fluorescence is discussed.

DOI
10.1364/ol.5.000342

Related papers

Generation of continuously tunable coherent vacuum-ultraviolet radiation in Cd vapor

Kenzo Miyazaki, Hirofumi Sakai, Takuzo Sato

Continuously tunable coherent vacuum-ultraviolet (VUV) radiation has been generated in the 128.7-135.3-nm region by two-photon resonant four-wave mixing in Cd vapor. The generated VUV has no spectral structure over the tuning range and indicates that Cd vapor is an efficient nonlinear medium for frequency conversion.

Optics Letters•Oct 1, 1984•14 citations

Generation of high-brightness coherent radiation in the vacuum ultraviolet by four-wave parametric oscillation in mercury vapor

Jeffrey Bokor A, Richard R. Freeman, R. L. Panock +1 more

Coherent radiation at several wavelengths in the vacuum ultraviolet (VUV) has been generated by four-wave parametric oscillation in mercury vapor. When a powerful ultraviolet pump laser of frequency omega(p) is tuned to a two-photon resonance, VUV signal photons at frequency omega(s), as well as idler photons at frequency omega(i), are generated such that omega(s) + omega(i) = 2omega(p). A frequency-doubled dye laser tuned to two-photon resonance with the 6s6d(1)D(2) level near 280.3 nm produced output at 184.9 and 143.5 nm. A tunable krypton fluoride excimer laser tuned to two-photon resonance with the 6s10s (1)S(0) level near 248.7 nm produced output at 140.1, 130.7, 130.1, 125.9, and 125.0 nm. Approximately 1-microJ, 200-W pulses were observed at 143.5 and 125.9 nm.

Optics Letters•Apr 1, 1981•60 citations

Non-Linear Mixing

K. H. Welge

We report investigations with tunable VUV radiation, employing VUV generation in regions down to the cut-off wavelength of lithium fluorid crystal (~ 110 nm) by frequency tripling of tunable UV from dye laser. -Experiments on multiphoton excitation and ionization of atomic hydrogen with tunable VUV light at Lyman-α, have been carried out with the following objectives: (1) sensitive H and D atom detection by two-photon ionization i. e. 1s ω Lyα → 2 p ω uv → ion , (2) two-photon ionization of H with high resolution at Lyman-α to resolve the hyperfine groundstate doublet, aiming at the production of polarized protons, (3) state selective production of high Rydberg states ( 1 s ω Lyα → 2p ω uv → ns, nd ) , and their ionization, (4) Doppler line shape spectroscopy at Lyman-α applied to recoil energy and momentum distribution measurements of H and D atoms in dissociation processes. -Depending on the objective, different experimental conditions and systems have been employed, for instance atomic beam configuration, mass-spectroscopic ion detection, field ionization in cryogenetic environment, and for Doppler measurements laser induced fluorescence.

Topical Meeting on Laser Techniques in the Extreme Ultraviolet•Jan 1, 1982•0 citations

Tunable Coherent Vacuum-Ultraviolet Generation in Atomic Vapors

R. T. Hodgson, P. P. Sorokin, James J. Wynne

Two tunable dye lasers have been used to generate coherent radiation at a tunable sum frequency in the vacuum-ultraviolet spectral region. Spectral ranges of \ensuremath{\sim}3500 ${\mathrm{cm}}^{\ensuremath{-}1}$ around 1895 \AA{} and \ensuremath{\sim}1200 ${\mathrm{cm}}^{\ensuremath{-}1}$ around 1798 \AA{} have been covered. These ranges may easily be extended. Large (\ensuremath{\sim}\ifmmode\times\else\texttimes\fi{}${10}^{4}$) enhancements of $2{\ensuremath{\nu}}_{1}+{\ensuremath{\nu}}_{2}$ sum mixing are seen when $2{\ensuremath{\nu}}_{1}$ is tuned to a double-quantum allowed transition from the ground state in Sr vapor.

Physical Review Letters•Feb 18, 1974•256 citations

Generation of continuously tunable coherent vacuum-ultraviolet radiation (140 to 106 nm) in zinc vapor

W. Jamroz, Paul E. LaRocque, Boris Peter Stoicheff

It is shown that resonantly enhanced, four-wave frequency mixing in Zn vapor provides coherent vacuum-ultraviolet radiation that is continuously tunable over the range 140.4 to 106.3 nm (or ~23000 cm(-1)).

Optics Letters•Dec 1, 1982•43 citations

Two-photon excitation of the n = 3 level in H and D atoms

Jeffrey Bokor A, Richard R. Freeman, J. C. White +1 more

Tunable coherent ultraviolet radiation has been used to excite selectively the $n=3$ level in hydrogen and deuterium atoms via two-photon absorption from the ground state. The resulting Balmer-$\ensuremath{\alpha}$ fluorescence at 656 nm was observed as well as resonant three-photon ionization. This work demonstrates several advantages over other techniques for selective detection of neutral H and D atoms, including three-dimensional spatial resolution and a remote monitoring capability afforded by the use of laser-induced-fluorescence detection.

IEEE Journal of Quantum Electronics•Dec 1, 1981•3 citations
Third-harmonic conversion of light from a frequency-tuned XeCl laser is used to generate coherent vacuum-ultraviolet radiation that is tunable from 102.55 to 102.83 nm, a range that includes the Ly-β transition of atomic hydrogen at 102.57 nm. The use of this radiation for the detection of neutral hydrogen atoms by resonance fluorescence is discussed.
Coherent radiation at several wavelengths in the vacuum ultraviolet (VUV) has been generated by four-wave parametric oscillation in mercury vapor. When a powerful ultraviolet pump laser of frequency omega(p) is tuned to a two-photon resonance, VUV signal photons at frequency omega(s), as well as idler photons at frequency omega(i), are generated such that omega(s) + omega(i) = 2omega(p). A frequency-doubled dye laser tuned to two-photon resonance with the 6s6d(1)D(2) level near 280.3 nm produced output at 184.9 and 143.5 nm. A tunable krypton fluoride excimer laser tuned to two-photon resonance with the 6s10s (1)S(0) level near 248.7 nm produced output at 140.1, 130.7, 130.1, 125.9, and 125.0 nm. Approximately 1-microJ, 200-W pulses were observed at 143.5 and 125.9 nm.
We report investigations with tunable VUV radiation, employing VUV generation in regions down to the cut-off wavelength of lithium fluorid crystal (~ 110 nm) by frequency tripling of tunable UV from dye laser. -Experiments on multiphoton excitation and ionization of atomic hydrogen with tunable VUV light at Lyman-α, have been carried out with the following objectives: (1) sensitive H and D atom detection by two-photon ionization i. e. 1s ω Lyα → 2 p ω uv → ion , (2) two-photon ionization of H with high resolution at Lyman-α to resolve the hyperfine groundstate doublet, aiming at the production of polarized protons, (3) state selective production of high Rydberg states ( 1 s ω Lyα → 2p ω uv → ns, nd ) , and their ionization, (4) Doppler line shape spectroscopy at Lyman-α applied to recoil energy and momentum distribution measurements of H and D atoms in dissociation processes. -Depending on the objective, different experimental conditions and systems have been employed, for instance atomic beam configuration, mass-spectroscopic ion detection, field ionization in cryogenetic environment, and for Doppler measurements laser induced fluorescence.
Two tunable dye lasers have been used to generate coherent radiation at a tunable sum frequency in the vacuum-ultraviolet spectral region. Spectral ranges of \ensuremath{\sim}3500 ${\mathrm{cm}}^{\ensuremath{-}1}$ around 1895 \AA{} and \ensuremath{\sim}1200 ${\mathrm{cm}}^{\ensuremath{-}1}$ around 1798 \AA{} have been covered. These ranges may easily be extended. Large (\ensuremath{\sim}\ifmmode\times\else\texttimes\fi{}104{10}^{4}104) enhancements of $2{\ensuremath{\nu}}_{1}+{\ensuremath{\nu}}_{2}$ sum mixing are seen when $2{\ensuremath{\nu}}_{1}$ is tuned to a double-quantum allowed transition from the ground state in Sr vapor.
Tunable coherent ultraviolet radiation has been used to excite selectively the n=3n=3n=3 level in hydrogen and deuterium atoms via two-photon absorption from the ground state. The resulting Balmer-$\ensuremath{\alpha}$ fluorescence at 656 nm was observed as well as resonant three-photon ionization. This work demonstrates several advantages over other techniques for selective detection of neutral H and D atoms, including three-dimensional spatial resolution and a remote monitoring capability afforded by the use of laser-induced-fluorescence detection.